Span Charts

Douglas Fir/Larch (DF/L)

Roof Beams - Construction Load

Roof Beams - Snow Load

Floor Beams - Floor Live Load

Alaskan Yellow Cedar

Roof Beams - Construction Load

Roof Beams - Snow Load

Floor Beams - Floor Live Load

Framing Grade/Size Spans Charts

"I-Joist Compatible" (IJC) Sizes (DF/L: 3-1/2 and 5-1/2 in. widths)

(Depths compatible with common manufactured lumber sizes)

Floor Beams (IJC) - Floor Live Load

Roof Beams (IJC) - Roof Snow Load

Roof Beams (IJC) - Roof Construction Load

Framing Grade Conventional Sizes (DF/L: 3-1/2, 5-1/2 and 6-3/4 in. widths)

Roof Beams - Construction Load

Roof Beams - Snow Load

Floor Beams - Floor Live Load

 Charts courtesy of the
American Institute of Timber Construction