Wood Beam Span Table Roof

Span tables for jois ts and rafters american wood council 4 span tables for joists and rafters american wood council design criteria.

Wood beam span table roof.

Limited to span in inches divided by 360. Deflection for 30 psf live load. Use the span tables below to determine allowable lengths of joists and rafters based on size and standard design loads. Also available for the android os.

Tables 13 14. The tables below give maximum spans for rafters and beams. You can also use the wood beam calculator from the american wood council website to determine maximum rafter and joist lengths. Our floor joist span tables are based on loadings given in the newer amended version of bs 6399 1.

Raised wood floor foundations. The figures are based on quality materials. This means that some values are slightly more conservative than span tables from other sources if those do not include the amended guidance. Strength live load of 30 psf plus dead load of 10 psf determines the required bending design value.

Keep in mind that these are maximums in other words shortening spans slightly will result in a more solid structure. Span calculator for wood joists and rafters also available for the android os.