Design Specifications:
Dead Load = 10 psf, Live Load = 40 psf (Residential)
Douglas Fir - Larch Framing
Deflection of L/360 maximum.
| 4'-0" Spacing | 6'-0" Spacing | |||
| Size of Girders (inches) | No.2 Doug. Fir | No.1 Doug. Fir | No.2 Doug. Fir | No.1 Doug. Fir |
| 4 x 4 | 5'-2" | 5'-3" | 4'-6" | 4'-6" |
| 4 x 6 | 8'-0" | 8'-3" | 6'-6" | 7'-3" |
| 4 x 8 | 10'-9" | 11'-0" | 8'-9" | 9'-3" |
| 6 x 6 | 9'-9" | 8'-6" | ||
| 6 x 8 | 13'-3" | 11'-6" | ||