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