Code of Federal Regulations (Last Updated: November 8, 2024) |
Title 40 - Protection of Environment |
Chapter I - Environmental Protection Agency |
SubChapter C - Air Programs |
Part 63 - National Emission Standards for Hazardous Air Pollutants for Source Categories |
Table 32 to Subpart G of Part 63 - Typical Number of Roof Legs, a NF8
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Table 32 to Subpart G of Part 63 - Typical Number of Roof Legs,a NF8
Tank diameter D (feet)b Pontoon roof No. of legs on double-deck roof No. of pontoon legs No. of center legs 30 4 2 6 40 4 4 7 50 6 6 8 60 9 7 10 70 13 9 13 80 15 10 16 90 16 12 20 100 17 16 25 110 18 20 29 120 19 24 34 130 20 28 40 140 21 33 46 150 23 38 52 160 26 42 58 170 27 49 66 180 28 56 74 190 29 62 82 200 30 69 90 210 31 77 98 220 32 83 107 230 33 92 115 240 34 101 127 250 34 109 138 260 36 118 149 270 36 128 162 280 37 138 173 290 38 148 186 300 38 156 200 310 39 168 213 320 39 179 226 330 40 190 240 340 41 202 255 350 42 213 270 360 44 226 285 370 45 238 300 380 46 252 315 390 47 266 330 400 48 281 345