Wooden I Beam Span Table

When used as part of a flooring system wood i beam joists can help floors stay quiet over time reducing bothersome and costly callbacks.

Wooden i beam span table.

Floor performance is greatly influenced by the stiffness of the floor joists. These nine beam spans are for built up beams made up of either 2x8 2x10 or 2x12 dimensional lumber nailed together as either 3 4 or 5 ply beams. The values displayed in the resulting table will show nine possible maximum beam spans for the supported length selected. For example a 3 ply 2x8 beam would use three 2x8s nailed together side by side.

Conventional lumber can shrink twist and warp as the moisture found naturally in the wood evaporates. 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. Headers beams. Anything 5 and above we always at least double cripple.

Wood i beam blocking panels may be used in place of the 2x4. 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. 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.

Live load deflection is limited to l 480 for better performance. 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. Experience has shown that joists designed to the. Joist and rafter span tables.

I joists are comprised of top and bottom flanges which resist bending united with webs which provide outstanding shear resistance. You can also use the wood beam calculator from the american wood council website to determine maximum rafter and joist lengths. I joist basics i joists are strong lightweight i shaped engineered wood structural members that meet demanding performance standards. 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.

Size selection tables headers beams.