40 CFR Table 28 to Subpart G of Part 63
Deck Seam Length Factors (SD) for Internal Floating Roof Tanks
June 9, 2020
Open Table
| Deck construction | Typical deck seam length factor |
|---|---|
| Continuous sheet constructionb: | |
| 5-feet wide sheets | 0.2c |
| 6-feet wide sheets | 0.17 |
| 7-feet wide sheets | 0.14 |
| Panel constructiond: | |
| 5 × 7.5 feet rectangular | 0.33 |
| 5 × 12 feet rectangular | 0.28 |
aDeck seam loss applies to bolted decks only. Units for SD are feet per square feet.
b SD = 1/W, where W = sheet width (feet).
cIf 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).
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