Floor I Beam Span Chart

Use the span tables below to determine allowable lengths of joists and rafters based on size and standard design loads.

Floor i beam span chart. You can also use the wood beam calculator from the american wood council website to determine maximum rafter and joist lengths. Sample floor beam span table. A double 2x12 beam can span 12 feet. 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.

This table is simply a sample and may not be valid for your region. A 2 2x10 can span 10 feet and so on. When supporting joists that span 12 feet with no overhang beyond the beam a double ply beam can span in feet a value equal to its depth in inches. Beams of more than one ply must be fastened together with either nails or bolts.

Joist span table use these tables to determine floor joist spans based on grade of lumber size of joist floor joist spacing and a live load of 30 lbs ft 2 or 40 lbs ft 2 these tables can also be used to determine deck joist span. Download a pdf tables 13 14. One third stiffer than required by code 2 spans are clear distances between supports and are based on composite action with. Engineered wood products ewp span and size charts for bci joists.

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. Engineered wood products ewp lvl span and size charts. For example a 308 span with up to 19 of allow able live load deflection could be adjacent to an end wall with no deflection causing a noticeable difference in floor levels under full design load. Versa lam laminated veneer lumber lvl beams and headers eliminate twisting shrinking and splitting and deliver flatter quieter floors and structures.

Anything 5 and above we always at least double cripple. A stiffer floor will result from using a live load deflection limit. Floor spans for wood i beam joists in accordance with those given above are strongly recommended which are based on l 480 live load deflection. On longer spans the beam may require much more bearing space as indicated by this table.

Table number grade live or ground snow load psf. Floor joist span tables for various sizes and species of wood. Our versa lam lvl is manufactured in either alexandria lena louisiana in eastern united states or in white city oregon for the western united states. This span table excerpt shows two possible sizes.

Dimensional lumber deck beam span chart. There are several beam span tables for all the species of wood. Joist with a long span parallels a short span or a foundation end wall.