40 CFR Part 63, Table 25 — Effective Column Diameter (Fc)
Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
| Column type | Fc (feet) |
|---|---|
| 9-inch by 7-inch built-up columns | 1.1 |
| 8-inch-diameter pipe columns | 0.7 |
| No construction details known | 1 |