I Joist Roof Span Table

Use this table to determine the maximum lengths of floor joists based on species of lumber joist spacing and joist size.

I joist roof span table.

Use this table to determine the maximum lengths of roof rafters based on species and grade of lumber spacing dimensions load and slope. High pitch 6 12 to 12 12 16 17 load bearing cantilever tables 18 21. Span calculator for wood joists and rafters also available for the android os. Straight line interpolation shall be permitted for intermediate spans and design values.

Engineered wood products ewp span and size charts for bci joists. For the bird s mouth roof joist bearing detail. Bci joists are specially constructed i joists with flanges made from strong versa lam laminated veneer lumber with oriented stranded board webs and approved waterproof structural adhesives providing outstanding strength and durability. These span tables assume installation of at least three joists or rafters that are spaced not more than 24 on center.

Web stiffeners shall be cut to fit between the flanges of the lp solidstart i joist leaving a minimum 1 8 gap 1 maximum. This performance standard provides an easy to use table of allowable spans for applications in residential floor construction allowing designers and builders to select and use i joists from various member manufacturers using just one set of span tables.