TABLE OF CONTENTS Loads given in Appendix B are typical values. Specific products may have weights which differ considerably from those shown, and manufacturer s catalogs should be consulted for actual loads.
| Roof dead loads | ||||
|---|---|---|---|---|
| Material | Weight, psf | |||
| Lumber sheathing, 1 in. nominal | 2.5 | |||
| Plywood, per inch of thickness | 3.0 | |||
| Timber decking (MC = 15%): | 2 in. nom. | 3 in. nom. | 4 in. nom. | |
| DF-Larch | 4.2 | 7.0 | 9.8 | |
| DF (South) | 3.9 | 6.5 | 9.1 | |
| Hem-Fir | 3.7 | 6.1 | 8.5 | |
| Spruce-Pine-Fir | 3.7 | 6.1 | 8.5 | |
| Western Woods | 3.5 | 5.8 | 8.1 | |
| Western Cedars | 3.5 | 5.8 | 8.1 |
| Roof dead loads | |||
|---|---|---|---|
| Material | Weight, psf | ||
| Aluminum (including laps): | Flat | Corrugated (1 1/2 and 2 1/2 in.) | |
| 12 American or B&S gage | 1.2 |
| |
| 14 | 0.9 | 1.1 | |
| 16 | 0.7 | 0.9 | |
| 18 | 0.6 | 0.7 | |
| 20 | 0.5 | 0.6 | |
| 22 |
| 0.4 | |
| Galvanized steel (including laps): | Flat | Corrugated (2 1/2 and 3 in.) | |
| 12 U.S. std. gage | 4.5 | 4.9 | |
| 14 | 3.3 | 3.6 | |
| 16 | 2.7 | 2.9 | |
| 18 | 2.2 | 2.4 | |
| 20 | 1.7 | 1.8 | |
| 22 | 1.4 | 1.5 | |
| 24 | 1.2 | 1.3 | |
| 26 | 0.9 | 1.0 | |
| Other types of decking (per inch of thickness): | |||
| Concrete plank | 6.5 | ||
| Insulrock | 2.7 | ||
| Petrical | 2.7 | ||
| Porex | 2.7 | ||
| Poured gypsum | 6.5 | ||
| Tectum | 2.0 | ||
| Vermiculite concrete | 2.6 | ||
| Corrugated asbestos (1/4 in.) | 3.0 | ||
| Felt: | |||
| 3-ply | 1.5 | ||
| 3-ply with gravel | 5.5 | ||
| 5-ply | 2.5 | ||
| 5-ply... |
