40 CFR Appendix Table 28 to Subpart G of Part 63 - Deck Seam Length Factors a (SD) for Internal Floating Roof Tanks
Table 28 to Subpart G of Part 63—Deck Seam Length Factors
a (SD) for Internal Floating Roof Tanks
| Deck construction | Typical deck seam length factor |
|---|---|
| Continuous sheet construction b: | |
| 5-feet wide sheets | 0.2 c |
| 6-feet wide sheets | 0.17 |
| 7-feet wide sheets | 0.14 |
| Panel construction d: | |
| 5 × 7.5 feet rectangular | 0.33 |
| 5 × 12 feet rectangular | 0.28 |
a Deck seam loss applies to bolted decks only. Units for S D are feet per square feet.
b SD = 1/W, where W = sheet width (feet).
c If no specific information is available, these factors can be assumed to represent the most common bolted decks currently in use.
d SD = (L + W)/LW, where W = panel width (feet), and L = panel length (feet).