Table 24 to Subpart G of Part 63—Typical Number of Columns as a Function of Tank Diameter for Internal Floating Roof Tanks With Column Supported Fixed Roofs a

Tank diameter range (D in feet)	Typical number of columns, (NC)	0 <D ≤85	1	85 <D ≤100	6	100 <D ≤120	7	120 <D ≤135	8	135 <D ≤150	9	150 <D ≤170	16	170 <D ≤190	19	190 <D ≤220	22	220 <D ≤235	31	235 <D ≤270	37	270 <D ≤275	43	275 <D ≤290	49	290 <D ≤330	61	330 <D ≤360	71	360 <D ≤400	81

a Data in this table should not supersede information on actual tanks.