Wooden I Beam Span Table

Allowable load tables tables providing size selections for various beam spans and loading combinations for southern pine dimension lumber and southern pine glued laminated timber are available for the following applications.

Wooden i beam span table.

I joists are comprised of top and bottom flanges which resist bending united with webs which provide outstanding shear resistance. Size selection tables headers beams. Experience has shown that joists designed to the. When used as part of a flooring system wood i beam joists can help floors stay quiet over time reducing bothersome and costly callbacks.

Joist and rafter span tables. Wood i beam blocking panels may be used in place of the 2x4. Floor performance is greatly influenced by the stiffness of the floor joists. Engineered wood products ewp span and size charts for bci joists.

On longer spans the beam may require much more bearing space as indicated by this table. I joist basics i joists are strong lightweight i shaped engineered wood structural members that meet demanding performance standards. For example a 3 ply 2x8 beam would use three 2x8s nailed together side by side. A 2x12 with an e of 800 000 psi and fb of 790 psi also works since it can span 15 feet and 10 inches.

Conventional lumber can shrink twist and warp as the moisture found naturally in the wood evaporates. The values displayed in the resulting table will show nine possible maximum beam spans for the supported length selected. Live load deflection is limited to l 480 for better performance. These span tables are based on uniform loads as noted above.

Headers beams. Anything 5 and above we always at least double cripple. As the table shows no 2x8 s meet the span and spacing requirements but a 2x10 with an e of 1 300 000 psi and fb of 1093 psi can span 15 feet 3 inches more than enough. According to the 2012 irc codes any beam joist or header shall never have a bearing of less than 1 1 2.

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.