Table 32 to Subpart G of Part 63—Typical Number of Roof Legs, a NF8

Regulations
title 40
chapter I-i10
part 63
subpart G
appendix-i 32

- 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

a This table should not supersede information based on actual tank data.

b 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.