{"data":{"id":"us/40-cfr-table-32-to-subpart-g-of-part-63","jurisdiction":"us","citation":"40 CFR Table 32 to Subpart G of Part 63","heading":"Table 32 to Subpart G of Part 63—Typical Number of Roof Legs, a NF8","body":"Tank diameter D (feet) b Pontoon roof No. of legs on double-deck roof\nNo. of pontoon legs No. of center legs\n30 4 2 6\n40 4 4 7\n50 6 6 8\n60 9 7 10\n70 13 9 13\n80 15 10 16\n90 16 12 20\n100 17 16 25\n110 18 20 29\n120 19 24 34\n130 20 28 40\n140 21 33 46\n150 23 38 52\n160 26 42 58\n170 27 49 66\n180 28 56 74\n190 29 62 82\n200 30 69 90\n210 31 77 98\n220 32 83 107\n230 33 92 115\n240 34 101 127\n250 34 109 138\n260 36 118 149\n270 36 128 162\n280 37 138 173\n290 38 148 186\n300 38 156 200\n310 39 168 213\n320 39 179 226\n330 40 190 240\n340 41 202 255\n350 42 213 270\n360 44 226 285\n370 45 238 300\n380 46 252 315\n390 47 266 330\n400 48 281 345\na This table should not supersede information based on actual tank data.\nb If the actual diameter is between the diameters listed, the closest diameter listed should be used. If the actual diameter is midway between the diameters listed, the next larger diameter should be used.","path":["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","Subpart G—National Emission Standards for Hazardous Air Pollutants From the Synthetic Organic Chemical Manufacturing Industry for Process Vents, Storage Vessels, Transfer Operations, and Wastewater"],"source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-08-25/title-40.xml","current_through":"2026-08-25","vintage":"","retrieved_at":"2026-08-27T02:26:04Z","sha256":"da0d456a31a2730c8d3807103d2507ad3fcfddd21b053fb75763f507d099e13c","source_id":"us-cfr","stale":true,"prev":"us/40-cfr-table-31-to-subpart-g-of-part-63","next":"us/40-cfr-table-33-to-subpart-g-of-part-63"},"notice":"GroundRules: Original legal text. Not legal advice."}