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 Code of Federal Regulations (Last Updated: November 8, 2024)
 Title 14 - Aeronautics and Space
 Chapter III - Commercial Space Transportation, Federal Aviation Administration, Department of Transportation
 SubChapter C - Licensing
 Part 420 - License to Operate a Launch Site

  Appendix E to Part 420 - Tables for Explosive Site Plan

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  • Appendix E to Part 420 - Tables for Explosive Site Plan

    Table E-1 - Division 1.1 Distances to a Public Area or Public Traffic Route for NEW ≤450 lbs

    NEW
    (lbs.)     		Distance to public area
    (ft)1 2     		Distance to public traffic route distance
    (ft)2
    ≤0.5 236 142
    0.7 263 158
    1 291 175
    2 346 208
    3 378 227
    5 419 251
    7 445 267
    10 474 284
    15 506 304
    20 529 317
    30 561 337
    31 563 338
    50 601 361
    70 628 377
    100 658 395
    150 815 489
    200 927 556
    300 1085 651
    450 1243 746

    1 To calculate distance d to a public area from NEW:

    NEW ≤0.5 lbs: d = 236

    0.5 lbs <NEW <100 lbs: d = 291.3 + [79.2 *ln(NEW)]

    100 lbs ≤NEW ≤450 lbs: d = −1133.9 + [389 *ln(NEW)]

    NEW is in lbs; d is in ft; ln is natural logarithm.

    To calculate maximum NEW given distance d (noting that d can never be less than 236 ft):

    0 ≤d <236 ft: Not allowed (d cannot be less than 236 ft)

    236 ft ≤d <658 ft: NEW = exp [(d/79.2)-3.678]

    658 ft ≤d <1250 ft: NEW = exp [(d/389) + 2.914]

    NEW is in lbs; d is in ft; exp[x] is ex.

    2 The public traffic route distance is 60 percent of the distance to a public area.

    Table E-2 - Division 1.1 Distance to Public Area and Public Traffic Route for NEW >450 lbs

    NEW (lbs) Distance to public area
    (ft)1     		Distance to public traffic route
    (ft)
    450 lbs<NEW ≤30,000 lbs 1,250 750.
    30,000 lbs<NEW ≤100,000 lbs 40*NEW1/3 0.60*(Distance to Public Area).
    100,000 lbs<NEW ≤250,000 lbs 2.42*NEW0.577 0.60*(Distance to Public Area).
    250,000 lbs<NEW 50*NEW1/3 0.60*(Distance to Public Area).

    1 To calculate NEW from distance d to a public area:

    1, 243 ft<d ≤1,857 ft: NEW = d3/64,000

    1, 857 ft<d ≤3,150 ft: NEW = 0.2162 * d1.7331

    3,150 ft<d: NEW = d3/125,000

    NEW is in lbs; d is in ft.

    Table E-3 - Division 1.1 Intraline Distances1 2 3

    NEW
    (lbs)     		Intraline
    Distance
    (ft)
    50 66
    70 74
    100 84
    150 96
    200 105
    300 120
    500 143
    700 160
    1,000 180
    1,500 206
    2,000 227
    3,000 260
    5,000 308
    7,000 344
    10,000 388
    15,000 444
    20,000 489
    30,000 559
    50,000 663
    70,000 742
    100,000 835
    150,000 956
    200,000 1,053
    300,000 1,205
    500,0003 1,429
    700,000 1,598
    1,000,000 1,800
    1,500,000 2,060
    2,000,000 2,268
    3,000,000 2,596
    5,000,000 3,078

    1 To calculate intraline distance d from NEW:

    d = 18*NEW1/3

    NEW is in pounds; d is in feet

    2 To calculate maximum NEW from given intraline distance d:

    NEW = d3/5,832

    NEW is in pounds; d is in feet.

    3 NEW values of more than 500,000 lbs only apply to liquid propellants with TNT equivalents equal to those NEW values. The intraline distances for NEW greater than 500,000 pounds do not apply to division 1.1 explosives.

    Table E-4 - Division 1.3 Separation Distances

    NEW (lbs) Distance to public area or public traffic route (ft)1 Intraline
    distance (ft)2
    ≤1000 75 50
    1,500 82 56
    2,000 89 61
    3,000 101 68
    5,000 117 80
    7,000 130 88
    10,000 145 98
    15,000 164 112
    20,000 180 122
    30,000 204 138
    50,000 240 163
    70,000 268 181
    100,000 300 204
    150,000 346 234
    200,000 385 260
    300,000 454 303
    500,000 569 372
    700,000 668 428
    1,000,000 800 500
    1,500,000 936 577
    2,000,000 1,008 630

    1 To calculate distance d to a public area or traffic route from NEW:

    NEW ≤1,000lbs

    d= 75 ft

    1,000 lbs<NEW ≤96,000 lbs

    d = exp[2.47 + 0.2368*(ln(NEW)) + 0.00384*(ln(NEW))2]

    96,000 lbs<NEW ≤1,000,000 lbs

    d = exp[7.2297−0.5984*(ln(NEW)) + 0.04046*(ln(NEW))2]

    NEW >1,000,000 lbs

    d = 8*NEW1/3

    NEW is in pounds; d is in feet; exp[x] is ex; ln is natural logarithm.

    To calculate NEW from distance d to a public area or traffic route (noting that d cannot be less than 75 ft):

    0 ≤d <75 ft:

    Not allowed (d cannot be less than 75 ft) for NEW ≤1000 lbs

    75 ft ≤d≤296 ft

    NEW = exp[−30.833 + (307.465 + 260.417*(ln(d)))1/2]

    296 ft<d≤800 ft

    NEW = exp[7.395 + (−124.002 + 24.716*(ln(d)))1/2]

    800 ft<d

    NEW = d3/512

    NEW is in lbs; d is in ft; exp[x] is ex; ln is natural logarithm

    2 To calculate intraline distance d from NEW:

    NEW ≤1,000 lbs

    d = 50 ft

    1,000 lbs<NEW ≤84,000 lbs

    d = exp[2.0325 + 0.2488*(ln(NEW)) + 0.00313* (ln(NEW))2]

    84,000 lbs<NEW ≤1,000,000 lbs

    d= exp[4.338−0.1695*(ln(NEW)) + 0.0221*(ln(NEW))2]

    1,000,000 lbs<NEW

    d = 5*NEW1/3

    NEW is in pounds; d is in feet; exp[x] is ex; ln is natural logarithm

    To calculate NEW from an intraline distance d:

    0 ≤d <50 ft:

    Not allowed (d cannot be less than 50 ft) for NEW ≤1000 lbs

    50 ft ≤d≤192 ft

    NEW = exp[−39.744 + (930.257 + 319.49*(ln(d)))1/2]

    192 ft<d≤500 ft

    NEW = exp[3.834 + (−181.58 + 45.249*(ln(d)))1/2]

    500 ft≤d

    NEW = d3/125

    NEW is in pounds; d is in feet; exp[x] is ex; ln is natural logarithm

    Table E-5 - Energetic Liquid Explosive Equivalents1 2 3

    Energetic liquids TNT Equivalence TNT Equivalence
    Static Test Stands Launch Pads.
    LO2/LH2 See Note 3 See Note 3.
    LO2/LH2 + LO2/RP-1 Sum of (see Note 3 for LO2/LH2) + (10% for LO2/RP1) Sum of (see Note 3 for LO2/LH2) + (20% for LO2/RP1).
    LO2/RP-1 10% 20% up to 500,000 lbs
    Plus 10% over 500,000 lbs
    IRFNA/UDMH 10% 10%.
    N204/UDMH + N2H4 5% 10%.

    1 A launch site operator must use the percentage factors of table E-5 to determine TNT equivalencies of incompatible energetic liquids that are within an intraline distance of each other.

    2 A launch site operator may substitute the following energetic liquids to determine TNT equivalency under this table as follows:

    Alcohols or other hydrocarbon for RP-1

    H2O2 for LO2 (only when H2O2 is in combination with RP-1 or equivalent hydrocarbon fuel)

    MMH for N2H4, UDMH, or combinations of the two.

    3 TNT equivalency for LO2/LH2 is the larger of:

    (a) TNT equivalency of 8*W2/3, where W is the weight of LO2/LH2 in lbs; or

    (b) 14 percent of the LO2/LH2 weight.

    Table E-6 - Factors To Use When Converting Energetic Liquid Densities

    Item Density
    (lb/gal)     		Temperature
    ( °F)
    Ethyl alcohol 6.6 68
    Hydrazine 8.4 68
    Hydrogen peroxide (90 percent) 11.6 68
    Liquid hydrogen 0.59 −423
    Liquid oxygen 9.5 −297
    Red fuming nitric acid (IRFNA) 12.9 77
    RP-1 6.8 68
    UDMH 6.6 68
    UDMH/Hydrazine 7.5 68

    Table E-7 - Separation Distance Criteria for Storage of Hydrogen Peroxide in Concentrations of More than 91 Percent1 2

    Quantity
    (lbs)     		Intraline distance or distance to public area or distance to public traffic route
    (ft)
    10,000 510
    15,000 592
    20,000 651
    30,000 746
    50,000 884
    70,000 989
    100,000 1114
    150,000 1275
    200,000 1404
    300,000 1607
    500,000 1905

    1 Multiple tanks containing hydrogen peroxide in concentrations of greater than 91 percent may be located at distances less than those required by table E-7; however, if the tanks are not separated from each other by 10 percent of the distance specified for the largest tank, then the launch site operator must use the total contents of all tanks to calculate each intraline distance and the distance to each public area and each public traffic route.

    2 A launch site operator may use the equations below to determine permissible distance or quantity between the entries of table E-7:

    W >10,000 lbs Distance = 24 * W1/3

    Where Distance is in ft and W is in lbs.

    To calculate weight of hydrogen peroxide from a distance d:

    d >75 ft

    W = exp[−134.286 + 71.998*(ln(d)) −12.363*(ln(d))2 + 0.7229*(ln(d))3]

    Table E-8 - Separation Distance Criteria for Storage of Liquid Hydrogen and Bulk Quantities of Hydrazine

    Pounds of energetic liquid Pounds of energetic liquid Public area and intraline distance to incompatible energetic liquids Intraline distance to compatible energetic liquids Pounds of energetic liquid Pounds of energetic liquid Public area and intraline distance to incompatible energetic liquids Intraline distance to compatible energetic liquids
    Over Not Over Distance in feet Distance in feet Over Not Over Distance in feet Distance in feet
    60,000 70,000 1,200 130
    100 200 600 35 70,000 80,000 1,200 130
    200 300 600 40 80,000 90,000 1,200 135
    300 400 600 45 90,000 100,000 1,200 135
    400 500 600 50 100,000 125,000 1,800 140
    500 600 600 50 125,000 150,000 1,800 145
    600 700 600 55 150,000 175,000 1,800 150
    700 800 600 55 175,000 200,000 1,800 155
    800 900 600 60 200,000 250,000 1,800 160
    900 1,000 600 60 250,000 300,000 1,800 165
    1,000 2,000 600 65 300,000 350,000 1,800 170
    2,000 3,000 600 70 350,000 400,000 1,800 175
    3,000 4,000 600 75 400,000 450,000 1,800 180
    4,000 5,000 600 80 450,000 500,000 1,800 180
    5,000 6,000 600 80 500,000 600,000 1,800 185
    6,000 7,000 600 85 600,000 700,000 1,800 190
    7,000 8,000 600 85 700,000 800,000 1,800 195
    8,000 9,000 600 90 800,000 900,000 1,800 200
    9,000 10,000 600 90 900,000 1,000,000 1,800 205
    10,000 15,000 1,200 95 1,000,000 2,000,000 1,800 235
    15,000 20,000 1,200 100 2,000,000 3,000,000 1,800 255
    20,000 25,000 1,200 105 3,000,000 4,000,000 1,800 265
    25,000 30,000 1,200 110 4,000,000 5,000,000 1,800 275
    30,000 35,000 1,200 110 5,000,000 6,000,000 1,800 285
    35,000 40,000 1,200 115 6,000,000 7,000,000 1,800 295
    40,000 45,000 1,200 120 7,000,000 8,000,000 1,800 300
    45,000 50,000 1,200 120 8,000,000 9,000,000 1,800 305
    50,000 60,000 1,200 125 9,000,000 10,000,000 1,800 310

    [Doc. No. FAA-2011-0105, 77 FR 55116, Sept. 7, 2012]