2024-20545. Manufactured Home Construction and Safety Standards

Summary Table of New and Updated IBR Standards Under § 3280.4

[4th/5th Set Final Rule]

Number	N/U	Standard	Publishing organization	Title	Year	3280.4	Impacted sections
1	U	AAMA 1701.2	American Architectural Manufacturers Association	Voluntary Standard for Utilization in Manufactured Housing for Primary Window and Sliding Glass Doors	2012	(u)(3)	3280.403(b) and (e), 3280.404(b) and (e).
2	U	AAMA 1702.2	American Architectural Manufacturers Association	Voluntary Standard for Utilization in Manufactured Housing for Swinging Exterior Passage Doors	2012	(u)(4)	3280.403(e), 3280.405(b) and (e).
( print page 75730)
3	U	AAMA 1704	American Architectural Manufacturers Association	Voluntary Standard Egress Window Systems for Utilization in Manufactured Housing	2012	(u)(5)	3280.404(b) and (e).
4	U	AAMA/WDMA/CSA 101/I.S.2/A440	American Architectural Manufacturers Association/Window and Door Manufacturers Association	North American Fenestration Standard/Specification for Windows, Doors, and Skylights	2017	(r)(1)	3280.304(b)(1), 3280.403(b) and (e), 3280.404(b) and (e), 3280.405(b) and (e).
5	U	AISC 360	American Institute of Steel Construction	Specifications for Structural Steel Buildings	2010	(f)(1)	3280.304(b)(2), 3280.305(j)(1).
6	U	AISI S100	American Iron and Steel Institute	North American Specification for the Design of Cold-Formed Steel Structural Members	2012	(g)(1)	3280.304(b)(2), 3280.305(j)(1).
7	U	ANSI/AHRI 210/240 with Addenda 1 and 2	American National Standards Institute/Air Conditioning, Heating, & Refrigeration Institute	Unitary Air-Conditioning and Air-Source Heat Pump Equipment	2008	(b)(1)	3280.511(b), 3280.703(d)(22), 3280.714(a).
8	U	ANSI A135.4	American National Standards Institute	Basic Hardboard	2012	(q)(1)	3280.304(b)(3).
9	U	ANSI A135.5	American National Standards Institute	Prefinished Hardboard Paneling	2012	(q)(2)	3280.304(b)(3).
10	U	ANSI A135.6	American National Standards Institute	Hardboard Siding	2012	(q)(3)	3280.304(b)(3).
11	U	ANSI A208.1	American National Standards Institute	Particleboard	2009	(q)(4)	3280.304(b)(3).
12	U	ANSI LC 1	American National Standards Institute	Fuel Gas Piping Systems Using Corrugated Stainless Steel Tubing	2014	(r)(2)	3280.705(b)(5).
13	U	ANSI Z21.1	American National Standards Institute	Household Cooking Gas Appliances	2016	(r)(3)	3280.703(a)(13).
14	U	ANSI Z21.5.1	American National Standards Institute	Gas Clothes Dryers Volume 1, Type 1 Clothes Dryers	2015	(r)(4)	3280.703(a)(7).
15	U	ANSI Z21.10.1	American National Standards Institute	Gas Water Heaters Volume 1, Storage Water Heaters with Input Ratings of 75,000 BTU per hour or less	2014	(r)(5)	3280.703(a)(15), 3280.707(d)(2).
16	N	ANSI Z21.10.3	American National Standards Institute	Gas-fired Water Heaters Volume 3, Storage Water Heaters with Input Ratings Above 75,000 BTU per Hour, Circulating and Instantaneous	2014	(r)(6)	3280.703(a)(8).
17	U	ANSI Z21.15	American National Standards Institute	Manually Operated Gas Valves for Appliances, Appliance Connector Valves and Hose End Valves	2009	(r)(7)	3280.703(c)(4), 3280.705(c) and (l).
18	U	ANSI Z21.19	American National Standards Institute	Refrigerators Using Gas Fuel	2014	(r)(8)	3280.703(a)(14).
19	U	ANSI Z21.20	American National Standards Institute	Automatic Gas Ignitions Systems and Components	2014	(r)(9)	3280.703(d)(9).
20	U	ANSI Z21.21	American National Standards Institute	Automatic Valves for Gas Appliances	2012	(r)(10)	3280.703(d)(10).
( print page 75731)
21	U	ANSI Z21.23	American National Standards Institute	Gas Appliance Thermostats, Tenth Edition	2000	(r)(11)(i)	3280.703(d)(11).
22	U	ANSI Z21.23a	American National Standards Institute	Addenda to the Tenth Edition of Gas Appliance Thermostats	2003	(r)(11)(ii)	3280.703(d)(11).
23	U	ANSI Z21.23b	American National Standards Institute	Addenda to the Tenth Edition of ANSI Z21.23-2000 and Addenda Z21.23a-2003	2005	(r)(11)(iii)	3280.703(d)(11).
24	U	ANSI Z21.24	American National Standards Institute	Connectors for Gas Appliances	2006	(r)(12)	3280.703(c)(3).
25	U	ANSI Z21.47	American National Standards Institute	Gas Fired Central Furnaces (Except Direct Vent Systems)	2012	(r)(14)	3280.703(a)(10).
26	N	ANSI Z21.75	American National Standards Institute	Connectors for Outdoor Gas Appliances and Manufactured Homes	2007	(r)(15)	3280.703(a)(11).
27	U	ANSI Z97.1	American National Standards Institute	Standard for Safety Glazing Materials used in Buildings—Safety Performance Specifications and Methods of Test	2009	(h)(9)	3280.113(d), 3280.304(b)(6), 3280.405(d), 3280.607(b), 3280.703(d)(4).
28	U	APA D510C (replaces APA D410A)	The Engineered Wood Association (formerly the American Plywood Association)	Panel Design Specification	2012	(m)(1)	3280.304(b)(3).
29	U	APA E30V	The Engineered Wood Association (formerly the American Plywood Association)	Engineered Wood Construction Guide	2011	(m)(3)	3280.304(b)(3).
30	U	APA H815G	The Engineered Wood Association (formerly the American Plywood Association)	Design & Fabrication of All-Plywood Beams	2013	(m)(4)	3280.304(b)(3).
31	U	APA S811P	The Engineered Wood Association (formerly the American Plywood Association)	Design & Fabrication of Plywood Curved Panels	2013	(m)(5)	3280.304(b)(3).
32	U	APA S812S	The Engineered Wood Association (formerly the American Plywood Association)	Design & Fabrication of Glued Plywood Lumber Beams	2013	(m)(6)	3280.304(b)(3).
33	U	APA U813M	The Engineered Wood Association (formerly the American Plywood Association)	Design & Fabrication of Plywood-Stressed Skin Panels	2013	(m)(7)	3280.304(b)(3).
34	U	APA U814J	The Engineered Wood Association (formerly the American Plywood Association)	Design & Fabrication of Plywood Sandwich Panels	2013	(m)(8)	3280.304(b)(3).
35	N	APA Y510	The Engineered Wood Association (formerly the American Plywood Association)	Plywood Design	1997	(m)(9)	3280.304(b)(3).
( print page 75732)
36	U	ANSI/ASHRAE 62.2	American National Standards Institute/American Society of Heating, Refrigeration and Air Conditioning Engineers	Ventilation and Acceptable Indoor Air Quality in Low-Rise Residential Buildings	2013	(j)(2)	3280.103(d) and (e), 3280.703(d)(23).
37	U	ANSI/ASME B1.20.1	American National Standards Institute/American Society of Mechanical Engineers	Pipe Threads, General Purpose (Inch)	2013	(k)(18)	3280.604(c)(1), 3280.703(b)(3), 3280.705(e), 3280.706(d).
38	U	ANSI/ASME B36.10	American Society of Mechanical Engineers	Welding and Seamless Wrought Steel Pipe	2004	(k)(26)	3280.604(c)(1), 3280.703(b)(4), 3280.705(b)(1), 3280.706(b)(1).
39	U	ASTM A53/A53M	ASTM, International	Standard Specification for Pipe, Steel, Black and Hot-Dipped, Zinc Coated, Welded and Seamless	2012	(n)(1)	3280.604(c)(1), 3280.703(b)(1).
40	U	ASTM B42	ASTM, International	Standard Specification for Seamless Copper Pipe, Standard Sizes	2010	(n)(4)	3280.604(c)(2), 3280.703(c)(7).
41	U	ASTM B88	ASTM, International	Standard Specification for Seamless Copper Water Tube	2014	(n)(6)	3280.604(c)(2), 3280.703(c)(1), 3280.705(b)(3), 3280.706(b)(3).
42	U	ASTM B251	ASTM, International	Standard Specification for General Requirements for Wrought Seamless Copper-Alloy Tubes	2010	(n)(7)	3280.604(c)(2), 3280.703(c)(6).
43	U	ASTM B280	ASTM, International	Standard Specification for Seamless Copper Tube for Air Conditioning and Refrigeration Field Service	2013	(n)(8)	3280.703(c)(2), 3280.705(b)(3), 3280.706(b)(3).
44	U	ASTM C1396/C1396M	ASTM, International	Standard Specification for Gypsum Board	2014	(n)(12)	3280.304(b)(4)(i).
45	N	ASTM D3679	ASTM, International	Standard Specification for Rigid Poly (Vinyl Chloride) (PVC) Siding	2009a	(n)(21)	3280.304(b)(6), 3280.309(b)(1).
46	U	ASTM D4442	ASTM, International	Standard Test Methods for Direct Moisture Content Measurement of Wood & Wood Base Materials	2007	(n)(23)	3280.304(b)(3).
47	U	ASTM D4444	ASTM, International	Standard Test Method for Laboratory Standardization and Calibration of Hand-Held Moisture Meters	2013	(n)(24)	3280.304(b)(3).
48	N	ASTM D4756	ASTM, International	Standard Practice for Installation of Rigid Poly (Vinyl Chloride) (PVC) Siding and Soffit	2006	(n)(26)	3280.304(b)(6), 3280.309(c).
49	N	ASTM D7254	ASTM, International	Standard Specification for Polypropylene (PP) Siding	2007	(n)(28)	3280.304(b)(6), 3280.309(b)(2).
( print page 75733)
50	N	ASTM E90	ASTM, International	Standard Test Method for Laboratory Measurement of Airborne Sound Transmission Loss of Building Partitions and Elements	2009	(n)(30)	3280.115(b).
51	U	ASTM E96/E96M	ASTM, International	Standard Test Methods for Water Vapor Transmission of Materials	2013	(n)(31)	3280.504(a) and (c).
52	U	ASTM E119	ASTM, International	Standard Test Method for Fire Tests of Building Construction and Materials	2014	(n)(32)	3280.215(a) and(d)(1)(iii), 3280.304(b)(3)(xxvii), 3280.1003(a)(1).
53	N	ASTM E492	ASTM, International	Standard Test Method for Laboratory Measurement of Impact Sound Transmission Through Floor-Ceiling Assemblies Using the Tapping Machine	2009	(n)(34)	3280.115(c).
54	N	ASTM E814	ASTM, International	Standard Test Method for Fire Tests of Penetration Firestop Systems	2013	(n)(37)	3280.215(b)(1)(ii).
55	U	AWC Design Values for Joists and Rafters (formerly under AFPA)	American Wood Council (formerly American Forest & Paper Association)	Design Values for Joists and Rafters, 2012 Edition	2012	(o)(3)	3280.304(b)(3).
56	U	AWC NDS (formerly under AFPA)	American Wood Council (formerly American Forest & Paper Association)	National Design Specifications for Wood Construction	2015	(o)(1)(i)	3280.215(a), 3280.304(b)(3).
57	U	AWC NDS Supplement(formerly under AFPA)	American Wood Council (formerly American Forest & Paper Association)	NDS Supplement, Design for Wood Construction	2015	(o)(1)(ii)	3280.215(a), 3280.304(b)(3).
58	U	AWC Span Tables for Joists and Rafters (formerly under AFPA)	American Wood Council (formerly American Forest & Paper Association)	Span Tables for Joists and Rafters, 2012 Edition	2012	(o)(2)	3280.304(b)(3)(xix).
59	U	ANSI/HPVA HP-1	American National Standards Institute/Hardwood Plywood and Veneer Association (previously HPMA)	American National Standard for Hardwood and Decorative Plywood	2009	(s)(1)	3280.304(b)(3)(iv).
60	U	IAPMO TS 9	Int'l Association of Plumbing and Mechanical Officials	Standard for Gas Supply Connectors for Manufactured Homes	2003	(x)(8)	3280.703(c)(5).
61	N	ISO/IEC 17065	Int'l Organization for Standardization/Int'l Electrotechnical Commission	Conformity Assessment—Requirements for Bodies Certifying Products, Processes and Services	2012	(z)(1)	3280.403(e)(1), 3280.404(e)(2), 3280.405(e)(1).
62	U	ESR 1539	International Code Council Evaluation Service (previously known as National Evaluation Service)	Power Driven Staples and Nails	2014	(y)(1)	3280.304(b)(5)(i).
( print page 75734)
63	N	NFPA 13D	National Fire Protection Association	Standard for the Installation of Sprinkler Systems in One and Two Family Dwellings and Manufactured Homes	2010	(dd)(1)	3280.214(b), (e)(2), and (o)(3)(i).
64	U	NFPA 31	National Fire Protection Association	Installation of Oil-Burning Equipment	2011	(dd)(2)	3280.703(d)(13), 3280.707(f).
65	U	NFPA 54/ANSI Z223.1	National Fire Protection Association/American National Standards Institute	National Fuel Gas Code	2015	(dd)(3)	3280.703(d)(14).
66	U	NFPA 58	National Fire Protection Association	Standard for the Storage and Handling of Liquefied Petroleum Gas	2014	(dd)(4)	3280.703(d)(16).
67	U	NFPA 70	National Fire Protection Association/National Electric Code	National Electric Code	2014	(dd)(5)	3280.607(c), 3280.801(a) and (b), 3280.803(k), 3280.804(a) and (k), 3280.805(a), 3280.806(d), 3280.807(c), 3280.808(l) and (p), 3280.810(b), 3280.811(b).
68	U	NFPA 90B	National Fire Protection Association	Warm Air Heating and Air Conditioning Systems	2015	(dd)(6)	3280.703(d)(15).
69	U	SAE J533	Society of Automotive Engineers	Flares for Tubing	2007	(hh)(1)	3280.703(d)(17), 3280.705(f)(1).
70	N	TT-P-1536A	Federal Specification	Plumbing Fixture Setting Compound	1975	(t)(3)	3280.604(b).
71	U	TPI 1 (replaces TPI-85)	Truss Plate Institute	National Design Standard for Metal Plate Connected Wood Truss Construction	2007	(jj)(1)(I)	3280.304(b)(3)(ix).
72	U	TPI 1 Commentary and Appendices	Truss Plate Institute	2007 Commentary and Appendices	2007	(jj)(1)(ii)	3280.304(b)(3)(ix).
73	U	PS 1 Voluntary Product Standard	National Institute of Standards and Technology	Structural Plywood (with Typical APA Trademarks)	2009	(ee)(1)	3280.304(b)(3).
74	U	UL 103	Underwriters' Laboratories, Inc	Chimneys, Factory Built Residential Type & Building Heating Appliance	2010	(kk)(2)	3280.703(d)(18).
75	U	UL 109	Underwriters' Laboratories, Inc	Tube Fittings for Flammable and Combustible Fluids, Refrigeration Service, and Marine Use	2005	(kk)(3)	3280.703(d)(5).
76	U	UL 174	Underwriters' Laboratories, Inc	Household Electric Storage Tanks Water Heaters	2004	(kk)(5)	3280.703(a)(16).
77	U	UL 181	Underwriters' Laboratories, Inc	Factory Made Air Ducts & Connectors	2013	(kk)(6)	3280.702, 3280.703(d)(1). 3280.715(a) and (e).
78	U	UL 181A	Underwriters' Laboratories, Inc	Closure Systems for Use with Rigid Air Ducts and Air Connectors	2013	(kk)(7)	3280.703(d)(2), 3280.715(c).
79	N	UL 263	Underwriters' Laboratories, Inc	Fire Tests of Building Construction Materials	2014	(kk)(10)	3280.215(a) and (d)(1)(iii).
80	U	UL 268	Underwriters' Laboratories, Inc	Smoke Detectors for Fire Protective Signaling Systems	1999	(kk)(11)	3280.209(a), 3280.703(a)(1).
( print page 75735)
81	U	UL 307A	Underwriters' Laboratories, Inc	Liquid Fuel-Burning Heating Appliances for Manufactured Homes & Recreational Vehicles	2009	(kk)(12)	3280.703(a)(2), 3280.707(f).
82	U	UL 307B	Underwriters' Laboratories, Inc	Gas-Burning Appliances for Manufactured Homes & Recreational Vehicles	2009	(kk)(13)	3280.703(a)(6).
83	U	UL 441	Underwriters' Laboratories, Inc	Gas Vents	2010	(kk)(15)	3280.703(d)(12).
84	N	UL 499	Underwriters' Laboratories, Inc	Standard for Electric Heating Appliances	2014	(kk)(16)	3280.703(a)(19).
85	U	UL 569	Underwriters' Laboratories, Inc	Pigtails & Flexible Hose Connectors for LP Gas	2013	(kk)(17)	3280.703(d)(6), 3280.705(l)(1).
86	U	UL 1042	Underwriters' Laboratories, Inc	Electric Baseboard Heating Equipment	2009	(kk)(20)	3280.703(a)(4).
87	N	UL 1479	Underwriters' Laboratories, Inc	Fire Tests of Penetration Firestops	2014	(kk)(22)	3280.215(d)(1)(ii).
88	U	UL 2034	Underwriters' Laboratories, Inc	Standard for Single and Multiple Station Carbon Monoxide Alarms, Fourth Edition	2016	(kk)(25)	3280.209(a), 3280.211(a), 3280.703(a)(18).
89	N	UL 60335-2-40	Underwriters' Laboratories, Inc	Standard for Household and Similar Electrical Appliances—Safety, Part 2-34: Particular Requirements for Motor-Compressors	2012	(kk)(26)	3280.703(a)(16).
90	U	WDMA I.S.4	Window and Door Manufacturers Association	Industry Specification for Preservative Treatment for Millwork	2009	(mm)(1)	3280.405(c).

V. Findings and Certifications

Regulatory Review—Executive Orders 12866, 13563, and 14094

Under Executive Order 12866 (Regulatory Planning and Review), a determination must be made whether a regulatory action is significant and, therefore, subject to review by the Office of Management and Budget (OMB) in accordance with the requirements of the order. Executive Order 13563 (Improving Regulations and Regulatory Review) directs executive agencies to analyze regulations that are “outmoded, ineffective, insufficient, or excessively burdensome, and to modify, streamline, expand, or repeal them in accordance with what has been learned.” Executive Order 13563 also directs that, where relevant, feasible, and consistent with regulatory objectives, and to the extent permitted by law, agencies are to identify and consider regulatory approaches that reduce burdens and maintain flexibility and freedom of choice for the public. Executive Order 14094 entitled “Modernizing Regulatory Review” (hereinafter referred to as the “Modernizing E.O.”) amends section 3(f) of Executive Order 12866, among other things.

The Office of Management and Budget (OMB) reviewed this rule under Executive Order 12866 (entitled “Regulatory Planning and Review”). OMB determined that this rule is a “significant regulatory action” as defined in section 3(f)(1) of the Order. Any changes made to the rule subsequent to its submission to OMB are identified in the docket file, which is available for public inspection at either www.regulations.gov or in the Regulations Division, Office of the General Counsel, 451 7th Street SW, Washington, DC 20410-0500. HUD strongly encourages the public to view the docket file at www.regulations.gov. Due to security measures at the HUD Headquarters building, please schedule an appointment to review the docket file by calling the Regulations Division at 202-402-3055 (this is not a toll-free number). HUD welcomes and is prepared to receive calls from individuals who are deaf or hard of hearing, as well as individuals with speech or communication disabilities. To learn more about how to make an accessible telephone call, please visit: https://www.fcc.gov/​consumers/​guides/​telecommunications-relay-service-trs.

Paperwork Reduction Act

The information collection requirements contained in this final rule have been approved by the Office of Management and Budget (OMB) under the Paperwork Reduction Act of 1995 (44 U.S.C. 3501-3520). In accordance with the Paperwork Reduction Act, an agency may not conduct or sponsor, and a person is not required to respond to, a collection of information unless the collection displays a valid control number. OMB has issued HUD the control number 2502-0253 for the information collection requirements under the current Manufactured ( print page 75736) Housing Construction and Safety Standards Program.

This final rule revises the technical standards within the MHCSS that address the fourth and fifth sets of recommendations made to HUD by the MHCC. The revisions include a large number of updated standards incorporated by reference, which will bring the MHCSS in line with more current industry standards, improve the quality and safety of manufactured homes constructed, and allow for expanded, innovative opportunities to use of manufactured housing, such as multi-dwelling unit manufactured homes. The revisions will eliminate the need for manufacturers to obtain special approvals from HUD for some construction features and options, including tankless water heaters, home designs with peak flip roof assemblies, and accessible shower compartments. This will cause the Design Approval Primary Inspection Agencies (DAPIAs) to subsequently experience a reduction in requests to review AC submissions and issue fewer concurrence correspondences to OMHP.

The overall reporting and recordkeeping burden for collection number 2502-0253 addressed in this final rule is estimated as follows:

Number of respondents: 196.

Number of responses: 197,014.

Frequency of response: 1,005.

Average hours per response: 1.2.

Total estimated burden: 238,994.

Unfunded Mandates Reform Act

Title II of the Unfunded Mandates Reform Act of 1995 (2 U.S.C. 1531-1538) establishes requirements for Federal agencies to assess the effects of their regulatory actions on State, local, and Tribal governments and the private sector. This rule will not impose any Federal mandates on any State, local, or Tribal government or the private sector within the meaning of the Unfunded Mandates Reform Act of 1995.

Environmental Review

A Finding of No Significant Impact with respect to the environment was made at the proposed rule stage in accordance with HUD regulations at 24 CFR part 50, which implement section 102(2)(C) of the National Environmental Policy Act of 1969 (42 U.S.C. 4332(2)(C)). The Finding of No Significant Impact remains applicable and is available for review in the docket for this rule on www.regulations.gov.

Regulatory Flexibility Act

The Regulatory Flexibility Act (RFA) (5 U.S.C. 601 et seq.) requires an agency to conduct a regulatory flexibility analysis of any rule subject to notice and comment rulemaking requirements, unless the agency certifies that the rule will not have a significant economic impact on a substantial number of small entities.

The final rule regulates establishments primarily engaged in making manufactured homes (NAICS 321991). The Small Business Administration's size standards define an establishment primarily engaged in making manufactured homes as small if it does not exceed 1250 employees. 13 CFR 121.201. Of the 242 firms included under this NAICS definition, approximately 37 produce manufactured homes subject to the MHCSS. Of the 37 manufacturers subject to the MHCSS, 34 are considered small businesses based on the threshold of 1250 employees or less. The final rule would apply to all manufacturers. The rule would, thus, affect a substantial number of small entities.

HUD has determined, however, that this rule would not have a significant economic impact on a substantial number of small entities. As discussed in the economic impact analysis prepared for this rule, most of the revisions enacted by this rule would not affect costs of manufacturers, large or small, and provide benefit to homeowners. Furthermore, seven code changes enacted by this rule would affect the cost of design, production, or installation of manufactured homes by decreasing the costs of manufacturing.

This rule also eliminates the need for manufacturers to prepare and submit an Alternate Construction (AC) letter in four circumstances, providing all manufacturers, large and small, additional cost savings and increased flexibility in design. The changes provide additional options and increased flexibility in the four circumstances, which include design of accessible shower compartments, multi-dwelling unit manufactured homes, and revised floor plans. Savings from the reduced administrative burden associated with AC letter application and compliance is $771,000 per production year.

Two revisions increase production costs. The change to 24 CFR 3280.307(f) requires that the exterior wall envelope of a manufactured home contain a water resistive barrier behind the exterior cladding, as well as have a means of draining water that enters the assembly. The water resistant barriers, which are common in large manufactured homes and less common in small manufactured homes, would increase the upfront production costs. Based on HUD's industry knowledge, small businesses produce custom or larger manufactured homes and were much likelier to have incorporated water resistant barriers in their products prior to this rule. This means the costs of water resistive barriers have largely been incorporated into existing manufacturing costs for small businesses compared to large businesses.

There are no significant alternatives to the water resistive barrier standard. This is because no alternatives reduce the fire hazard risks in manufactured homes as effectively as this water resistant barrier standard while maintaining a similar cost structure. Further, no similar standards were considered by the MHCC, which includes numerous industry representatives and recommends incorporation of the standards, or recommended to HUD. This lack of recommendation divests HUD of authority to implement an alternative standard.

The rule also updates the AWC National Design Specification for Wood Construction reference from the 2001 to 2015 edition. This change, which amends the design values for the grade of wood needed for structural elements, was recommended by the MHCC after the Southern Pine Inspection Bureau (SPIB), an independent non-profit industry inspection agency, discovered that the strength of southern pine lumber had decreased and that previous standards were insufficient to protect against structural failure. The recommendations from the SPIB provide that the most effective method to avoid structural failure is changing the values. This led the manufactured housing industry, including small manufacturers, to implement the 2015 edition of this standard in their production process. Further, the MHCC did not consider an alternative or provide HUD with a recommendation and this rule codifies a standard that is broadly used in the industry.

Overall, the regulatory impact analysis for this rule concluded that the decreased costs of design, production and installation of manufactured homes would reduce burden and result in an overall positive economic impact on manufacturers and consumers. The regulatory impact analysis also provides that the rule would produce net benefits ranging from $160.4 million to $334.4 million per production year. HUD has considered the effects of changes between the proposed rule and this final rule and finds that the regulatory impact analysis has changed minimally.

HUD solicited comments from the public at the proposed rule stage on whether the rule would impose a significant economic impact on a ( print page 75737) substantial number of small entities. HUD received no comments suggesting that it would impose a significant economic impact on a substantial number of small entities. A handful of comments asserted the final rule would impose increased burdens on manufacturers in general, but the comments did not assert or suggest the burdens were economically significant or disproportionately impacted small businesses.

Accordingly, the undersigned certifies that the rule will not have a significant economic impact on a substantial number of small entities.

Executive Order 13132, Federalism

Executive Order 13132 (entitled “Federalism”) prohibits, to the extent practicable and permitted by law, an agency from promulgating a regulation that has federalism implications and either imposes substantial direct compliance costs on State and local governments and is not required by statute, or preempts State law, unless the relevant requirements of section 6 of the Executive Order are met. This rule does not have federalism implications and does not impose substantial direct compliance costs on State and local governments or preempt State law within the meaning of the Executive order.

List of Subjects

24 CFR Part 3280

• Fire prevention
• Housing standards
• Incorporation by reference

24 CFR Part 3282

• Administrative practice and procedure
• Consumer protection
• Intergovernmental relations
• Investigations
• Manufactured homes
• Reporting and recordkeeping requirements
• Warranties

24 CFR Part 3285

• Housing standards
• Manufactured homes

24 CFR Part 3286

• Administrative practice and procedure
• Consumer protection
• Intergovernmental relations
• Manufactured homes, reporting and recordkeeping requirements

Accordingly, for the reasons discussed in the preamble, HUD amends 24 CFR parts 3280, 3282, 3285, and 3286 to read as follows:

PART 3280—MANUFACTURED HOME CONSTRUCTION AND SAFETY STANDARDS

1. The authority citation for part 3280 continues to read as follows:

Authority: 15 U.S.C. 2697, 42 U.S.C. 3535(d), 5403, and 5424.

2. Amend § 3280.2 by:

a. Revising the definition for “Certification label”;

b. Adding, in alphabetical order, the definition for “Dwelling”;

c. Revising the definition for “Dwelling unit”; and

d. Adding, in alphabetical order, the definitions for “Multipurpose fire sprinkler system”, “Stand-alone fire sprinkler system”, and “Water resistive barrier”.

The revisions and additions read as follows:

§ 3280.

2 Definitions.

* * * * *

Certification label means the approved form of certification by the manufacturer that, under § 3280.11, is permanently affixed to each transportable section of each manufactured home manufactured for sale in the United States.

Dwelling means any structure that contains one to a maximum of four dwelling units, designed to be permanently occupied for residential living purposes.

Dwelling unit means a single unit that provides complete independent living facilities for one or more persons, where the occupancy is primarily permanent in nature, including permanent provisions for separate living, sleeping, cooking, eating, and sanitation.

* * * * *

Multipurpose fire sprinkler system means a system that supplies domestic water to both plumbing fixtures and fire sprinklers.

* * * * *

Stand-alone fire sprinkler system means a system that is separate and independent from the water distribution system.

* * * * *

Water resistive barrier means a material behind the exterior wall covering that is intended to prevent liquid water that has penetrated behind the exterior covering from intruding further into the exterior wall assembly.

* * * * *

3. Revise and republish § 3280.4 to read as follows:

§ 3280.4

Incorporation by reference.

(a)(1) Certain material is incorporated by reference in this part with the approval of the Director of the Federal Register in accordance with 5 U.S.C. 552(a) and 1 CFR part 51. To enforce any edition other than that specified in this section, the U.S. Department of Housing and Urban Development (Department) must publish a document in the Federal Register and the material must be available to the public. All approved incorporation by reference (IBR) material is available for inspection at the Department and at the National Archives and Records Administration (NARA). Contact the Department at: Office of Manufactured Housing Programs, 451 Seventh Street SW, Washington, DC 20410; email [e-mail]; [phone]. For information on the availability of this material at NARA, visit www.archives.gov/​federal-register/​cfr/​ibr-locations or email [e-mail].

(2) The IBR material may be obtained from the sources in this paragraph (a)(2) or from one or more private resellers listed in this paragraph (a)(2). For material that is no longer commercially available, contact the Office of Manufactured Housing Programs (see paragraph (a)(1) of this section).

(i) Accuris Standards Store, phone: [phone]; website: https://store.accuristech.com.

(ii) American National Standards Institute (see paragraph (h) of this section).

(iii) EverySpec LLC, 710 Lake Louise Ct., Gibsonia, PA 10544; website: http://everyspec.com. (Government and military standards only.)

(iv) GlobalSpec, 257 Fuller Road, Suite NFE 1100, Albany, NY 12203-3621; phone: [phone]; website: https://standards.globalspec.com.

(v) Nimonik Document Center, 401 Roland Way, Suite 224, Oakland, CA, 94624; phone [phone]; email: [e-mail]; website: www.document-center.com.

(b) Air Conditioning, Heating & Refrigeration Institute (AHRI), 2311 Wilson Blvd., Suite 400, Arlington, VA 22201; telephone: [phone]; fax: [phone]; website: www.ahrinet.org.

(1) ANSI/AHRI Standard 210/240-2008 with Addenda 1 and 2, 2008 Standard for Performance Rating of Unitary Air-Conditioning and Air-Source Heat Pump Equipment, ANSI-approved December 2012; IBR approved for §§ 3280.511(b); 3280.703(d); 3280.714(a).

(2) [Reserved]

(c) Aluminum Association (AA), 1525 Wilson Blvd., Suite 600, Arlington, VA 22209; telephone: [phone]; fax: ( print page 75738) 703-358-3921; website: www.aluminum.org.

(1) Aluminum Design Manual, Specifications and Guidelines for Aluminum Structures, Part 1-A, Sixth Edition, October 1994; IBR approved for § 3280.304(b).

(2) Aluminum Design Manual, Specifications and Guidelines for Aluminum Structures, Part 1-B, First Edition, October 1994; IBR approved for § 3280.304(b).

(d) American Forest and Paper Association (AFPA), 1101 K Street NW, Suite 700, Washington, DC 20005; telephone: [phone]; website: www.afandpa.org.

(1) AFPA, Wood Structural Design Data, 1986 Edition with 1992 Revisions; IBR approved for § 3280.304(b).

(2) [Reserved]

(e) American Gas Association (AGA), 400 North Capitol Street NW, Washington, DC 20001: telephone: [phone]; website: www.aga.org.

(1) AGA No. 3-87, Requirements for Gas Connectors for Connection of Fixed Appliances for Outdoor Installation, Park Trailers, and Manufactured (Mobile) Homes to the Gas Supply; IBR approved for § 3280.703(d).

(2) [Reserved]

(f) American Institute of Steel Construction (AISC), 130 East Randolph Street, Suite 2000, Chicago, IL 60601-6219; telephone: [phone]; fax: [phone]; website: www.aisc.org.

(1) ANSI/AISC 360-10, Specification for Structural Steel Buildings, Second Printing: February 2012 (AISC 360-10); IBR approved for §§ 3280.304(b); 3280.305(j).

(2) [Reserved]

(g) American Iron and Steel Institute (AISI), 25 Massachusetts Avenue NW, Suite 800, Washington, DC 20001; telephone: [phone]; website: www.steel.org.

(1) AISI S100-12, North American Specification for the Design of Cold-Formed Steel Structural Members, 2012 Edition, 2nd Printing—June 2014, including AISI S100-12-E3 errata dated December 10, 2014; IBR approved for §§ 3280.304(b); 3280.305(j).

(2) [Reserved]

(h) American National Standards Institute (ANSI), 25 West 43rd Street, 4th Floor, New York, NY 10018; telephone: [phone]; fax: [phone]; website: www.ansi.org.

(1) ANSI A112.14.1-1975, Backflow Valves; IBR approved for § 3280.604(c).

(2) ANSI A112.19.5-1979, Trim for Water Closet, Bowls, Tanks, and Urinals; IBR approved for § 3280.604(c).

(3) ANSI/AITC A190.1-1992, For wood products—Structural Glued Laminated Timber; IBR approved for § 3280.304(b).

(4) ANSI A208.2-2002, Medium Density Fiberboard (MDF) For Interior Applications, approved May 13, 2002; IBR approved for § 3280.304(b).

(5) ANSI B16.18-1984, Cast Copper Alloy Solder-Joint Pressure Fittings; IBR approved for § 3280.604(c).

(6) ANSI C72.1-1972, section 4.3.1, Household Automatic Electric Storage Type Water Heaters; IBR approved for § 3280.707(d).

(7) ANSI Z21.22-1999, Relief Valves for Hot Water Supply Systems; IBR approved for §§ 3280.604(c); 3280.703(d).

(8) ANSI Z34.1-1993, Third-Party Certification Programs for Products, Processes, and Services; IBR approved for §§ 3280.403(e); 3280.405(e).

(9) ANSI Z97.1-2009 ^e , American National Standard for safety glazing materials used in buildings—safety performance specifications and methods of test, approved November 2009; IBR approved for §§ 3280.113(d); 3280.304(b); 3280.403(d); 3280.604(c); 3280.607(b); 3280.703(d).

(10) ANSI Z124.1-1987, Plastic Bathtub Units with Addendum Z124.1a-1990 and Z124.1b-1991; IBR approved for § 3280.604(c).

(11) ANSI Z124.2-1987, Plastic Shower Receptors and Shower Stalls with Addendum Z124.2a-1990; IBR approved for § 3280.604(c).

(12) ANSI Z124.3-1986, Plastic Lavatories with Addendum Z124.3a-1990; IBR approved for § 3280.604(c).

(13) ANSI Z124.4-1986, Plastic Water Closets, Bowls, and Tanks with Addenda Z124.4a-1990; IBR approved for § 3280.604(c).

(14) ANSI Z124.5-1997, Plastic Toilet (Water Closets) Seats; IBR approved for § 3280.604(c).

(15) ANSI Z124.7-1997, Prefabricated Plastic Spa Shells; IBR approved for § 3280.604(c).

(16) ANSI Z-124.9-1994, Plastic Urinal Fixtures; IBR approved for § 3280.604(c).

(i) American Society of Civil Engineers (ASCE), 1801 Alexander Bell Drive, Reston, VA 20191; telephone: [phone]; website: www.asce.org.

(1) ANSI/ASCE 7-88, Minimum Design Loads for Buildings and Other Structures, IBR approved for §§ 3280.5(f); 3280.304(b); 3280.305(c).

(2) SEI/ASCE 8-02, Specification for the Design of Cold-Formed Stainless Steel Structural Members, 2002; IBR approved for §§ 3280.304(b); 3280.305(j).

(3) ASCE 19-96, Structural Applications of Steel Cables for Buildings; IBR approved for § 3280.304(b).

(j) American Society of Heating, Refrigeration and Air Conditioning Engineers (ASHRAE), 1791 Tullie Circle NE, Atlanta, GA 30329; telephone: [phone]; fax: [phone]; website: www.ashrae.org/​home/​.

(1) 1997 ASHRAE Handbook of Fundamentals, chapters 22 through 27, (except for the following parts of this standard that are not incorporated by reference: 23.1 Steel Frame Construction; 23.2 Masonry Construction; 23.3 Foundations and Floor Systems; 23.15 Pipes; 23.17 Tanks, Vessels, and Equipment; 23.18 Refrigerated Rooms and Buildings; 24.18 Mechanical and Industrial Systems; 25.19 Commercial Building Envelope Leakage; 27.9 Calculation of Heat Loss from Crawl Spaces), Inch-Pound Edition, 1997; IBR approved for §§ 3280.508(a) and (e); 3280.511(a).

(2) ANSI/ASHRAE Standard 62.2-2013, Ventilation and Acceptable Indoor Air Quality in Low-Rise Residential Buildings, approved January 30, 2013 (ANSI/ASHRAE 62.2); IBR approved for §§ 3280.103(d) and (e); 3280.703(d).

(k) American Society of Mechanical Engineers (ASME), Two Park Avenue, New York, NY 10016-5990; telephone: [phone]; website: www.asme.org/​.

(1) ASME A112.1.2-1991, Air Gaps in Plumbing Systems; IBR approved for § 3280.604(c).

(2) ANSI/ASME A112.4.1-1993, Water Heater Relief Valve Drain Tubes; IBR approved for § 3280.604(c).

(3) ANSI/ASME A112.4.3-1999, Plastic Fittings for Connecting Water Closets to the Sanitary Drainage System; IBR approved for § 3280.604(c).

(4) ASME/ANSI A112.18.1M-1989, Plumbing Fixture Fittings; IBR approved for § 3280.604(c).

(5) ASME A112.18.3M-1996, Performance Requirements for Backflow Protection Devices and Systems in Plumbing Fixture Fittings; IBR approved for § 3280.604(c).

(6) ASME A112.18.6-1999, Flexible Water Connectors; IBR approved for § 3280.604(c).

(7) ASME A112.18.7-1999, Deck Mounted Bath/Shower Transfer Valves with Integral Backflow Protection; IBR approved for § 3280.604(c).

(8) ANSI/ASME A112.19.1M-1987, Enameled Cast Iron Plumbing Fixtures; IBR approved for § 3280.604(c).

(9) ANSI/ASME A112.19.2(M)-1990, Vitreous China Plumbing Fixtures; IBR approved for § 3280.604(c).

(10) ANSI/ASME A112.19.3M-1987, Stainless Steel Plumbing Fixtures (Designed for Residential Use); IBR approved for § 3280.604(c).

(11) ANSI/ASME A112.19.4(M)-1984, Porcelain Enameled Formed Steel ( print page 75739) Plumbing Fixtures; IBR approved for § 3280.604(c).

(12) ASME A112.19.6-1995, Hydraulic Performance Requirements for Water Closets and Urinals; IBR approved for § 3280.604(c).

(13) ASME/ANSI A112.19.7M-1987, Whirlpool Bathtub Appliances; IBR approved for § 3280.604(c).

(14) ASME/ANSI A112.19.8M-1989, Suction Fittings for Use in Swimming Pools, Wading Pools, Spas, Hot Tubs, and Whirlpool Bathtub Appliances; IBR approved for § 3280.604(c).

(15) ASME A112.19.9M-1991, Non-Vitreous Ceramic Plumbing Fixtures; IBR approved for § 3280.604(c).

(16) ASME A112.19.10-1994, Dual Flush Devices for Water Closets; IBR approved for § 3280.604(c).

(17) ANSI/ASME A112.21.3M-1985, Hydrants for Utility and Maintenance Use; IBR approved for § 3280.604(c).

(18) ANSI/ASME B1.20.1-2013, Pipe Threads, General Purpose (Inch), reaffirmed 2018; IBR approved for §§ 3280.604(c); 3280.703(b); 3280.705(e); 3280.706(d).

(19) ANSI/ASME B16.3-1992, Malleable Iron Threaded Fittings; IBR approved for § 3280.604(c).

(20) ANSI/ASME B16.4-1992, Gray Iron Threaded Fittings; IBR approved for § 3280.604(c).

(21) ANSI/ASME B16.15-1985, Cast Bronze Threaded Fittings, Classes 125 and 250; IBR approved for § 3280.604(c).

(22) ASME/ANSI B16.22-1989, Wrought-Copper and Copper Alloy Solder-Joint Pressure Fitting; IBR approved for § 3280.604(c).

(23) ASME B16.23-1992, Cast Copper Alloy Solder-Joint Drainage Fittings-DWV; IBR approved for § 3280.604(c).

(24) ASME/ANSI B16.26-1988, Cast Copper Alloy Fittings for Flared Copper Tubes; IBR approved for § 3280.604(c).

(25) ASME/ANSI B16.29-1986, Wrought Copper and Wrought Copper Alloy Solder-Joint Drainage Fittings-DWV; IBR approved for § 3280.604(c).

(26) ANSI/ASME B36.10-2004, Welded and Seamless Wrought Steel Pipe, ANSI-approved June 23, 2004; IBR approved for §§ 3280.604(c); 3280.703(b), 3280.705(b); 3280.706(b).

(l) American Society of Sanitary Engineering (ASSE), 901 Canterbury, Suite A, Westlake, OH 44145; telephone: [phone]; fax: [phone]; website: www.asse-plumbing.org.

(1) ASSE 1001, Performance Requirements for Pipe Applied Atmospheric Type Vacuum Breakers, ANSI-approved 1990; IBR approved for § 3280.604(c).

(2) ASSE 1002 (ANSI/ASSE-1979), Performance Requirements for Water Closet Flush Tank Fill Valves (Ballcocks), Revision 5, 1986; IBR approved for § 3280.604(c).

(3) ASSE 1006, Plumbing Requirements for Residential Use (Household) Dishwashers, ASSE/ANSI-1986; IBR approved for § 3280.604(c).

(4) ASSE 1007-1986, Performance Requirements for Home Laundry Equipment; IBR approved for § 3280.604(c).

(5) ASSE 1008-1986, Performance Requirements for Household Food Waste Disposer Units; IBR approved for § 3280.604(c).

(6) ASSE 1011-1981, Performance Requirements for Hose Connection Vacuum Breakers, ANSI-approved 1982; IBR approved for § 3280.604(c).

(7) ASSE 1014-1989, Performance Requirements for Hand-held Showers, ANSI-approved 1990; IBR approved for § 3280.604(c).

(8) ASSE 1016-2005, Performance Requirements for Automatic Compensating Values for Individual Shower and Tub/Shower Combinations, approved January 2005; IBR approved for §§ 3280.604(c); 3280.607(b).

(9) ASSE 1017-1986, Performance Requirements for Temperature Activated Mixing Valves for Primary Domestic Use, 1986; IBR approved for § 3280.604(c).

(10) ANSI/ASSE 1019-1978, Performance Requirements for Wall Hydrants, Frost Proof Automatic Draining, Anti-Backflow Types, 1978; IBR approved for § 3280.604(c).

(11) ASSE 1023, Performance Requirements for Hot Water Dispensers, Household Storage Type Electrical, ANSI/ASSE-1979; IBR approved for § 3280.604(c).

(12) ASSE 1025, Performance Requirements for Diverters for Plumbing Faucets with Hose Spray, Anti-Siphon Type, Residential Applications, ANSI/ASSE-1978; IBR approved for § 3280.604(c).

(13) ASSE 1037-1990, Performance Requirements for Pressurized Flushing Devices (Flushometers) for Plumbing Fixtures, ANSI-approved 1990; IBR approved for § 3280.604(c).

(14) ASSE 1051, Performance Requirements for Air Admittance Valves for Plumbing Drainage Systems—Fixture and Branch Devices Revised 1996, ANSI-approved 1998; IBR approved for § 3280.604(c).

(15) ASSE 1070-2004, Performance Requirements for Water Temperature Limiting Devices, 2004; IBR approved for §§ 3280.604(c); 3280.607(b).

(m) APA—The Engineered Wood Association (APA) (formerly the American Plywood Association), 7011 South 19th Street, Tacoma, WA 98411; telephone: [phone]; fax: [phone]; website: www.apawood.org.

(1) APA D510C, Panel Design Specification, copyright 2012; IBR approved for § 3280.304(b).

(2) APA E30P-1996, APA Design/Construction Guide, Residential and Commercial Structures; IBR approved for § 3280.304(b).

(3) APA E30V, Engineered Wood Construction Guide, copyright 2011; IBR approved for § 3280.304(b).

(4) APA H815G, Plywood Design Specification Supplement 5-12, Design and Fabrication of All-Plywood Beams, December 2013; IBR approved for § 3280.304(b).

(5) APA S811P, Plywood Design Specification Supplement 1-12, Design and Fabrication of Plywood Curved Panels, December 2013; IBR approved for § 3280.304(b).

(6) APA S812S, Plywood Design Specification Supplement 2-12, Design and Fabrication of Glued Plywood-Lumber Beams, December 2013; IBR approved for § 3280.304(b).

(7) APA U813M, Plywood Design Specification Supplement 3-12, Design and Fabrication of Plywood Stressed-Skin Panels, December 2013; IBR approved for § 3280.304(b).

(8) APA U814J, Plywood Design Specification Supplement 4-12, Design and Fabrication of Plywood Sandwiched Panels, December 2013; IBR approved for § 3280.304(b).

(9) APA Y510, Plywood Design, January 1997; IBR approved for § 3280.304(b).

(n) ASTM, International (ASTM), 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959; telephone:[phone] (USA & Canada); fax: [phone]; website: www.astm.org.

(1) ASTM A53/A53M-12, Standard Specification for Pipe, Steel, Black and Hot-Dipped, Zinc-Coated, Welded and Seamless, approved March 1, 2012; IBR approved for §§ 3280.604(c); 3280.703(b).

(2) ASTM A74-92, Standard Specification for Cast Iron Soil Pipe and Fittings, 1992; IBR approved for § 3280.604(c).

(3) ASTM A539-99, Standard Specification for Electric-Resistance-Welded Coiled Steel Tubing for Gas and Fuel Oil Lines, 1999; IBR approved for §§ 3280.703(b); 3280.705(b); 3280.706(b).

(4) ASTM B42-10, Standard Specification for Seamless Copper Pipe, Standard Sizes, approved October 1, 2010; IBR approved for §§ 3280.604(c); 3280.703(c).

(5) ASTM B43-91, Standard Specification for Seamless Red Brass Pipe, Standard Sizes, 1991; IBR ( print page 75740) approved for §§ 3280.604(c); 3280.705(b).

(6) ASTM B88-14, Standard Specification for Seamless Copper Water Tube, approved September 1, 2014; IBR approved for §§ 3280.604(c); 3280.703(c); 3280.705(b); 3280.706(b).

(7) ASTM B251-10, Standard Specification for General Requirements for Wrought Seamless Copper and Copper-Alloy Tube, approved October 1, 2010; IBR approved for §§ 3280.604(c); 3280.703(c).

(8) ASTM B280-13, Standard Specification for Seamless Copper Tube for Air Conditioning and Refrigeration Field Service, approved April 1, 2013; IBR approved for §§ 3280.703(c); 3280.705(b); 3280.706(b).

(9) ASTM B306-92, Standard Specification for Copper Drainage Tube (DWV), 1992; IBR approved for § 3280.604(c).

(10) ASTM C564-97, Standard Specification for Rubber Gaskets for Case Iron Soil Pipe and Fittings, approved December 10, 1997; IBR approved for §§ 3280.604(c); 3280.611(d).

(11) ASTM C920-02, Standard Specification for Elastomeric Joint Sealants, approved January 10, 2002; IBR approved for § 3280.611(d).

(12) ASTM C1396/C1396M-14a, Standard Specification for Gypsum Board, approved October 1, 2014; IBR approved for § 3280.304(b).

(13) ASTM D781-68 (Reapproved 1973), Standard Test Methods for Puncture and Stiffness of Paperboard, and Corrugated and Solid Fiberboard, 1973; IBR approved for §§ 3280.304(b); 3280.305(g).

(14) ASTM D2235-88, Standard Specification for Solvent Cement for Acrylonitrile-Butadiene-Styrene (ABS) Plastic Pipe and Fittings, 1988; IBR approved for § 3280.604(c).

(15) ASTM D2564-91a, Standard Specification for Solvent Cements for Poly (Vinyl Chloride) (PVC) Plastic Piping Systems, 1991; IBR approved for § 3280.604(c).

(16) ASTM D2661-91, Standard Specification for Acrylonitrile-Butadiene-Styrene (ABS) Schedule 40 Plastic Drain, Waste, and Vent Pipe and Fittings, 1991; IBR approved for § 3280.604(c).

(17) ASTM D2665-91b, Standard Specification for Poly (Vinyl Chloride) (PVC) Plastic Drain, Waste, and Vent Pipe and Fittings, 1991; IBR approved for § 3280.604(c).

(18) ASTM D2846-92, Standard Specification for Chlorinated Poly (Vinyl Chloride) (CPVC) Plastic Hot- and Cold-Water Distribution Systems, 1992; IBR approved for § 3280.604(c).

(19) ASTM D3309-92a, Standard Specification for Polybutylene (PB) Plastic Hot- and Cold-Water Distribution Systems, 1992; IBR approved for § 3280.604(c).

(20) ASTM D3311-92, Standard Specification for Drain, Waste, and Vent (DWV) Plastic Fittings Patterns, 1992; IBR approved for § 3280.604(c).

(21) ASTM D3679-09a, Standard Specification for Rigid Poly (Vinyl Chloride) (PVC) Siding, approved November 1, 2009; IBR approved for §§ 3280.304(b); 3280.309(b).

(22) ASTM D3953-97, Standard Specification for Strapping, Flat Steel, and Seals, approved April 10, 1997; IBR approved for §§ 3280.304(b); 3280.306(g).

(23) ASTM D4442-07, Standard Test Methods for Direct Moisture Content Measurement of Wood and Wood-Base Materials, approved November 15, 2007; IBR approved for § 3280.304(b).

(24) ASTM D4444-13, Standard Test Method for Laboratory Standardization and Calibration of Hand-Held Moisture Meters, approved April 1, 2013; IBR approved for § 3280.304(b).

(25) ASTM D4635-01, Standard Specification for Polyethylene Films Made from Low-Density Polyethylene for General Use and Packaging Applications, approved June 10, 2001; IBR approved for § 3280.611(d).

(26) ASTM D4756-06, Standard Practice for Installation of Rigid Poly(Vinyl Chloride) (PVC) Siding and Soffit, approved April 1, 2006; IBR approved for §§ 3280.304(b); 3280.309(c).

(27) ASTM D6007-14, Standard Test Method for Determining Formaldehyde Concentrations in Air from Wood Products Using a Small Air Chamber, approved October 1, 2014; IBR approved for § 3280.406(b).

(28) ASTM D7254-07, Standard Specification for Polypropylene (PP) Siding, January 1, 2007; IBR approved for §§ 3280.304(b); 3280.309(c).

(29) ASTM E84-01, Standard Test Method for Surface Burning Characteristics of Building Materials, 2001; IBR approved for § 3280.203(a).

(30) ASTM E90-09, Standard Test Method for Laboratory Measurement of Airborne Sound Transmission Loss of Building Partitions and Elements, approved July 1, 2009; IBR approved for § 3280.115(b).

(31) ASTM E96/E96M-13, Standard Test Methods for Water Vapor Transmission of Materials, approved November 1, 2013; IBR approved for § 3280.504(a) and (c).

(32) ASTM E119-14, Standard Test Methods for Fire Tests of Building Construction and Materials, approved October 1, 2014; IBR approved for §§ 3280.215(a) and (d); 3280.304(b); 3280.1003(a).

(33) ASTM E162-94, Standard Test Method for Surface Flammability of Materials Using a Radiant Heat Energy Source, 1994; IBR approved for § 3280.203(a).

(34) ASTM E492-09, Standard Test Method for Laboratory Measurement of Impact Sound Transmission Through Floor-Ceiling Assemblies Using the Tapping Machine, approved April 1, 2009; IBR approved for § 3280.115(b).

(35) ASTM E773-97, Standard Test Methods for Accelerated Weathering of Sealed Insulating Glass Units, 1997; IBR approved for § 3280.403(d).

(36) ASTM E774-97, Standard Specification for the Classification of the Durability of Sealed Insulating Glass Units, 1997; IBR approved for § 3280.403(d).

(37) ASTM E814-13, Standard Test Method for Fire Tests of Penetration Firestop Systems, approved November 1, 2013; IBR approved for § 3280.215(d).

(38) ASTM E1333-14, Standard Test Method for Determining Formaldehyde Concentrations in Air and Emission Rates from Wood Products Using a Large Air Chamber, approved October 1, 2014; IBR approved for § 3280.406(b).

(39) ASTM F628-91, Standard Specification for Acrylonitrile-Butadiene-Styrene (ABS) Schedule 40, Plastic Drain, Waste, and Vent Pipe with a Cellular Core, 1991; IBR approved for § 3280.604(c).

(40) ASTM F876-10, Standard Specification for Crosslinked Polyethylene (PEX) Tubing, approved February 10, 2010; IBR approved for § 3280.604(c).

(41) ASTM F877-07, Standard Specification for Crosslinked Polyethylene (PEX) Plastic Hot- and Cold-Water Distribution Systems, approved February 1, 2007; IBR approved for § 3280.604(c).

(o) American Wood Council (AWC), 222 Catoctin Circle SE, Suite 201, Leesburg, VA 20175; telephone: [phone]; website: www.awc.org.

(1) AWC NDS-2015, National Design Specifications for Wood Construction with Supplement; IBR approved for §§ 3280.215(a); 3280.304(b):

(i) ANSI/AWC NDS-2015, 2015 Edition, ANSI-approved September 30, 2014; and

(ii) NDS Supplement, Design Values for Wood Construction, 2015 Edition, November 2014.

(2) Span Tables for Joists and Rafters: American Softwood Lumber Standard (PS 20-10) Sizes, 2012 Edition (AWC-2012—Span Tables for Joists and Rafters); IBR approved for § 3280.304(b). ( print page 75741)

(3) Design Values for Joists and Rafters, Supplement to Span Tables for Joists and Rafters (2012 Edition), March 2013 (AWC-2012 Design Values for Joists and Rafters); IBR approved for § 3280.304(b).

(p) Cast Iron Soil Pipe Institute (CISPI), 1064 Delaware Avenue SE, Atlanta, GA 30316; telephone: [phone]; fax: [phone]; website: www.cispi.org/​.

(1) CISPI-301-90, Standard Specification for Hubless Cast Iron Soil Pipe and Fittings for Sanitary and Storm Drain, Waste, and Vent Piping Applications; IBR approved for § 3280.604(c).

(2) CISPI-HSN-85, Specification for Neoprene Rubber Gaskets for HUB and Spigot Cast Iron Soil Pipe and Fittings; IBR approved for §§ 3280.604(c), 3280.611(d).

(q) Composite Panel Association (formerly the American Hardboard Association), 19465 Deerfield Ave, Suite 306, Leesburg, VA 20176; telephone: [phone]; website: compositepanel.org.

(1) ANSI A135.4-2012, Basic Hardboard, approved June 8, 2012; IBR approved for § 3280.304(b).

(2) ANSI A135.5-2012, Prefinished Hardboard Paneling, approved March 29, 2012; IBR approved for § 3280.304(b).

(3) ANSI A135.6-2012 (R2020), Engineered Wood Siding, Reaffirmation approved March 13, 2020; IBR approved for § 3280.304(b).

(4) ANSI A208.1-2009, Particleboard, approved February 2, 2009; IBR approved for § 3280.304(b).

(r) CSA Group, formerly known as the Canadian Standards Association (CSA), 178 Rexdale Boulevard, Toronto, ON, M9W 1R3, Canada; telephone: [phone]; website: www.csagroup.org.

(1) AAMA/WDMA/CSA 101/I.S.2/A440-17, North American Fenestration Standard/Specification for Windows, Doors, and Skylights, revised September 2018; IBR approved for §§ 3280.304(b); 3280.403(b) and (e); 3280.404(b) and (e); 3280.405(b) and (e).

(2) ANSI LC 1-2014/CSA 6.26-2014, Fuel gas piping systems using corrugated stainless steel tubing, Published March 2014 (ANSI LC 1); IBR approved for § 3280.705(b).

(3) ANSI Z21.1-2016/CSA 1.1-2016, household cooking gas appliances, Published February 2016 (ANSI Z21.1); IBR approved for § 3280.703(a).

(4) ANSI Z21.5.1-2015/CSA 7.1-2015, gas clothes dryers, volume I, type 1 clothes dryers, Published January 2015 (ANSI Z21.5.1); IBR approved for § 3280.703(a).

(5) ANSI Z21.10.1-2014/CSA 4.1-2014, Gas water heaters, volume I, storage water heaters with input ratings of 75,000 BTU per hour or less, Published November 2014 (ANSI Z21.10.1); IBR approved for §§ 3280.703(a); 3280.707(d).

(6) ANSI Z21.10.3-2014/CSA 4.3-2014, Gas-fired water heaters, volume III, storage water heaters with input ratings above 75,000 BTU per hour, circulating and instantaneous, Published August 2014 (ANSI Z21.10.3); IBR approved for § 3280.703(a).

(7) ANSI Z21.15-2009 (reaffirmed 2019)/CSA 9.1-2009 (reaffirmed 2019), American National Standard/CSA Standard for Manually Operated Gas Valves for Appliances, Appliance Connector Valves and Hose End Valves, Second Edition—2009, Published July 2009 (ANSI Z21.15); IBR approved for §§ 3280.703(c); 3280.705(c) and (l).

(8) ANSI Z21.19-2014/CSA1.4-2014, Refrigerators using gas fuel, Published May 2014 (ANSI Z21.19); IBR approved for § 3280.703(a).

(9) ANSI Z21.20-2014 (reaffirmed 2019)/CAN/CSA C22.2 No.60730-2-5-14 (reaffirmed 2019), Automatic electrical controls for household and similar use—Part 2-5: Particular requirements for automatic electrical burner control systems, Reprinted September 30, 2019 (ANSI Z21.20); IBR approved for § 3280.703(d).

(10) ANSI Z21.21-2012/CSA 6.5-2012, Automatic valves for gas appliances, Fourth Edition—2012, Published November 2012 (ANSI Z21.21); IBR approved for § 3280.703(d).

(11) ANSI Z21.23, Gas Appliance Thermostats and addenda; IBR approved for § 3280.703(d):

(i) ANSI Z21.23-2000, Tenth Edition—2000, ANSI-approved September 27, 2000;

(ii) ANSI Z21.23a-2003, Addenda to the Tenth Edition of Gas Appliance Thermostats, ANSI-approved September 17, 2003; and

(iii) ANSI Z21.23b-2005, Addenda to the Tenth Edition of ANSI Z21.23-2000 and Addenda Z21.23a-2003: Gas Appliance Thermostats, ANSI-approved March 9, 2005.

(12) ANSI Z21.24-2006/CSA 6.10-2006 (reaffirmed 2011), Connectors for Gas Appliances, Third Edition—2006, Published February 2007 (ANSI Z21.24); IBR approved for § 3280.703(c).

(13) ANSI Z21.40.1-1996/CGA 2.91-M96, Gas-Fired, Heat Activated Air Conditioning and Heat Pump Appliances); IBR approved for §§ 3280.703(a); 3280.714(a).

(14) ANSI Z21.47-2012/CSA 2.3-2012, Gas-fired central furnaces, Sixth Edition—2012, ANSI-approved March 27, 2012 (ANSI Z21.47); IBR approved for § 3280.703(a).

(15) ANSI Z21.75-2007/CSA 6.27-2007 (reaffirmed 2012), Connectors for Outdoor Gas Appliances And Manufactured Homes, Second Edition, Published 2007 (ANSI Z21.75); IBR approved for § 3280.703(a).

(s) Decorative Hardwoods Association (formerly HPVA), 42777 Trade West Drive, Sterling, VA 20166; telephone: [phone]; fax: [phone]; website: www.decorativehardwoods.org.

(1) ANSI/HPVA HP-1-2009, American National Standard for Hardwood and Decorative Plywood, approved January 26, 2010; IBR approved for § 3280.304(b).

(2) HP-SG-96, Structural Design Guide for Hardwood Plywood Wall Panels, revised 1996; IBR approved for § 3280.304(b).

(t) FS—Federal Specifications, General Services Administration, Specifications Branch, Room 6039, GSA Building, 7th and D Streets SW, Washington, DC 20407.

(1) FS WW-P-541E/GEN-1980, Plumbing Fixtures (General Specifications); IBR approved for § 3280.604(c).

(2) FS ZZ-R-765B-1970, Silicone Rubber, (with 1971 Amendment); IBR approved for § 3280.611(d).

(3) TT-P-1536A, Plumbing Fixture Setting Compound, July 8, 1975; IBR approved for § 3280.604(b).

(u) Fenestration and Glazing Industry Alliance (FGIA) (formerly known as American Architectural Manufacturers Association (AAMA)), 1900 E Golf Road, Schaumburg, Illinois 60173; website: www.fgiaonline.org.

(1) AAMA 1503.1-88, Voluntary Test Method for Thermal Transmittance and Condensation Resistance of Windows, Doors, and Glazed Wall Sections; IBR approved for § 3280.508(e).

(2) AAMA 1600/I.S.7-00, Voluntary Specification for Skylights, 2003; IBR approved for § 3280.305(c).

(3) AAMA 1701.2-12, Voluntary Standard for Utilization in Manufactured Housing for Primary Windows and Sliding Glass Doors, published November 2012; IBR approved for §§ 3280.403(b) and (e); 3280.404(b) and (e).

(4) AAMA 1702.2-12, Voluntary Standard for Utilization in Manufactured Housing for Swinging Exterior Passage Doors, published November 2012, including errata dated February 16, 2015 and March 29, 2017; IBR approved for §§ 3280.403(e); 3280.405(b) and (e).

(5) AAMA 1704-12, Voluntary Standard Egress Window Systems for Utilization in Manufactured Housing, ( print page 75742) published November 2012; IBR approved for § 3280.404(b) and (e).

(v) HUD User, 11491 Sunset Hills Road, Reston, VA 20190-5254; telephone: [phone]; website: www.huduser.gov.

(1) HUD User No. 0005945, Overall U-values and Heating/Cooling Loads—Manufactured Homes, February 1992; IBR approved for § 3280.508(b).

(2) [Reserved]

(w) IIT Research Institute (IITRI), 10 West 35th Street, Chicago, IL 60616; telephone: [phone]; website: www.iitri.org/​.

(1) IITRI Fire and Safety Research Project J-6461 “Development of Mobile Home Fire Test Methods to Judge the Fire-Safe Performance of Foam Plastic Sheathing and Cavity Insulation”, 1979; IBR approved for § 3280.207(a).

(2) [Reserved]

(x) International Association of Plumbing and Mechanical Officials (IAPMO), 4755 East Philadelphia Street, Ontario, CA 91716; telephone: [phone]; fax: [phone]; website: www.iapmo.org.

(1) IAPMO PS 2-89, Material and Property Standard for Cast Brass and Tubing P-Traps. 1989; IBR approved for § 3280.604(c).

(2) IAPMO PS 4-90, Material and Property Standard for Drains for Prefabricated and Precast Showers, 1990; IBR approved for § 3280.604(c).

(3) IAPMO PS 5-84, Material and Property Standard for Special Cast Iron Fittings, 1984; IBR approved for § 3280.604(c).

(4) IAPMO PS 9-84, Material and Property Standard for Diversion Tees and Twin Waste Elbow, 1984; IBR approved for § 3280.604(c).

(5) IAPMO PS 14-89, Material and Property Standard for Flexible Metallic Water Connectors, 1989; IBR approved for § 3280.604(c).

(6) IAPMO PS 23-89, Material and Property Standard for Dishwasher Drain Airgaps, 1989; IBR approved for § 3280.604(c).

(7) IAPMO PS 31-91, Material and Property Standards for Backflow Prevention Assemblies, 1989; IBR approved for § 3280.604(c).

(8) IAPMO TS 9-2003, Standard for Gas Supply Connectors for Manufactured Homes, revised 2003; IBR approved for § 3280.703(c).

(9) IAPMO TSC 22-85, Standard for Porcelain Enameled Formed Steel Plumbing Fixtures; IBR approved for § 3280.604(c).

(y) International Code Council Evaluation Service (ICC-ES), 3060 Saturn Street, Suite 100, Brea, CA 92821; telephone: [phone]; fax: [phone]; website: www.icc-es.org.

(1) ESR 1539, ICC-ES Evaluation Report; Power Driven Staples and Nails, reissued June 2014; IBR approved for § 3280.304(b).

(2) [Reserved]

(z) International Organization for Standardization, Chemin de Blandonnet 8, CP 401—1214 Vernier, Geneva, Switzerland; telephone: [phone]; website: www.iso.org.

(1) ISO/IEC 17065:2012(E) Conformity assessment—requirements for bodies certifying products, processes and services, approved September 15, 2012; IBR approved for §§ 3280.403(e); 3280.404(e); 3280.405(e).

(2) [Reserved]

(aa) Military Specifications and Standards, Naval Publications and Forms Center (MIL), 5801 Tabor Avenue, Philadelphia, PA 19120; website: www.dsp.dla.mil/​.

(1) MIL-L-10547E-1975, Liners, Case, and Sheet, Overwrap; Water-Vapor Proof or Waterproof, Flexible, 1975; IBR approved for § 3280.611(d).

(2) [Reserved]

(bb) National Electrical Manufacturers Association (NEMA), 1300 North 17th Street, Suite 1752, Arlington, VA 22209; telephone: [phone]; fax: [phone]; website: www.nema.org/​Pages/​default.aspx.

(1) ANSI/NEMA WD-6-1997 Wiring Devices-Dimensional Specifications, 1997; IBR approved for § 3280.803(f).

(2) [Reserved]

(cc) National Fenestration Rating Council (NFRC), 6305 Ivy Lane, Suite 140, Greenbelt, MD 20770; telephone: [phone]; fax: [phone]; website: www.nfrc.org.

(1) NFRC 100, Procedure for Determining Fenestration Product U-factors, 1997 Edition, 1997; IBR approved for § 3280.508(e).

(2) [Reserved]

(dd) National Fire Protection Association (NFPA), 1 Batterymarch Park, Quincy, MA 02269; telephone: [phone]; fax: [phone]; website: www.nfpa.org.

(1) NFPA 13D, Standard for the Installation of Sprinkler Systems in One- and Two- Family Dwellings and Manufactured Homes, 2010 Edition, approved August 26, 2009; IBR approved for § 3280.214(b), (e) and (o).

(2) NFPA 31, Standard for the Installation of Oil-Burning Equipment, 2011 Edition, approved January 3, 2011; IBR approved for §§ 3280.703(d); 3280.707(f).

(3) NFPA 54/ANSI Z223.1, National Fuel Gas Code, 2015 Edition, approved September 3, 2014; IBR approved for § 3280.703(d).

(4) NFPA 58, Liquefied Petroleum Gas Code, 2014 Edition, approved August 1, 2013; IBR approved for § 3280.703(d).

(5) NFPA 70, National Electrical Code, 2014 Edition, approved August 21, 2013; IBR approved for §§ 3280.607(c); 3280.801(b); 3280.803(k); 3280.804(a) and (k); 3280.805(a); 3280.806(a) and (d); 3280.807(c); 3280.808(a), (l), and (p); 3280.810(b); 3280.811(b).

(6) NFPA 90B, Standard for the Installation of Warm Air Heating and Air-Conditioning Systems, 2015 Edition, approved May 19, 2015; IBR approved for § 3280.703(d).

(7) NFPA 220, Standard on Types of Building Construction, Chapter 2: definitions of “limited combustible” and “noncombustible material”, 1995 Edition; IBR approved for § 3280.202.

(8) NFPA 253, Standard Method of Test for Critical Radiant Flux of Floor Covering Systems Using a Radiant Heat Energy Source, 2000; IBR approved for § 3280.207(c).

(9) NFPA 255, Standard Method of Test of Surface Burning Characteristics of Building Materials, 1996; IBR approved for §§ 3280.203(a); 3280.207(a).

(10) NFPA 720, Standard for Installation of Carbon Monoxide Detection (CO) Detection and Warning Equipment, 2015 Edition, Copyright 2014; IBR approved for § 3280.211(b).

(ee) U.S. Department of Commerce, National Institute of Standards and Technology (NIST), Office of Engineering Standards, Room A-166, Technical Building, Washington, DC 20234 and Voluntary Product Division, 100 Bureau Drive, Stop 2100, Gaithersburg, MD 20899-2100; telephone: [phone]; fax: [phone]; website: www.nist.gov.

(1) Voluntary Product Standard PS 1-09, Structural Plywood (With Typical APA Trademarks), effective May 1, 2009 (NIST PS 1); IBR approved for § 3280.304(b).

(2) Voluntary Product Standard PS 2-04, Performance Standard for Wood-Based Structural-Use Panels, December 2004 (NIST PS 2); IBR approval for § 3280.304(b).

(ff) National Sanitation Foundation (NSF), 789 North Dixboro Road, Ann Arbor, MI 48105; telephone: [phone] fax: [phone]; website: www.nsf.org.

(1) ANSI/NSF 14-1990, Plastic Piping Components and Related Materials; IBR approved for § 3280.604(c).

(2) ANSI/NSF 24-1988, Plumbing System Components for Manufactured Homes and Recreational Vehicles; IBR approved for § 3280.604(c).

(3) ANSI/NSF 61-2001, Drinking Water System Components-Health Effects; IBR approved for § 3280.604(b).

(gg) Resources, Applications, Designs, & Controls (RADCO), 3220 East 59th ( print page 75743) Street, Long Beach, CA 90805; telephone: [phone]; fax: [phone]; website: www.radcoinc.com.

(1) RADCO DS-010-91, Decorative Gas Appliances for Installation in Solid Fuel Burning Fireplaces, May 1991; IBR approved for § 3280.703(a).

(2) [Reserved]

(hh) Society of Automotive Engineers (SAE), 400 Commonwealth Drive, Warrendale, PA 15096; telephone: [phone]; website: www.sae.org/​.

(1) SAE J533 (REV SEP 2007), (R) Flares for Tubing, revised September 2007; IBR approved for §§ 3280.703(d); 3280.705(f).

(2) [Reserved]

(ii) Steel Joist Institute (SJI), 234 West Cheves Street, Florence, SC 29501; telephone: [phone]; website: www.steeljoist.org.

(1) SJI 1994, Standard Specifications Load Tables and Weight Tables for Steel Joists and Girders, Fortieth Edition, 1994; IBR approved for § 3280.304(b).

(2) [Reserved]

(jj) Truss Plate Institute (TPI), 2670 Crain Highway, Suite 203, Waldorf, MD 20601; telephone: [phone]; fax: [phone]; website: www.tpinst.org.

(1) TPI 1, National Design Standard for Metal Plate Connected Wood Truss Construction, Commentary, and Appendices, copyright 2008; IBR approved for § 3280.304(b):

(i) ANSI/TPI 1-2007;

(ii) TPI 1-2007 Commentary and Appendices.

(2) [Reserved]

(kk) Underwriters' Laboratories, Inc. (UL), 333 Pfingsten Road, Northbrook, IL 60062; telephone: [phone]; fax: [phone]; website: www.ul.com.

(1) UL 94-1996, with 2001 revisions, Test for Flammability of Plastic Materials for Parts in Devices and Appliances, Fifth Edition; IBR approved for § 3280.715(e).

(2) UL 103, Standard for Safety, Factory-Built Chimneys for Residential Type and Building Heating Appliances, Eleventh Edition, dated October 15, 2010; IBR approved for § 3280.703(d).

(3) UL 109, Tube Fittings for Flammable and Combustible Fluids, Refrigeration Service, and Marine Use, Sixth Edition, dated June 19, 1997, including revisions through January 11, 2005; IBR approved for § 3280.703(d).

(4) UL 127-1996, with 1999 revisions, Factory-Built Fireplaces, Seventh Edition; IBR approved for § 3280.703(d).

(5) UL 174, Standard for Safety Household Electric Storage Tank Water Heaters, Eleventh Edition, dated April 29, 2004, including revisions through December 15, 2016; IBR approved for § 3280.703(a).

(6) UL 181, Standard for Safety Factory-Made Air Ducts and Air Connectors, Eleventh Edition, dated July 25, 2013, including revisions through April 18, 2017; IBR approved for §§ 3280.702, 3280.703(d); 3280.715(a) and (e).

(7) UL 181A, Standard for Safety Closure Systems for Use with Rigid Air Ducts, Fourth Edition, dated January 8, 2013, including revisions through March 22, 2017; IBR approved for §§ 3280.703(d); 3280.715(c).

(8) UL 181B, Standard for Safety Closure Systems for use with Flexible Air Ducts and Air Connectors, First Edition, 1995, with 1998 revisions; IBR approved for §§ 3280.703(d); 3280.715(c).

(9) UL 217, Single and Multiple Station Smoke Alarms, Fifth Edition, dated January 4, 1999; IBR approved for §§ 3280.209(a); 3280.211(a).

(10) UL 263, Standard for Safety Fire Tests of Building Construction and Materials, Fourteenth Edition, dated June 21, 2011, including revisions through January 31, 2019; IBR approved for § 3280.215(a) and (d).

(11) UL 268, Smoke Detectors for Fire Protective Signaling Systems, Fourth Edition, dated December 30, 1996, including revisions through January 4, 1999; IBR approved for §§ 3280.209(a); 3280.703(a).

(12) UL 307A, Liquid Fuel Burning Heating Appliances for Manufactured Homes and Recreational Vehicles, Eighth Edition, dated February 25, 2009; IBR approved for §§ 3280.703(a); 3280.707(f).

(13) UL 307B, Gas Burning Heating Appliances for Manufactured Homes and Recreational Vehicles, Fifth Edition, dated October 31, 2006, including revisions through September 17, 2013; IBR approved for § 3280.703(a).

(14) UL 311, Roof Jacks for Manufactured Homes and Recreational Vehicles, Eighth Edition, 1994, with 1998 revisions; IBR approved for § 3280.703(d).

(15) UL 441, Gas Vents, Tenth Edition, dated March 5, 2010, including revisions through June 12, 2014; IBR approved for § 3280.703(d).

(16) UL 499, Standard for Safety Electric Heating Appliances, Fourteenth Edition, dated November 7, 2014, including revisions through February 23, 2017; IBR approved for § 3280.703(a).

(17) UL 569, Standard for Safety Pigtails and Flexible Hose Connectors for LP-Gas, 2013; IBR approved for §§ 3280.703(d); 3280.705(l).

(18) UL 737, Fireplace Stoves, Eighth Edition, 1996, with 2000 revisions; IBR approved for § 3280.703(d).

(19) UL 923 Microwave Cooking Appliances, Fifth Edition, May 23, 2002; IBR approved for § 3280.204(c).

(20) UL 1042, Standards for Safety Electric Baseboard Heating Equipment, Fifth Edition, dated August 31, 2009, including revisions through December 14, 2016; IBR approved for § 3280.703(a).

(21) UL 1096, Electric Central Air Heating Equipment, Fourth Edition, 1986, with revisions July 16, 1986, and January 30, 1988; IBR approved for § 3280.703(a).

(22) UL 1479, Fire Tests of Penetration Firestops, Fourth Edition, dated June 10, 2015; IBR approved for § 3280.215(d).

(23) UL 1482, Solid-Fuel Type Room Heaters, Fifth Edition, 1996, with 2000 revisions; IBR approved for § 3280.703(d).

(24) UL 2021-1997. Fixed and Location-Dedicated Electric Room Heaters, Second Edition, with 1998 revisions; IBR approved for § 3280.703(a).

(25) UL 2034, Standard for Safety Single and Multiple Station Carbon Monoxide Alarms, Fourth Edition, dated March 31, 2017; IBR approved for §§ 3280.209(a); 3280.211(a); 3280.703(a).

(26) UL 60335-2-40-2012, Standard for Safety: Household and Similar Electrical Appliances—Part 2-40: Particular Requirements for Electrical Heat Pumps, Air-Conditioners and Dehumidifiers, First Edition, dated November 30, 2012; IBR approved for § 3280.703(a).

(ll) Underwriters' Laboratories of Canada (ULC), 7 Underwriters Road, Toronto, Ontario, Canada M1 R 3A9; telephone: [phone]; fax: [phone]; website: www.ul.com/​canada/​eng/​pages/​.

(1) CAN/ULC S102.2-M88, Standard Method of Test for Surface Burning Characteristics of Floor Coverings and Miscellaneous Materials and Assemblies, Fourth Edition, April 1988; IBR approved for § 3280.207(b).

(2) [Reserved]

(mm) Window and Door Manufacturers Association (WDMA), 2001 K Street NW, 3rd Floor North, Washington, DC 20006; telephone: [phone]; website: www.wdma.com.

(1) WDMA I.S.4-09, Industry Specification for Preservative Treatment for Millwork, copyright 2009; IBR approved for § 3280.405(c).

(2) [Reserved]

4. Amend § 3280.5 by revising the first sentence of the introductory text to read as follows:

( print page 75744)

§ 3280.5

Data plate.

Each dwelling unit of a manufactured home must bear a data plate affixed in a permanent manner near the main electrical panel or other readily accessible and visible location. * * *

* * * * *

5. Revise § 3280.102 to read as follows:

§ 3280.102

Definitions.

Air, exhaust means air discharged from any space to the outside by an exhaust system.

Air, outdoor means air from outside the building taken into a ventilation system or air from outside the building that enters a space through infiltration or natural ventilation openings.

Exhaust system means one or more exhaust fans that remove air from the building, causing outdoor air to enter by ventilation inlets or normal leakage paths through the building envelope.

Gross floor area means all space, wall to wall, including recessed entries not to exceed five (5) square feet and areas under built-in vanities and similar furniture. When the ceiling height is less than that specified in § 3280.104, the floor area under such ceilings must not be included in the gross floor area. Floor area of closets must also not be included in the gross floor area.

Habitable room means a room or enclosed floor space arranged for living, eating, food preparation, or sleeping purposes not including bathrooms, foyers, hallways, and other accessory floor space.

Laundry area means an area containing or designed to contain a laundry tray, clothes washer and/or clothes dryer.

Mechanical ventilation means the active process of supplying air to or removing air from an indoor space by powered equipment such as motor-driven fans and blowers but not by devices such as wind-turbine ventilators and mechanically operated windows.

Natural ventilation means ventilation occurring as a result of natural forces, such as wind pressure or differences in air density, through intentional openings such as open windows or doors.

Supply system means one or more fans that supply outdoor air to the building, causing indoor air to leave by normal air leakage through the building envelope.

Ventilation means the process of supplying outdoor air to or removing indoor air from the manufactured home by natural or mechanical means. Such air may or may not have been conditioned.

6. Amend § 3280.103 by:

a. Revising paragraphs (b) introductory text, (b)(1) and (3), (c)(2) and (3), and (d); and

b. Adding paragraph (e).

The revisions and addition read as follows:

§ 3280.103

Light and ventilation.

* * * * *

(b) Whole-house ventilation. Each dwelling unit of a manufactured home must be provided with a whole-house mechanical ventilation having the capability to provide a minimum capacity of 0.035 ft³ /min/ft² of interior floor space or its hourly average equivalent. This ventilation capacity must be in addition to any openable window area. In no case shall the installed ventilation capacity of the system be less than 50 cfm. The following criteria must be adhered to:

(1) The ventilation capacity must be provided by a mechanical ventilation system or a combination natural and mechanical ventilation system.

* * * * *

(3) The ventilation supply system or a portion of the ventilation supply system is permitted to be integral with the home's heating or cooling system. The supply system must be capable of operating independently of the heating and cooling modes. A mechanical ventilation supply system that is integral with the heating and cooling system is to be listed as part of the heating and cooling system or listed as suitable for use with that system.

* * * * *

(c) * * *

(2) Kitchens must be provided with a local exhaust system that is capable of exhausting 100 cfm to the outside of the home. The local exhaust system must be located as close as possible to the range or cook top, but in no case farther than 3 feet horizontally from the range or cooktop.

(3) Each bathroom and separate toilet compartment must be provided with a local exhaust system capable of exhausting 50 cfm to the outside of the home. A separate toilet compartment may be provided with 1.5 square feet of openable glazed area in place of a local exhaust system, except in Uo value Zone 3.

(d) Optional ventilation provisions. As an option to complying with the provisions of paragraphs (b) and (c) of this section, ventilation systems complying with ANSI/ASHRAE 62.2 (incorporated by reference, see § 3280.4) may be used.

(e) Airflow rating. During the design stage, the airflow rating at a pressure of 0.25 inch water column may be used, provided the duct sizing meets the prescriptive requirements of table 5.3 in ANSI/ASHRAE 62.2 (incorporated by reference, see § 3280.4) or ventilation system manufacturer's design criteria.

7. Amend § 3280.105 by revising paragraphs (a) introductory text, (a)(2)(i), and (b)(2) to read as follows:

§ 3280.105

Exit facilities; exterior doors.

(a) Number and location of exterior doors. Each dwelling unit of a manufactured home must have a minimum of two exterior doors located remotely from each other.

* * * * *

(2) * * *

(i) Both of the required doors must not be in the same room. Rooms are defined by their use or purpose.

* * * * *

(b) * * *

(2) All exterior swinging doors must provide a minimum 28 inch wide by 74 inch high clear opening. Door seals and/or door stops are permitted to reduce the opening, either vertically or horizontally, by a maximum of one inch, except for the one egress door where door seals and/or door stops are not permitted to reduce the opening. All exterior sliding glass doors must provide a minimum 28 inch wide by 72 inch high clear opening. At least one exterior egress door must provide a minimum of 32 inch wide by 74 inch high clear opening and door seals and/or door stops are not permitted to reduce the opening.

* * * * *

8. Amend § 3280.109 by revising paragraph (a) to read as follows:

§ 3280.109

Room requirements.

(a) Each dwelling unit of a manufactured home must have at least one living area with a minimum of 150 square feet of gross floor area.

* * * * *

9. Revise § 3280.112 to read as follows:

§ 3280.112

Hallways.

Hallways must have a minimum horizontal dimension of 28 inches measured from the interior finished surface to the interior finished surface of the opposite wall. For manufactured homes with 14 feet of inside width or more, hallways must have a minimum horizontal dimension of 30 inches measured from the interior finished surface to the interior finished surface of the opposite wall. When appliances are installed in a laundry area, the measurement must be from the front of the appliance to the opposite finished ( print page 75745) interior surface. When appliances are not installed and a laundry area is provided, the area must have a minimum clear depth of 27 inches in addition to the 28 inches, or 30 inches for manufactured homes with 14 feet of inside width or greater, required for passage. In addition, a notice of the available clearance for washer/dryer units must be posted in the laundry area. Minor protrusions into the minimum hallway width by doorknobs, trim, smoke alarms or light fixtures are permitted.

10. Amend § 3280.113 by revising paragraph (d) to read as follows:

§ 3280.113

Glass and glazed openings.

* * * * *

(d) Safety glazing is any glazing material capable of meeting the requirements of Consumer Product Safety Commission 16 CFR part 1201, or ANSI Z97.1 (incorporated by reference, see § 3280.4).

* * * * *

11. Add § 3280.115 to subpart B to read as follows:

§ 3280.115

Sound transmission between multi-dwelling unit manufactured homes.

(a) Scope. This section applies to common interior walls, partitions, and floor/ceiling assemblies between adjacent dwelling units.

(b) Air-borne sound. Walls, partitions, and floor/ceiling assemblies between stories separating dwelling units from each other must have a sound transmission class (STC) of not less than 34 for air-borne noise when tested in accordance with ASTM E90 (incorporated by reference, see § 3280.4) or calculated. Penetrations or openings in construction assemblies for piping; electrical devices; recessed cabinets; bathtubs; soffits; or heating, ventilating, or exhaust ducts must be sealed, lined, insulated or otherwise treated to maintain the required ratings. This requirement does not apply to dwelling unit entrance doors; however, such doors must be tight fitting to the frame and sill.

(c) Structure-borne sound. Floor/ceiling assemblies between stories separating dwelling units must have an impact insulation class (IIC) rating of not less than 34 when tested in accordance with ASTM E492 (incorporated by reference, see § 3280.4).

12. Amend § 3280.203 by revising paragraph (c)(1)(ii) to read as follows:

§ 3280.203

Flame spread limitations and fire protection requirements.

* * * * *

(c) * * *

(1) * * *

(ii) Exposed bottoms and sides of kitchen cabinets as required by § 3280.204 except that non-horizontal surfaces above the horizontal plane formed by the bottom of the range hood are not considered exposed;

* * * * *

13. Amend § 3280.204 by revising the first sentence of paragraph (a) and adding paragraph (f) to read as follows:

§ 3280.204

Kitchen cabinet protection.

(a) The exposed bottom and sides of combustible kitchen cabinets over cooking ranges to a horizontal distance of 6 inches from the outside edge of the cooking range must be protected with at least 5/16 inch thick gypsum board or equivalent limited combustible material. * * *

* * * * *

(f) Range hood finish materials must be installed with at least 5/16 inch thick gypsum board or equivalent limited combustible material between the metal range hood and finish materials. Except for sealants and other trim materials 2 inches or less in width, finish materials shall have a flame spread rating not exceeding the Flame Spread Index of 200.

14. Amend § 3280.209 by revising paragraph (a) read as follows:

§ 3280.209

Smoke alarm requirements.

(a) Labeling. Each smoke alarm required under paragraph (b) of this section must conform with the requirements of UL 217 (incorporated by reference, see § 3280.4) or UL 268 (incorporated by reference, see § 3280.4), and must bear a label to evidence conformance. Combination smoke and carbon monoxide alarms shall be listed and must bear a label to evidence conformance with UL 217 and UL 2034.

* * * * *

15. Amend § 3280.211 by revising paragraph (a) to read as follows:

§ 3280.211

Carbon monoxide alarm requirements.

(a) Labeling. Carbon monoxide alarms shall be listed and must bear a label to evidence conformance with UL 2034 (incorporated by reference, see § 3280.4). Combination carbon monoxide and smoke alarms shall be listed and must bear a label to evidence conformance with UL 2034 and UL 217 (incorporated by reference, see § 3280.4).

* * * * *

16. Add §§ 3280.214 through 3280.216 to subpart C to read as follows:

§ 3280.214

Fire sprinkler system requirements.

(a) General. (1) Fire sprinkler systems are not required by this subpart; however, when a manufacturer installs a fire sprinkler system as an optional feature selected by the consumer or to meet State or local laws and regulations, this section establishes the requirements for the installation of a fire sprinkler system in a manufactured home.

(2) This section applies to both stand-alone and multipurpose fire sprinkler systems that do not include the use of antifreeze.

(3) A back-flow preventer is not required to separate a stand-alone sprinkler system from the water distribution system.

(b) Design. The design of the fire sprinkler system itself shall be in accordance with NFPA 13D (incorporated by reference, see § 3280.4) or a design which is deemed to be equivalent to the design method used in NFPA 13D.

(c) Sprinkler location. Sprinklers must be installed to protect all areas inside the manufactured home except:

(1) Attics and normally unoccupied concealed spaces;

(2) Closets not exceeding 24 square feet in area, with the smallest dimension not greater than three feet and having at least one base layer of minimum 5/16 inch thick gypsum board on wall and ceiling surfaces;

(3) Bathrooms not more than 55 square feet in area;

(4) Garages, carports, open attached porches and similar structures; and

(5) Closets or alcoves containing heat-producing appliance, regardless of size if the closet or alcove complies with § 3280.203(b)(3).

(d) Sprinklers. Sprinklers shall be new, listed residential sprinklers and shall be installed in accordance with the sprinkler manufacturer's installation instructions.

(e) Temperature rating and separation from heat sources. Sprinklers are to have a temperature rating and be separated from heat sources as follows:

(1) Sprinklers separated from heat sources as required by the sprinkler manufacturer's installation instructions are to a have a temperature rating of no less than 135 °F (57 °C) and not more than 170 °F (77 °C).

( print page 75746)

(2) Sprinklers located within the distance to a heat source as specified in table 7.5.5.3 of NFPA 13D (incorporated by reference, see § 3280.4) are to have an intermediate temperature rating not less than 175 °F (79 °C) and not more than 225 °F (107 °C) when installed in the following locations:

(i) Attics;

(ii) Concealed spaces located directly beneath a roof; and

(iii) Directly under skylights where the sprinkler is exposed to direct sunlight.

(f) Freezing areas. Piping must be protected from freezing as required by § 3280.603(b)(4). Where sprinklers are required in areas subject to freezing, dry-sidewall or dry-pendent sprinklers extending from nonfreezing area into a freezing area, must be installed.

(g) Sprinkler area of coverage. The area of coverage of a single sprinkler shall not exceed 400 square feet and shall be based on the sprinkler listing and the sprinkler manufacturer's installation instructions. Sprinkler discharge shall not be blocked by obstructions unless additional sprinklers are installed to protect the obstructed area. Sprinkler separation from obstructions shall comply with the minimum distances specified in the sprinkler manufacturer's instructions. Pendent sprinklers within 3 feet of the center of a ceiling fan, surface-mounted ceiling light or other similar object shall be considered to be obstructed and additional sprinklers shall be installed, except that in all closets 50 square feet or less in size, one sprinkler shall be sufficient. Sidewall sprinklers within 5 feet of the center of a ceiling fan, surface-mounted ceiling light or other similar object shall be considered to be obstructed and additional sprinklers shall be installed.

(h) Sprinkler installation on systems assembled with solvent cement. The solvent cementing of threaded adapter fittings shall be completed and threaded adapters for sprinklers shall be verified as being clear of excess cement prior to the installation of sprinklers on systems assembled with solvent cement.

(i) Painting, caulking or modifying sprinklers is prohibited. Painted, caulked, modified, or damaged sprinklers shall be replaced.

(j) Sprinkler piping support. Sprinkler piping shall be supported in accordance with § 3280.608. Sprinkler piping must comply with all requirements for cold-water distribution piping. For multipurpose piping systems, the sprinkler piping shall connect to and be part of the cold-water distribution piping system. Nonmetallic pipe and tubing, such as CPVC and PEX, shall be listed for use in residential fire sprinkler systems. Nonmetallic pipe and tubing systems shall be protected from exposure to the living space by a layer of not less than 5/16 inch thick gypsum wallboard, 1/2 inch thick plywood, or other material having a 15 minute fire rating. Pipe protection shall not be required where exposed piping is permitted by the pipe listing and in areas that do not require protection with sprinklers as specified in paragraph (c) of this section.

(k) Shutoff valves. Shutoff valves shall not be installed in any location where the valve would isolate piping serving one or more sprinklers, except for shutoff valves installed for the entire water distribution system.

(l) Means of drainage. A means to drain the sprinkler system shall be provided on the system side of the water supply inlet.

(m) Minimum flow rate. The sprinkler system must provide at least the flow rate required to produce a minimum discharge density of 0.05 gpm/ft² from each sprinkler and be determined by using the sprinkler manufacturer's published data for the specific sprinkler model based on the area of coverage, ceiling configuration, temperature rating and any other conditions specified by the sprinkler manufacturer.

(n) Design flow rate. The design flow rate for the sprinkler system shall be based on the following:

(1) The design flow rate for a room having only one sprinkler shall be the flow rate required for that sprinkler, as determined by paragraph (m) of this section.

(2) The design flow rate for a room having two or more sprinklers shall be determined by identifying the sprinkler in that room with the highest required flow rate, based on paragraph (m) of this section, and multiplying that flow rate by two.

(3) Where the sprinkler manufacturer's instructions specify different criteria for ceiling configurations that are not smooth, flat and horizontal, the required design flow rate for the room shall comply with the sprinkler manufacturer's instructions.

(4) The design flow rate for the sprinkler system shall be the flow required by the room with the largest flow rate, based on paragraph (n)(1), (2), or (3) of this section.

(5) For the purposes of this section, it shall be permissible to reduce the design flow rate for a room by subdividing the space into two or more rooms, where each room is evaluated separately with respect to the required design flow rate. Walls and a ceiling shall bound each room. Openings in walls shall have a lintel (header) not less than 8 inches in depth and each lintel shall form a solid barrier between the ceiling and the top of the opening.

(o) Pipe sizing and minimum required supply pressure. (1) The piping to sprinklers shall be sized for the flow required by paragraph (n) of this section. The flow rate required to supply the plumbing fixtures shall not be required to be added to the sprinkler design flow rate. The minimum pipe size from the water supply inlet to any sprinkler shall be 3/4 inch diameter. Threaded adapter fittings at the point where sprinklers are attached to the piping shall be a minimum of 1/2 inch diameter.

(2) Piping shall be sized by determining the Available Pressure to offset friction loss in piping and identifying a piping material, diameter and length in accordance with the following:

(i) Minimum supply pressure required. The following equation shall be used to determine the required supply pressure at the fire sprinkler system supply inlet.

Equation 1 to Paragraph (o)(2)(i):

PSUP = PT+PLE+PSP

Where:

PSUP = Pressure required at the fire sprinkler system supply inlet. ( Note: This is the pressure which is entered on the Fire Sprinkler System Certificate under “Minimum Water Supply Required.”)

PT = Pressure loss in the fire sprinkler system piping.

PLE = Pressure loss from elevation change. ( Note: Normally 4.4 psi for single story houses and 8.7 psi for two story houses).

PSP = Maximum pressure required by a sprinkler.

(ii) [Reserved]

(3) Determination of PSUP shall be in accordance with the following procedure:

(i) Step 1. Determine PT. For the specific design in question determine the distance (developed length) from the fire sprinkler system supply inlet to the most remote sprinkler. Refer to tables 8.4.10.2(d) through (i) of NFPA 13D (incorporated by reference, see § 3280.4) and select the correct table for the fire sprinkler system pipe material and pipe size used. Using the system design flow rate from paragraph (n) of this section find the “Allowable length of pipe” column, which is closest to, but not less than, the developed length for the design in question. The “Available Pressure” in the column heading is PT. ( Note: Interpolation between “Allowable length of pipe” (developed length) and “Available Pressure” (PT) is permitted. Example: Using table ( print page 75747) 8.4.10.2(d) of NFPA 13D, Sprinkler Flow Rate = 16 gpm, developed length = 70 feet, Available Pressure (PT) = 17.5 psi.)

(ii) Step 2. Determine PLE. Refer to table 8.4.10.2.(c) of NFPA 13D. The elevation used in applying the table shall be the difference between the highest sprinkler and the fire sprinkler system supply inlet. Interpolation is permitted. ( Note: If the highest sprinkler is lower than the fire sprinkler system supply inlet then subtract this value in equation 1 to paragraph (o)(2)(i), instead of adding it.)

(iii) Step 3. Determine PSP. Determine the maximum pressure required by any individual sprinkler based on the flow rate for each sprinkler as set forth in paragraph (n) of this section. The required pressure is provided in the data provided by the sprinkler manufacturer for the specific model based on the selected flow rate.

(p) Testing. The fire sprinkler system piping shall be subject to the same test as the water distribution system in § 3280.612(a). For multipurpose fire sprinkler systems, it shall be permitted to test the fire sprinkler system piping simultaneously with the domestic water distribution system.

(q) Fire Sprinkler System Certificate. The manufacturer must permanently affix a Fire Sprinkler System Certificate adjacent to the data plate. The manufacturer must specify on the Fire Sprinkler System Certificate the minimum required pressure in pounds per square inch (psi) and flow rate in gallons per minute (gpm) for the water supply system. The Fire Sprinkler System Certificate is to include all the statements and required information arranged in substantially the same layout as shown in the following example.

Example 1 to Paragraph (q)—Example Certificate

Fire Sprinkler System Certificate

Note:

This label contains important information about the fire sprinkler system installed in this home. Please do not remove, alter, or cover this label.

General Information

Name of Manufacturer:

Manufactured Home Serial Number:

The residential fire sprinkler system installed in this dwelling unit is in compliance with 24 CFR part 3280.214 Fire Sprinkler System Requirements. The manufactured home installer must ensure that water supply testing is completed by a fire protection technician, as required below at the home site.

Warning: When necessary, replace components only with identical components or those determined to have equivalent performance characteristics with respect to flows and pressures.

Minimum Water Supply Required

Warning: For this system to operate properly, the following minimum supply of water must be available at the point of connection to the residential fire sprinkler system (to be completed by the home manufacturer):

gpm (gallons per minute) at not less than___

psi (pounds per square inch)

The water supply shall have the capacity to provide the above required design flow rate for the sprinklers for a period of time as follows:

1. Seven minutes for manufactured homes one story in height and less than 2,000 square feet in area.

2. Ten minutes for manufactured homes two or more stories in height or equal to or greater than 2,000 square feet in area.

Where a water supply tank, a well system or a combination thereof is used, any combination of tank storage or well system shall be permitted to meet the capacity requirement.

An installer shall ensure that a fire protection technician completes and signs this Fire Sprinkler System Certificate and shall maintain a copy of the test report from the onsite testing in accordance with the home manufacturer's instructions and that the above listed required minimum water supply is available.

Company and/or Individual Name of Fire Protection Technician:

License/Certification Number of Technician:

Address of Technician:

Date Water Supply Tested:

Warning: This structure contains a residential fire sprinkler system. Do not alter or make additions to the water supply without first contacting the home manufacturer or a fire protection technician. Any control valve(s) on the water supply to the residential fire sprinkler system must be in the full, open position for the system to operate properly. If the valves must be closed temporarily to service the sprinkler, verify that they are left fully open and secured when service is complete.

(r) Sign or valve tag. A sign or valve tag shall be installed at the fire sprinkler system supply inlet stating the following:

Warning, the water supply system supplies fire sprinklers that require specific flows and pressures to fight a fire. Devices that restrict the flow or decrease the pressure or automatically shut off the water to the fire sprinkler system, such as water filtration systems, water softeners and automatic shutoff valves, shall not be added to this system during installation without HUD approval. Later actions that may impact the water supply system should not be completed without first contacting the home manufacturer or a fire protection technician. Please do not remove this sign.

(s) Component instructions. If the manufacturer of a fire sprinkler system component used in a system provides written instructions and procedures for the operation, maintenance, periodic testing, and/or repair of the component, a copy of the instructions and procedures shall be left in each home for the consumer.

(t) Manufacturer's installation instructions for fire sprinkler systems. Manufacturer's installation instructions must provide the following:

(1) Specific instructions for the inspection and testing of the fire sprinkler system during the installation of the home. Testing requirements are to be consistent with § 3280.612(a).

(2) Required statement. If this manufactured home contains a fire sprinkler system, an installer shall ensure a fire protection technician tests the water supply at the site and completes the Fire Safety System Certificate and that the test reports the minimum conditions described on the Fire Sprinkler System Certificate in the home (located next to the data plate).

§ 3280.215

Multi-dwelling unit manufactured homes.

(a) General. In manufactured homes with more than one dwelling unit, each dwelling unit must be separated from each other by wall and floor assemblies having not less than a 1 hour fire resistance rating when tested in accordance with ASTM E119 or UL 263 (both incorporated by reference, see § 3280.4) or having a fire resistance rating of not less than a 1 hour when calculated in accordance with chapter 16 of the AWC National Design Specification (NDS) for Wood Construction, with Supplement (incorporated by reference, see § 3280.4).

(b) Fire resistance walls. Fire-resistance-rated floor/ceiling and wall assemblies must extend to and be tight against the exterior wall, and wall ( print page 75748) assemblies must extend from the foundation to the underside of the roof sheathing except as follows:

(1) Wall assemblies need not extend through attic spaces where the ceiling is protected by not less than 5/8 inch Type X gypsum board and attic draftstop constructed as specified in § 3280.216 is provided above and along the wall assembly separating the dwelling units; and

(2) The structural framing supporting the ceiling is protected by not less than 1/2 inch gypsum board or equivalent.

(3) A fire resistance rating of 1/2 hour shall be permitted in buildings equipped throughout with an automatic sprinkler system installed in accordance with § 3280.214.

(c) Supporting construction. Where floor assemblies are required to be fire resistant rated by this section, the supporting construction of such assemblies must have an equal or greater fire resistance rating.

(d) Dwelling unit rated penetrations. Penetrations of wall or floor-ceiling assemblies in multi-dwelling unit manufactured homes are required to be fire-resistance rated in accordance with this section.

(1) Through penetrations. (i) Through penetrations must be installed as tested in the approved fire-resistance rated assembly; or

(ii) Through penetrations must be protected by an approved penetration fire stop system installed as tested in accordance with ASTM E814 or UL 1479 (both incorporated by reference, see § 3280.4), with a positive pressure differential of not less than 0.01 inch of water and must have an F rating of not less than the required fire resistance rating of the wall or floor-ceiling assembly penetrated; or

(iii) Where the penetrating items are steel, ferrous or copper pipes, tubes, or conduits, the material used to fill the annular space must prevent the passage of flame and hot gasses sufficient to ignite cotton waste where subjected to ASTM E119 or UL 263 (both incorporated by reference, see § 3280.4) time temperature fire conditions under a positive pressure differential of not less than 0.01 inch of water at the location of the through penetration for the time period equivalent to the fire resistance rating of the construction penetrated.

(2) Membrane penetrations. Membrane penetrations must comply with paragraph (d)(1) of this section. Where walls are required to have a fire resistance rating, recessed fixtures must be installed so that the required fire resistance rating will not be reduced except as follows:

(i) By membrane penetrations of fire-resistant-rated walls, ceiling/floors and partitions by steel electrical boxes provided they do not exceed 16 square inches in area and the aggregate area of the openings through the membrane does not exceed 100 square inches in any 100 square feet of wall area. The annular space between the wall membrane and the box must not exceed 1/8 inch. Such boxes on opposite sides of the wall must be separated by one of the following:

(A) A horizontal distance of not less than 24 inches where the wall or partition is constructed with individual non-communicating stud cavities; or

(B) A horizontal distance of not less than the depth of the wall cavity, where the wall cavity is filled with loose-fill insulation; or

(C) Solid fire blocking in accordance with § 3280.206; or

(D) Protecting both boxes with listed putty pads; or

(E) Other listed materials and methods.

(ii) By membrane penetrations of listed electrical boxes of any materials provided that the boxes have been tested for use in fire resistance rated assemblies and are installed in accordance with the instructions included with the listing. The annular space between the wall membrane and the box must not exceed 1/8 inch unless otherwise noted. Such boxes on opposite sides of the wall must be separated by one of the following:

(A) The horizontal distance specified in the listing of the electrical boxes; or

(B) Sold fire blocking in accordance with § 3280.206; or

(C) Protecting boxes with listed putty pads; or

(D) Other listed materials and methods.

(iii) By the annular space created by the penetration of a fire sprinkler provided that it is covered by a metal escutcheon plate.

§ 3280.216

Draftstopping requirements for multi-dwelling unit manufactured homes.

(a) When there is usable space both above and below the concealed space of a floor/ceiling assembly in multi-dwelling unit manufactured homes, draftstops must be installed so that the area of the concealed space does not exceed 1,000 square feet. Draftstopping must divide the concealed space into approximately equal areas. Where the assembly is enclosed by a floor membrane above and a ceiling membrane below, draftstopping shall be provided in floor-ceiling assemblies under the following circumstances:

(1) Ceiling is suspended under the floor framing; or

(2) Floor framing is constructed of truss type open-web or perforated members.

(b) Draftstopping materials must not be less than 1/2 inch gypsum board, 3/8 inch wood structural panels, or other approved materials adequately supported.

(c) Draftstopping must be installed parallel to the floor framing members.

(d) The integrity of all draftstops must be maintained.

17. Amend § 3280.303 by revising paragraph (b) to read as follows:

§ 3280.303

General requirements.

* * * * *

(b) Construction. All Construction methods must be in conformance with an approved quality assurance manual as provided by §§ 3282.203 and 3282.361(c) and accepted engineering practices to ensure durable, livable, and safe housing.

* * * * *

18. Revise and republish § 3280.304 to read as follows:

§ 3280.304

Materials.

(a) Dimension and board lumber must not exceed 19 percent moisture content at the time of installation, except that treated lumber used for exterior purposes only and does not extend into the main home construction may have a moisture content exceeding 19 percent.

(b) The standards for some of the generally used materials and methods of construction that are listed in this paragraph (b) are incorporated by reference (see § 3280.4).

(1) Aluminum. (i) Aluminum Design Manual, Specifications and Guidelines for Aluminum Structures, Part 1-A (Aluminum Association).

(ii) Aluminum Design Manual, Specifications and Guidelines for Aluminum Structures, Part 1-B (Aluminum Association).

(2) Steel. (i) Specification for Structural Steel Buildings—AISC 360.

(ii) North American Specification for the Design of Cold-Formed Steel Structural Members—AISI S100.

(iii) Specification for the Design of Cold-Formed Stainless Steel Structural Members—SEI/ASCE 8.

(iv) Standard Specifications Load Tables and Weight Tables for Steel Joists and Joist Girders—SJI.

(v) Structural Applications of Steel Cables for Buildings—ASCE 19.

(vi) Standard Specification for Strapping, Flat Steel and Seals—ASTM D3953.

(3) Wood and wood products. (i) Basic Hardboard—ANSI A135.4 (Composite Panel Association). ( print page 75749)

(ii) Prefinished Hardboard Paneling—ANSI A135.5 (Composite Panel Association).

(iii) Engineered Wood Siding—ANSI A135.6 (Composite Panel Association).

(iv) American National Standard for Hardwood and Decorative Plywood—ANSI/HPVA HP-1 (Decorative Hardwoods Association).

(v) Structural Design Guide for Hardwood Plywood Wall Panels—HP-SG (Decorative Hardwoods Association).

(vi) For Wood Products—Structural Glued Laminated Timber—ANSI/AITC A190.1.

(vii) Structural Plywood (With Typical APA Trademarks)—NIST PS 1.

(viii) APA Design/Construction Guide, Residential and Commercial Structures—APA E30-P.

(ix) National Design Standard for Metal Plate Connected Wood Truss Construction, TPI 1.

(x) Design and Fabrication of All-Plywood Beams—H815G.

(xi) Panel Design Specification—APA D510C.

(xii) Design and Fabrication of Glued Plywood-Lumber Beams—APA S812S.

(xiii) Design and Fabrication of Plywood Curved Panels—APA S811P.

(xiv) Design and Fabrication of Plywood Sandwich Panels, APA U814J.

(xv) Performance Standard for Wood-Based Structural Use Panels—NIST PS 2.

(xvi) Design and Fabrication of Plywood Stressed-Skin Panels—APA U813M.

(xvii) National Design Specifications for Wood Construction, with Supplement, Design Values for Wood Construction—AWC NDS.

(xviii) Wood Structural Design Data (AFPA).

(xix) Span Tables for Joists and Rafters: American Softwood Lumber Standard (PS 20-10) Sizes—AWC-2012.

(xx) Design Values for Joists and Rafters, Supplement to Span Tables for Joists and Rafters—AWC-2012.

(xxi) Particleboard—ANSI A208.1 (Composite Panel Association).

(xxii) North American Fenestration Standard/Specification for Windows, Doors and Skylights—AAMA/WDMA/CSA 101/I.S.2/A440 (CSA Group).

(xxiii) Standard Test Methods for Puncture and Stiffness of Paperboard, and Corrugated and Solid Fiberboard—ASTM D781.

(xxiv) Standard Test Methods for Direct Moisture Content Measurement of Wood and Wood-Base Materials—ASTM D4442.

(xxv) Standard Test Method for Laboratory Standardization and Calibration of Hand-Held Moisture Meters—ASTM D4444.

(xxvi) Medium Density Fiberboard (MDF) For Interior Applications—ANSI A208.2.

(xxvii) Standard Test Methods for Fire Tests of Building Construction and Materials—ASTM E119.

(xxviii) Engineered Wood Construction Guide—APA E30V.

(xxix) Plywood Design—APA Y510.

(4) Other. (i) Standard Specification for Gypsum Board—ASTM C1396/C1396M.

(ii) [Reserved].

(5) Fasteners. (i) ICC-ES Evaluation Report: Power Driven Staples and Nails—ESR 1539.

(ii) [Reserved]

(6) Unclassified. (i) Minimum Design Loads for Buildings and Other Structures—ANSI/ASCE.

(ii) Safety Glazing Materials Used in Buildings—Safety Performance Specifications and Methods of Test—ANSI Z97.1.

(iii) Standard Specification for Rigid Poly (Vinyl Chloride) (PVC) Siding—ASTM D3679-09a.

(iv) Standard Practice for Installation of Rigid Poly (Vinyl Chloride) (PVC) Siding and Soffit—ASTM D4756.

(v) Standard Specification for Polypropylene (PP) Siding—ASTM D7254.

(c) Materials and methods of construction utilized in the design and construction of manufactured homes which are covered by the standards listed in this section, or any applicable portion thereof shall comply with these requirements.

(d) Engineering analysis and testing methods contained in these references shall be utilized to judge conformance with accepted engineering practices required in § 3280.303(c).

(e) Materials and methods of installation conforming to these standards shall be considered acceptable when installed in conformance with the requirements of this part.

(f) Materials meeting the standards listed in this section (or the applicable portion thereof) are considered acceptable unless otherwise specified herein or unless substantial doubt exists as to conformance.

(g) Wood products shall be identified as complying with the appropriate standards.

19. Amend § 3280.305 by revising paragraphs (j)(1) and (k)(2) to read as follows:

§ 3280.305

Structural design requirements.

* * * * *

(j) * * *

(1) All welds must be made in accordance with the applicable provisions of the Specification for Structural Steel Buildings, AISC 360 (incorporated by reference, see § 3280.4); the North American Specification for the Design of Cold-Formed Steel Structural Members, AISI S100 (incorporated by reference, see § 3280.4); and the Specification for the Design of Cold-Formed Stainless Steel Structural Members, SEI/ASCE 8 (incorporated by reference, see § 3280.4).

* * * * *

(k) * * *

(2) For roofs with slopes less than 7:12 that contain an attic area or for portions of roofs with slopes 7:12 or greater that do meet the ceiling height/living space requirements of the standards, the attic floor must be designed for a storage live load of 20 pounds per square foot (psf).

(i) Attic area as used within this section are those spaces where the maximum clear height between joist and rafters is 42 inches or greater or where there are two or more adjacent trusses with web configurations capable of accommodating an assumed rectangle 42 inches high by 24 inches in width or greater, within the plane of the trusses.

(ii) The live load need only be applied to those portions of the joist or truss bottom chords where all of the following criteria are met:

(A) The attic area is accessible from an opening not less than 20 inches in width and 30 inches in length that is located where the clear height in the attic is a minimum of 30 inches; and

(B) The slope of the joists of the truss bottom chord are no greater than 2 inches vertical to 12 inches horizontal; and

(C) Required insulation depth is less than the joist or truss bottom chord member depth.

20. Amend § 3280.307 by adding paragraph (f) to read as follows:

§ 3280.307

Resistance to elements and use.

* * * * *

(f) The exterior wall envelope must be designed and constructed in a manner that prevents the accumulation of water within the wall assembly by providing a Water Resistive Barrier (WRB) behind the exterior cladding and a means of draining water that enters the assembly.

21. Add § 3280.309 to subpart D to read as follows:

§ 3280.309

Standard for vinyl siding and polypropylene siding used in manufactured homes.

(a) Scope. This section establishes the requirements for vinyl siding and ( print page 75750) polypropylene siding used in manufactured homes.

(b) Standards —(1) Vinyl siding. All vinyl siding must comply with the requirements of ASTM D3679 (incorporated by reference, see § 3280.4) and must be certified or listed and labeled as conforming to those requirements.

(2) Polypropylene siding. All polypropylene siding must comply with the requirements of ASTM D7254 (incorporated by reference, see § 3280.4) and must be certified or listed and labeled as conforming to those requirements.

(c) Installation. Vinyl siding and soffit installation must be installed in accordance with the manufacturer's installation instructions. Vinyl siding and soffit installation must be based on ASTM D4756 (incorporated by reference, see § 3280.4).

22. Amend § 3280.403 by revising paragraphs (b)(1), (b)(2) introductory text, (d)(1), and (e) to read as follows:

§ 3280.403

Requirements for windows, sliding glass doors, and skylights.

* * * * *

(b) Standard. (1) All primary windows and sliding glass doors must comply with AAMA 1701.2 or AAMA/WDMA/CSA 101/I.S.2/A440 (both incorporated by reference, see § 3280.4), except the exterior and interior pressure tests must be conducted at the minimum design wind loads required for components in § 3280.305(c)(1).

(2) All skylights must comply with AAMA/WDMA/CSA 101/I.S.2/A440 (incorporated by reference, see § 3280.4).

* * * * *

(d) * * *

(1) Safety glazing materials, where used shall meet ANSI Z97.1 (incorporated by reference, see § 3280.4).

* * * * *

(e) Certification. All primary windows and sliding glass doors to be installed in manufactured homes must be certified as complying with AAMA 1701.2 or AAMA/WDMA/CSA 101/I.S.2/A440 (both incorporated by reference, see § 3280.4). This certification must be based on tests conducted at the design wind loads specified in § 3280.305(c)(1).

(1) All such windows and doors must show evidence of certification by affixing a quality certification label to the product from an independent product certification body accredited to ISO/IEC 17065 (incorporated by reference, see § 3280.4).

(2) In determining certifiability of the products, an independent quality assurance agency must conduct pre-production specimen tests in accordance with AAMA 1702.2 or AAMA/WDMA/CSA 101/I.S.2/A440 (both incorporated by reference, see § 3280.4). Further, such agency must inspect the product manufacturer's facility at least twice per year.

(3) All skylights installed in manufactured homes must be certified as complying with AAMA 1701.2 or AAMA/WDMA/CSA 101/I.S.2/A440 (both incorporated by reference, see 3280.4).

* * * * *

23. Amend § 3280.404 by revising paragraphs (b) and (e) to read as follows:

§ 3280.404

Standard for egress windows and devices for use in manufactured homes.

* * * * *

(b) Performance. Egress windows including auxiliary frame and seals, if any, must meet all requirements of AAMA 1701.2 and AAMA 1704 or AAMA/WDMA/CSA 101/I.S.2/A440 (all incorporated by reference, see § 3280.4).

(1) Loading. Exterior and interior pressure tests for components and cladding must be conducted meeting or exceeding the minimum design wind loads required by § 3280.305(c)(1).

(2) Dimensions. All egress systems must have a minimum clear horizontal dimension of 20 inches and a minimum clear vertical dimension of 24 inches and have a clear opening of at least 5 ft² .

* * * * *

(e) Certification of egress windows and devices. (1) Egress windows and devices must be listed in accordance with the procedures and requirements of AAMA 1701.2 and AAMA 1704 or AAMA/WDMA/CSA 101/I.S.2/A440 (all incorporated by reference, see § 3280.4). This certification must be based on tests conducted meeting or exceeding the minimum design wind loads specified in § 3280.305(c)(1).

(2) All such windows and devices must show evidence of certification by affixing a quality certification label to the product from an independent product certification body accredited to ISO/IEC 17065 (incorporated by reference, see § 3280.4).

* * * * *

24. Amend § 3280.405 by revising paragraphs (b), (c), and (e) to read as follows:

§ 3280.405

Standard for swinging exterior passage doors for use in manufactured homes.

* * * * *

(b) Performance requirements. The design and construction of exterior door units must meet all requirements of AAMA 1702.2 or AAMA/WDMA/CSA 101/I.S.2/A440 (both incorporated by reference, see § 3280.4).

(c) Materials and methods. Any material or method of construction must conform to the performance requirements as outlined in paragraph (b) of this section. Plywood must be exterior type and preservative treated in accordance with WDMA I.S.4 (incorporated by reference, see § 3280.4).

* * * * *

(e) Certification. All swinging exterior doors to be installed in manufactured homes must be certified as complying with AAMA 1702.2 or AAMA/WDMA/CSA 101/I.S.2/A440 (both incorporated by reference, see § 3280.4).

(1) All such doors must show evidence of certification by affixing a quality certification label to the product from an independent product certification body accredited to ISO/IEC 17065 (incorporated by reference, see § 3280.4).

(2) In determining certifiability of the products, an independent quality assurance agency must conduct a pre-production specimen test in accordance with AAMA 1702.2 or AAMA/WDMA/CSA 101/I.S.2/A440 (both incorporated by reference, see § 3280.4).

* * * * *

25. Amend § 3280.504 by revising paragraphs (a)(1) and (c) to read as follows:

§ 3280.504

Condensation control and installation of vapor retarders.

(a) * * *

(1) In U_o Value Zones 2 and 3, ceilings must have a vapor retarder with a permeance of not greater than 1 perm as measured by ASTM E96/E96M (incorporated by reference, see § 3280.4), installed on the living space side of the roof cavity.

* * * * *

(c) Liquid applied vapor retarders. Each liquid applied vapor retarder must be tested by a nationally recognized testing agency for use on the specific substrate to which it is applied. The test report must include the perm rating, as measured by ASTM E96/E96M (incorporated by reference, see § 3280.4), and associated application rate for each specific substrate.

* * * * *

26. Amend § 3280.510 by revising the first sentence of the introductory text to read as follows:

§ 3280.510

Heat loss certificate.

The manufactured home manufacturer must permanently affix ( print page 75751) the following “Certificate” to an interior surface of each dwelling unit that is readily visible to the occupant.* * *

* * * * *

27. Amend § 3280.511 by revising the first sentence of paragraph (a) introductory text and paragraph (b) to read as follows:

§ 3280.511

Comfort cooling certificate and information.

(a) The manufactured home manufacturer must permanently affix a “Comfort Cooling Certificate” to an interior surface of each dwelling unit that is readily visible to the occupant. * * *

* * * * *

(b) For each home designated as suitable for central air conditioning the manufacturer shall provide the maximum central manufactured home air conditioning capacity certified in accordance with the ANSI/AHRI Standard 210/240 with Addenda 1 and 2 (incorporated by reference, see § 3280.4) and in accordance with § 3280.715(a)(3). If the capacity information provided is based on entrances to the air supply duct at other than the furnace plenum, the manufacturer shall indicate the correct supply air entrance and return air exit locations.

* * * * *

28. Amend § 3280.603 by revising paragraph (b)(4)(ii) to read as follows:

§ 3280.603

General requirements.

* * * * *

(b) * * *

(4) * * *

(ii) A statement in the installation instructions required by § 3280.306(b), stating that if the heat tape or pipe heating cable is used, it must be listed or certified for its intended purpose.

* * * * *

29. Revise and republish § 3280.604 to read as follows:

§ 3280.604

Materials.

(a) Minimum standards. Materials, devices, fixtures, fittings, equipment, appliances, appurtenances and accessories shall conform to one of the standards listed in this section (all incorporated by reference, see § 3280.4) and be free from defects. Where an appropriate standard is not listed in this section or a standard not listed is preferred, the item may be used if it is listed. A listing is also required when so specified in other sections of this subpart.

(b) Compliance when there is more than one listed standard. Where more than one standard is referenced for a particular material or component, compliance with only one of those standards is acceptable. Exceptions:

(1) When one of the reference standards requires evaluation of chemical, toxicity or odor properties which are not included in the other standard, then conformance to the applicable requirements of each standard shall be demonstrated; or

(2) When a plastic material or component is not covered by the standards in this section, it must be certified as non-toxic in accordance with Drinking water system components-Health effects—ANSI/NSF 61 (incorporated by reference, see § 3280.4).

(c) List of standards. Standards for some of the generally used materials and methods of construction are listed as following:

(1) Ferrous pipe and fittings. (i) Gray Iron Threaded Fittings—ANSI/ASME B16.4.

(ii) Malleable Iron Threaded Fittings—ANSI/ASME B16.3.

(iii) Material and Property Standard for Special Cast Iron Fittings—IAPMO PS 5.

(iv) Welded and Seamless Wrought Steel Pipe—ANSI/ASME B36.10.

(v) Standard Specification for Pipe, Steel, Black and Hot-Dipped, Zinc-Coated, Welded and Seamless—ASTM A53/A53M.

(vi) Pipe Threads, General Purpose (Inch)—ANSI/ASME B1.20.1.

(vii) Standard Specification for Cast Iron Soil Pipe and Fittings—ASTM A74.

(viii) Standard Specification for Hubless Cast Iron Soil Pipe and Fittings for Sanitary and Storm Drain, Waste, and Vent Piping Applications—CISPI-301.

(2) Nonferrous pipe and fittings. (i) Standard Specification for Seamless Copper Pipe, Standard Sizes—ASTM B42.

(ii) Standard Specification for General Requirements for Wrought Seamless Copper and Copper-Alloy Tube—ASTM B251.

(iii) Standard Specification for Seamless Copper Water Tube—ASTM B88.

(iv) Standard Specification for Copper Drainage Tube (DWV)—ASTM B306.

(v) Wrought-Copper and Copper Alloy Solder-Joint Pressure Fitting—ASME/ANSI B16.22.

(vi) Wrought Copper and Wrought Copper Alloy Solder-Joint Drainage Fittings-DWV—ASME/ANSI B16.29.

(vii) Cast Copper Alloy Solder-Joint Pressure Fittings—ANSI B16.18.

(viii) Cast Copper Alloy Solder-Joint Drainage Fittings-DWV—ASME B16.23.

(ix) Cast Copper Alloy Fittings for Flared Copper Tubes—ASME/ANSI B16.26.

(x) Standard Specification for Seamless Red Brass Pipe, Standard Sizes—ASTM B43.

(xi) Cast Bronze Threaded Fittings, Classes 125 and 250—ANSI/ASME B16.15.

(3) Plastic pipe and fittings. (i) Standard Specification Acrylonitrile-Butadiene-Styrene (ABS) Schedule 40 Plastic Drain, Waste, and Vent Pipe and Fittings—ASTM D2661.

(ii) Standard Specification for Poly (Vinyl Chloride) (PVC) Plastic Drain, Waste, and Vent Pipe and Fittings—ASTM D2665.

(iii) Standard Specification for Drain, Waste, and Vent (DWV) Plastic Fittings Patterns—ASTM D3311.

(iv) Standard Specification for Acrylonitrile-Butadiene-Styrene (ABS) Schedule 40, Plastic Drain, Waste, and Vent Pipe with a Cellular Core—ASTM F628.

(v) Standard Specification for Chlorinated Poly (Vinyl Chloride) (CPVC) Plastic Hot- and Cold-Water Distribution Systems—ASTM D2846.

(vi) Standard Specification for Polybutylene (PB) Plastic Hot- and Cold-Water Distribution Systems—ASTM D3309.

(vii) Plastic Piping Components and Related Materials—ANSI/NSF 14.

(viii) Standard Specification for Crosslinked Polyethylene (PEX) Tubing—ASTM F876.

(ix) Standard Specification for Crosslinked Polyethylene (PEX) Plastic Hot- and Cold-Water Distribution Systems—ASTM F877.

(4) Miscellaneous. (i) Standard Specification for Rubber Gaskets for Cast Iron Soil Pipe and Fittings, ASTM C564.

(ii) Backflow Valves—ANSI A112.14.1.

(iii) Plumbing Fixture Setting Compound—TTP 1536A.

(iv) Material and Property Standard for Cast Brass and Tubing P-Traps—IAPMO PS 2.

(v) Relief Valves for Hot Water Supply Systems—ANSI Z21.22.

(vi) Standard Specification for Solvent Cement for Acrylonitrile-Butadiene-Styrene (ABS) Plastic Pipe and Fittings—ASTM D2235.

(vii) Standard Specification for Solvent Cements for Poly (Vinyl Chloride) (PVC) Plastic Piping Systems—ASTM D2564.

(viii) Specification for Neoprene Rubber Gaskets for HUB and Spigot Cast Iron Soil Pipe and Fittings—CISPI-HSN.

(ix) Plumbing System Components for Manufactured Homes and Recreational Vehicles—ANSI/NSF 24. ( print page 75752)

(x) Material and Property Standard for Diversion Tees and Twin Waste Elbow—IAPMO PS 9.

(xi) Material and Property Standard for Flexible Metallic Water Connectors—IAPMO PS 14.

(xii) Material and Property Standard for Dishwasher Drain Airgaps—IAPMO PS 23.

(xiii) Material and Property Standards for Backflow Prevention Assemblies—IAPMO PS 31.

(xiv) Performance Requirements for Air Admittance Valves for Plumbing Drainage Systems, Fixture and Branch Devices—ASSE 1051.

(xv) Drinking Water System Components-Health Effects—ANSI/NSF 61.

(5) Plumbing fixtures. (i) Plumbing Fixtures (General Specifications)—FS WW-P-541E/GEN.

(ii) Vitreous China Plumbing Fixtures—ANSI/ASME A112.19.2(M).

(iii) Enameled Cast Iron Plumbing Fixtures—ANSI/ASME A112.19.1M.

(iv) Porcelain Enameled Formed Steel Plumbing Fixtures—ANSI/ASME A112.19.4(M).

(v) Plastic Bathtub Units with Addenda Z124.1a and Z124.1b—ANSI Z124.1.

(vi) Standard for Porcelain Enameled Formed Steel Plumbing Fixtures—IAPMO TSC 22.

(vii) Plastic Shower Receptors and Shower Stalls with Addendum Z124.2a—ANSI Z124.2.

(viii) Stainless Steel Plumbing Fixtures (Designed for Residential Use)—ANSI/ASME A112.19.3M.

(ix) Material and Property Standard for Drains for Prefabricated and Precast Showers—IAPMO PS 4.

(x) Plastic Lavatories with Addendum Z124.3a—ANSI Z124.3.

(xi) Standard for Safety Glazing Materials used in Buildings—Safety Performance Specifications and Methods of Test—ANSI Z97.1.

(xii) Water Heater Relief Valve Drain Tubes—ASME A112.4.1.

(xiii) Flexible Water Connectors—ASME A112.18.6.

(xiv) Performance Requirements for Backflow Protection Devices and Systems in Plumbing Fixture Fittings—ASME A112.18.3M.

(xv) Non-Vitreous Ceramic Plumbing Fixtures—ASME A112.19.9M.

(xvi) Dual Flush Devices for Water Closets—ASME A119.19.10.

(xvii) Deck Mounted Bath/Shower Transfer Valves with Integral Backflow Protection—ASME A112.18.7.

(xviii) Plastic Fittings for Connecting Water Closets to the Sanitary Drainage System—ASME A112.4.3.

(xix) Hydraulic Performance Requirements for Water Closets and Urinals—ASME A112.19.6.

(xx) Plumbing Fixture Fittings—ASME/ANSI A112.18.1M.

(xxi) Trim for Water Closet, Bowls, Tanks, and Urinals—ANSI A112.19.5.

(xxii) Plastic Water Closets, Bowls, and Tanks with Addenda Z124.4a—ANSI Z124.4.

(xxiii) Plastic Toilet (Water Closets) Seats—ANSI Z124.5.

(xxiv) Prefabricated Plastic Spa Shells—ANSI Z124.7.

(xxv) Whirlpool Bathtub Appliances—ASME/ANSI A112.19.7M.

(xxvi) Plastic Urinal Fixtures—ANSI Z-124.9.

(xxvii) Performance Requirements for Automatic Compensating Values for Individual Shower and Tub/Shower Combinations—ASSE 1016.

(xxviii) Performance Requirements for Pressurized Flushing Devices (Flushometers) for Plumbing Fixtures—ASSE 1037.

(xxix) Performance Requirements for Water Closet Flush Tank Fill Valves (Ballcocks)—ASSE 1002.

(xxx) Performance Requirements for Hand-held Showers—ASSE 1014.

(xxxi) Hydrants for Utility and Maintenance Use—ANSI/ASME A112.21.3M.

(xxxii) Performance Requirements for Home Laundry Equipment—ASSE 1007.

(xxxiii) Performance Requirements for Hot Water Dispensers, Household Storage Type Electrical—ASSE 1023.

(xxxiv) Plumbing Requirements for Residential Use (Household) Dishwashers—ASSE 1006.

(xxxv) Performance Requirements for Household Food Waste Disposer Units—ASSE 1008.

(xxxvi) Performance Requirements for Temperature Activated Mixing Valves for Primary Domestic Use—ASSE 1017.

(xxxv) Water Hammer Arresters—ANSI A112.26.1.

(xxxvi) Suction Fittings for Use in Swimming Pools, Wading Pools, Spas, Hot Tubs, and Whirlpool Bathtub Appliances—ASME/ANSI A112.19.8M.

(xxxvii) Air Gaps in Plumbing Systems—ASME A112.1.2.

(xxxviii) Performance Requirements for Diverters for Plumbing Faucets with Hose Spray, Anti-Siphon Type, Residential Applications—ASSE 1025.

(xxxix) Performance Requirements for Pipe Applied Atmospheric Type Vacuum Breakers—ASSE 1001.

(xl) Performance Requirements for Hose Connection Vacuum Breakers—ASSE 1011.

(xli) Performance Requirements for Wall Hydrants, Frost Proof Automatic Draining, Anti-Backflow Types—ANSI/ASSE 1019.

(xlii) Performance Requirements for Automatic Compensating Values for Individual Shower and Tub/Shower Combinations—ASSE 1016.

(xliii) Performance Requirements for Water Temperature Limiting Devices—ASSE 1070.

30. Amend § 3280.607 by revising paragraphs (b)(3) and (c)(6)(iv) to read as follows:

§ 3280.607

Plumbing fixtures.

* * * * *

(b) * * *

(3) Shower compartment. (i) Each compartment stall must be provided with an approved watertight receptor with sides and back extending with sides and back extending at least 1 inch above the finished dam or threshold. Except as provided by paragraph (b)(3)(v) of this section, the depth of a shower receptor must not be less than 2 inches or more than 9 inches measured from the top of the finished dam or threshold to the top of the drain. The wall area must be constructed of smooth, non-corrosive, and non-absorbent materials to a height not less than 6 feet above the bathroom floor level. Such walls must form a watertight joint with each other and with the bathtub, receptor or shower floor. The floor or compartment must slope uniformly to the drain not less than one-fourth nor more than 1/2 inch per foot.

(ii) The joint around the drain connection shall be made watertight by a flange, clamping ring, or other approved listed means.

(iii) Shower doors and tub and shower enclosures must be constructed so as to be waterproof and, if glazed, glazing must comply with ANSI Z97.1 (incorporated by reference, see § 3280.4)

(iv) Prefabricated plumbing fixtures shall be approved or listed.

(v) Thresholds in roll-in-type shower compartments must be 1/2 inch maximum in height in accordance with paragraph (b)(3)(vi) of this section. In transfer type shower compartments, thresholds 1/2 inch maximum in height must be beveled, rounded, or be vertical.

(vi) Changes in level of 1/4 inch maximum in height must be permitted to be vertical. Changes in level greater than 1/4 inch in height and not more than 1/2 inch maximum in height must be beveled with a slope not steeper than 1:2.

(vii) Shower and tub-shower combination valves must be balanced pressure, thermostatic, or combination mixing valves that conform to the requirements of ASSE 1016 (incorporated by reference, see § 3280.4). Such valves must be equipped ( print page 75753) with handle position stops that are adjustable in accordance with the valve manufacturer's instructions and to a maximum setting of 120 °F. Hot water supplied to bathtubs and whirlpool bathtubs are to be limited to a temperature of not greater than 120 °F by a water temperature limiting device that conforms to the requirements of ASSE 1070 (incorporated by reference, see § 3280.4).

* * * * *

(c) * * *

(6) * * *

(iv) Electrical. Wiring must comply with Articles 680.70, 680.71, and 680.72 of NFPA 70 (incorporated by reference, see § 3280.4).

31. Amend § 3280.609 by revising paragraph (a)(2) to read as follows:

§ 3280.609

Water distribution systems.

(a) * * *

(2) Hot water supply. Each dwelling unit equipped with a kitchen sink, and bathtub and/or shower must be provided with a hot water supply system including a listed water heater.

* * * * *

32. Amend § 3280.611 by revising paragraph (c)(5) to read as follows:

§ 3280.611

Vents and venting.

* * * * *

(c) * * *

(5) The distance of the fixture trap from the vent must not exceed the values given in the following table:

Table 1 to Paragraph (c)(5) —Maximum Distance of Fixtures From Vent Trap

Size of fixture drain (inches)	Distance trap to vent
1 1/4	5 ft.
1 1/2	6 ft.
2	8 ft.
3	12 ft.

* * * * *

33. Amend § 3280.702 by revising the definitions for “Class 0 air ducts and air connectors” and “Class 1 air ducts and air connectors” to read as follows:

§ 3280.702

Definitions.

* * * * *

Class 0 air ducts and air connectors means air ducts and air connectors having a fire hazard classification of zero when tested in accordance with UL 181 (incorporated by reference, see § 3280.4).

Class 1 air ducts and air connectors means air ducts and air connectors having a flame spread rating of not over 25 without evidence of continued progressive combustion and a smoke developed rating of not over 50 when tested in accordance with UL 181 (incorporated by reference, see § 3280.4).

* * * * *

34. Revise § 3280.703 to read as follows:

§ 3280.703

Minimum standards.

Heating, cooling, and fuel burning appliances and systems in manufactured homes shall be free of defects and shall conform to applicable standards (incorporated by reference, see § 3280.4) in this section unless otherwise specified in this part. When more than one standard is referenced, compliance with any one such standard shall meet the requirements of this part.

(a) Appliances. (1) Liquid Fuel-Burning Heating Appliances for Manufactured Homes and Recreational Vehicles—UL 307A.

(2) Fixed and Location-Dedicated Electric Room Heaters—UL 2021.

(3) Electric Baseboard Heating Equipment—UL 1042.

(4) Electric Central Air Heating Equipment—UL 1096.

(5) Gas-Burning Heating Appliances for Manufactured Homes and Recreational Vehicles—UL 307B.

(6) Gas Clothes Dryers Volume I, Type 1 Clothes Dryers—ANSI Z21.5.1 (CSA Group).

(7) Gas-fired Water Heaters, Volume III, Storage Water Heaters with Input Ratings Above 75,000 BTU per Hour, Circulating and Instantaneous—ANSI Z21.10.3 (CSA Group).

(8) Gas-Fired, Heat Activated Air Conditioning and Heat Pump Appliances—ANSI Z21.40.1 (CSA Group).

(9) Gas-Fired Central Furnaces (Except Direct Vent Systems)—ANSI Z21.47(CSA Group).

(10) Connectors for Outdoor Gas Appliances and Manufactured Homes—ANSI Z21.75 (CSA Group).

(11) Decorative Gas Appliances for Installation in Solid Fuel Burning Fireplaces—RADCO DS-010.

(12) Household Cooking Gas Appliances—ANSI Z21.1 (CSA Group).

(13) Refrigerators Using Gas Fuel—ANSI Z21.19 (CSA Group).

(14) Gas Water Heaters, Volume I, Storage Water Heaters with Input Ratings of 75,000 BTU per hour or Less—ANSI Z21.10.1 (CSA Group).

(15) Household Electric Storage Tank Water Heaters—UL 174.

(16) Household and Similar Electrical Appliances—Part 2-40: Particular Requirements for Electrical Heat Pumps, Air-Conditioners and Dehumidifiers—UL 60335-2-40.

(17) Smoke Detectors for Fire Protective Signaling Systems—UL 268.

(18) Single and Multiple Station Carbon Monoxide Alarms—UL 2034.

(19) Electric Heating Appliances—UL 499.

(b) Ferrous pipe and fittings. (1) Standard Specification for Pipe, Steel, Black and Hot-Dipped, Zinc-Coated, Welded and Seamless—ASTM A53/A53M.

(2) Standard Specification for Electric-Resistance-Welded Coiled Steel Tubing for Gas and Fuel Oil Lines—ASTM A539.

(3) Pipe Threads, General Purpose (Inch)—ANSI/ASME B1.20.1.

(4) Welding and Seamless Wrought Steel Pipe—ANSI/ASME B36.10.

(c) Nonferrous pipe, tubing, and fittings. (1) Standard Specification for Seamless Copper Water Tube—ASTM B88.

(2) Standard Specification for Seamless Copper Tube for Air Conditioning and Refrigeration Field Service—ASTM B280.

(3) Connectors for Gas Appliances—ANSI Z21.24 (CSA Group).

(4) Manually Operated Gas Valves for Appliances, Appliance Connector Valves and Hose End Valves—ANSI Z21.15 (CSA Group).

(5) Standard for Gas Supply Connectors for Manufactured Homes—IAPMO TS 9.

(6) Standard Specification for General Requirements for Wrought Seamless Copper and Copper-Alloy Tube—ASTM B251.

(7) Standard Specification for Seamless Copper Pipe, Standard Sizes—ASTM B42.

(d) Miscellaneous. (1) Factory-Made Air Ducts and Air Connectors—UL 181.

(2) Closure Systems for use with Rigid Air Ducts and Air Connectors—UL 181A.

(3) Closure Systems for use with Flexible Air Ducts and Air Connectors—UL 181B.

(4) Safety Glazing Materials Used in Buildings—Safety Performance Specifications and Methods of Test—ANSI Z97.1.

(5) Tube Fittings for Flammable and Combustible Fluids, Refrigeration Service, and Marine Use—UL 109.

(6) Pigtails and Flexible Hose Connectors for LP-Gas—UL 569.

(7) Roof Jacks for Manufactured Homes and Recreational Vehicles—UL 311.

(8) Relief Valves for Hot Water Supply Systems—ANSI Z21.22.

(9) Automatic electrical controls for household and similar use—Part 2-5: Particular requirements for automatic electrical burner control systems—ANSI Z21.20 (CSA Group). ( print page 75754)

(10) Automatic Valves for Gas Appliances—ANSI Z21.21 (CSA Group).

(11) Gas Appliance Thermostats—ANSI Z21.23 (CSA Group).

(12) Gas Vents—UL 441.

(13) Installation of Oil-Burning Equipment—NFPA 31.

(14) National Fuel Gas Code—NFPA 54/ANSI Z223.1.

(15) Warm Air Heating and Air Conditioning Systems—NFPA 90B.

(16) Liquefied Petroleum Gases Code—NFPA 58.

(17) Flares for Tubing—SAE J533.

(18) Factory Built Chimneys for Residential Type and Building Heating Appliances—UL 103.

(19) Factory-Built Fireplaces—UL 127.

(20) Solid-Fuel Type Room Heaters—UL 1482.

(21) Fireplace Stoves—UL 737.

(22) Rating of Unitary Air-Conditioning and Air-Source Heat Pump Equipment—ANSI/AHRI Standard 210/240 with Addenda 1 and 2.

(23) Ventilation and Acceptable Indoor Air Quality in Low-Rise Residential Buildings—ANSI/ASHRAE 62.2.

(24) Requirements for Gas Connectors for Connection of Fixed Appliances for Outdoor Installation, Park Trailers, and Manufactured (Mobile) Homes to the Gas Supply—AGA No. 3.

35. Amend § 3280.705 by revising paragraphs (b)(1), (3), and (5), (c)(2), (e), (f), (j), (l)(1), (l)(2)(ii), and (l)(3) to read as follows:

§ 3280.705

Gas piping systems.

* * * * *

(b) * * *

(1) Steel or wrought-iron pipe shall comply with ASME B36.10 (incorporated by reference, see § 3280.4). Threaded brass pipe in iron pipe sizes may be used. Threaded brass pipe shall comply with ASTM B43. (incorporated by reference, see § 3280.4).

* * * * *

(3) Copper tubing must be annealed type, Grade K or L, conforming to ASTM B88 (incorporated by reference, see § 3280.4), or must comply with the ASTM B280 (incorporated by reference, see § 3280.4). Copper tubing must be internally tinned.

* * * * *

(5) Corrugated stainless steel tubing (CSST) systems must be listed and installed in accordance with ANSI LC 1 (CSA Group; incorporated by reference, see § 3280.4), and the requirements of this section.

(c) * * *

(2) The connection(s) between units must be made with a connector(s) listed for exterior use or direct plumbing sized in accordance with paragraph (d) of this section. A shutoff valve of the non-displaceable rotor type conforming to ANSI Z21.15 (CSA Group; incorporated by reference, see § 3280.4), suitable for outdoor use must be installed at each crossover point upstream of the connection.

* * * * *

(e) Joints for gas pipe. All pipe joints in the piping system, unless welded or brazed, shall be threaded joints that comply with ANSI/ASME B1.20.1 (incorporated by reference, see § 3280.4). Right and left nipples or couplings shall not be used. Unions, if used, shall be of ground joint type. The material used for welding or brazing pipe connections shall have a melting temperature in excess of 1,000 °F.

(f) Joints for tubing. (1) Tubing joints shall be made with either a single or a double flare of 45 degrees in accordance with SAE J533 (incorporated by reference, see § 3280.4) or with other listed vibration-resistant fittings, or joints may be brazed with material having a melting point exceeding 1,000 °F. Metallic ball sleeve compression-type tubing fittings shall not be used.

(2) Steel tubing joints shall be made with a double-flare in accordance with SAE J533 (incorporated by reference, see § 3280.4).

* * * * *

(j) Gas supply connection. When gas appliances are installed, at least one gas supply connection must be provided on each dwelling unit. The connection must not be located beneath an exit door. Where more than one connection is provided, the piping system must be sized to provide adequate capacity from each supply connection.

* * * * *

(l) * * *

(1) General. A listed LP-Gas flexible connection conforming to UL 569 (incorporated by reference, see § 3280.4), or equal, must be supplied when LP-Gas cylinder(s) and regulator(s) are supplied.

(2) * * *

(ii) The outlet must be provided with an approved quick-disconnect device, which must be designed to provide a positive seal on the supply side of the gas system when the appliance is disconnected. A shutoff valve of the non-displaceable rotor type conforming to ANSI Z21.15 (CSA Group; incorporated by reference, see § 3280.4), must be installed immediately upstream of the quick-disconnect device. The complete device must be provided as part of the original installation.

* * * * *

(3) Valves. A shutoff valve must be installed in the fuel piping at each appliance inside the dwelling unit structure or connector in addition to any valve on the appliance and so arranged to be accessible to permit servicing of the appliance and removal of its components. The shutoff valve must be located within 6 feet of any cooking appliance and within 3 feet of any other appliance. A shutoff valve may serve more than one appliance if located as required by this paragraph (l)(3). The shutoff valve must be of the non-displaceable rotor type and conform to ANSI Z21.15 (CSA Group; incorporated by reference, see § 3280.4).

* * * * *

36. Amend § 3280.706 by revising paragraphs (b)(1) and (3), and (d) to read as follows:

§ 3280.706

Oil piping systems.

* * * * *

(b) * * *

(1) Steel or wrought-iron pipe shall comply with ANSI/ASME B36.10 (incorporated by reference, see § 3280.4). Threaded copper or brass paper in iron pipe sizes may be used.

* * * * *

(3) Copper tubing must be annealed type, Grade K or L conforming to ASTM B88 (incorporated by reference, see § 3280.4), or shall comply with ASTM B280 (incorporated by reference, see § 3280.4).

* * * * *

(d) Joints for oil piping. All pipe joints in the piping system, unless welded or brazed, shall be threaded joints which comply with ANSI/ASME B1.20.1 (incorporated by reference, see § 3280.4). The material used for brazing pipe connections shall have a melting temperature in excess of 1,000 °F.

* * * * *

37. Amend § 3280.707 by revising paragraphs (a) introductory text, (d)(2), and (f) introductory text to read as follows:

§ 3280.707

Heat producing appliances.

(a) Heat producing appliances and vents, roof jacks and chimneys necessary for their installation in manufactured homes must be listed or certified for residential use by a nationally recognized testing agency.

* * * * *

(d) * * *

(2) All gas and oil-fired automatic storage water heaters shall have a recovery efficiency, E, and a standby ( print page 75755) loss, S, as described below. The method of test of E and S shall be as described in section 2.7 of Gas Water heaters, Vol. I, Storage Water Heaters with Input/Ratings of 75,000 BTU per hour or less, ANSI Z21.10.1 (CSA Group; incorporated by reference, see § 3280.4), except that for oil-fired units. CF = 1.0, Q = total gallons of oil consumed and H = total heating value of oil in BTU/gallon.

Table 1 to Paragraph (d) (2)

Storage capacity in gallons	Recovery efficiency	Standby loss
Less than 25	At least 75 percent	Not more than 7.5 percent.
25 up to 35	00	Not more than 7 percent.
35 or more	00	Not more than 6 percent.

* * * * *

(f) Oil-fired heating equipment. All oil-fired heating equipment must conform to UL 307A (incorporated by reference, see § 3280.4) and be installed in accordance with NFPA 31 (incorporated by reference, see § 3280.4). Regardless of the requirements of the above-referenced standards, or any other standards referenced in this part, the following are not required:

* * * * *

38. Amend § 3280.709 by

a. Revising paragraphs (a) introductory text and (g) introductory text;

b. Adding a reserved paragraph (g)(2); and

c. Revising paragraph (h).

The revisions and addition read as follows:

§ 3280.709

Installation of appliances.

(a) The installation of each appliance must conform to the terms of its listing and the manufacturer's instructions. Every appliance must be secured in place to avoid displacement. For the purpose of servicing and replacement, each appliance must be both accessible and removable.

* * * * *

(g) Solid fuel burning fireplaces and fireplace stoves listed for residential use may be installed in manufactured homes provided they and their installation conform to paragraphs (g)(1)(i) through (vii) of this section. A fireplace or fireplace stove is not to be considered as a heating facility for determining compliance with subpart F of this part.

* * * * *

(h) A corrosion-resistant water drip collection and drain pan must be installed under each storage tank-type water heater or a hot water storage tank that will allow water leaking from the water heater to drain to the exterior of the manufactured home, or to a drain.

39. Revise § 3280.711 to read as follows:

§ 3280.711

Instructions.

Operating instructions for each appliance must be provided with the homeowner's manual. An additional copy of the operating instructions must be provided with each appliance unless the appliance is affixed with a permanent Quick Response (QR) Code.

40. Amend § 3280.714 by revising paragraphs (a)(1) and (2) to read as follows:

§ 3280.714

Appliances, cooling.

(a) * * *

(1) Mechanical air conditioners shall be rated in accordance with the ANSI/AHRI Standard 210/240 with Addenda 1 and 2 (incorporated by reference, see § 3280.4) and certified by AHRI or other nationally recognized testing agency capable of providing follow-up service.

(i) Electric motor-driven unitary air-cooled air conditioners and heat pumps in the cooling mode with rated capacity less than 65,000 BTU/hour (19,045 watts), when rated at AHRI standard rating conditions in ANSI/AHRI Standard 210/240 with Addenda 1 and 2 (incorporated by reference, see § 3280.4), must have seasonal energy efficiency (SEER) values not less than as specified in 10 CFR part 430, Energy Conservation Program for Consumer Products: Central Air Conditioners and Heat Pumps Energy Conservation Standards.

(ii) Heat pumps must be certified to comply with all requirements of the ANSI/AHRI Standard 210/240 with Addenda 1 and 2 (incorporated by reference, see § 3280.4). Electric motor-driven vapor compression heat pumps with supplemental electrical resistance heat must be sized to provide by compression at least 60 percent of the calculated annual heating requirements for the manufactured home being served. A control must be provided and set to prevent operation of supplemental electrical resistance heat at outdoor temperatures above 40 °F (4 °C), except for defrost conditions. Electric motor-driven vapor compression heat pumps with supplemental electric resistance heat conforming to ANSI/AHRI Standard 210/240 with Addenda 1 and 2, must have Heating Season Performance Factor (HSPF) efficiencies not less than as specified in the 10 CFR part 430, Energy Conservation Program for Consumer Products: Central Air Conditioners and Heat Pumps Energy Conservation Standards.

(iii) Electric motor-driven vapor compression heat pumps with supplemental electric resistance heat conforming to ANSI/AHRI Standard 210/240 with Addenda 1 and 2 (incorporated by reference, see § 3280.4), shall show coefficient of performance ratios not less than shown below:

Table 1 to Paragraph (a)(1)(iii) —COP

Temperature degrees Fahrenheit	Coefficient of performance
47	2.5
17	1.7
0	1.0

(2) Gas fired absorption air conditioners must be listed or certified in accordance with ANSI Z21.40.1, (CSA Group; incorporated by reference, see § 3280.4), and certified by a nationally recognized testing agency capable of providing follow-up service.

* * * * *

41. Amend § 3280.715 by revising paragraphs (a)(1), (c), and (e) introductory text to read as follows:

§ 3280.715

Circulating air systems.

(a) * * *

(1) Supply air ducts, fittings, and any dampers contained there-in must be made of galvanized steel, tin-plated steel, or aluminum, or must be listed as Class 0 or Class 1 air ducts in accordance with UL 181 (incorporated by reference, see § 3280.4). Air ducts and air connectors located within three feet of the furnace discharge must be rated to withstand the maximum air discharge temperature of the equipment. Air connectors must not be used for exterior manufactured home duct connections. A duct system integral ( print page 75756) with the structure must be of durable construction that can be demonstrated to be equally resistant to fire and deterioration as required by this section. Ducts constructed of sheet metal must be in accordance with the following table:

Table 1 to Paragraph (a) (1)—Minimum Metal Thickness for Ducts ¹

Duct type	Diameter 14 in. or less	Width over 14 in.
Round	0.013	0.016
Enclosed rectangular	0.013	0.016
Exposed rectangular	0.016	0.019
1  When “nominal” thickness are specified, 0.003 in. shall be added to these “minimum” metal thicknesses.