Rafter Span Floor Joist Span Table

Strength live load of 30 psf plus dead load of 10 psf determines the required bending design value.

Rafter span floor joist span table.

For each application a pdf download is available. Ceiling joist span use this table to determine the maximum lengths of ceiling joists based on species of lumber joist spacing and joist size. This means that some values are slightly more conservative than span tables from other sources if those do not include the amended guidance. These 46 tables are based upon design values for visually graded southern pine dimension lumber that became effective june 1 2013.

Span calculator for wood joists and rafters also available for the android os. Limited to span in inches divided by 360. Deflection for 30 psf live load. Also available for the android os.

Tables listing maximum spans for southern pine joists and rafters are detailed below. Span tables for domestic floor joists to bs 5268 7 1 note. Rafter spans can be extended slightly beyond what the rafter tables suggest when there is a cantelever extending beyond the supporting wall. Our floor joist span tables are based on loadings given in the newer amended version of bs 6399 1.