Wood I Beam Span Table

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

Wood i beam span table.

Floor joist maximum spans joist joist spacing simple span spacing multiple span series depth 12 9 o c 16 19 2 2412 91 29 178 019 158 079 148 099 138 109 188 079 178 009. This span table excerpt shows two possible sizes of built up floor beams 2 x 10 and 2 x 12. Wood i beam blocking panels may be used in place of the 2x4. Sample floor beam span table.

For loading other than that shown above refer to uniform load tables use fastbeam. It also shows the maximum that the beam can span. You can also use the wood beam calculator from the american wood council website to determine maximum rafter and joist lengths. This table is simply a sample and may not be valid for your region.

Live load deflection is limited to l 480 for better performance. Floor performance is greatly influenced by the stiffness of the floor joists. The full table shows more lumber sizes. Experience has shown that joists designed to the code.

There are several beam span tables for all the species of wood. Wood i beam joists gpi series lvl flanges wi series lumber flanges. Engineered wood products ewp span and size charts for bci joists.