I Beam Floor Joist Span Table

Our floor joist span tables are based on loadings given in the newer amended version of bs 6399 1.

I beam floor joist span table.

Use the span tables below to determine allowable lengths of joists and rafters based on size and standard design loads. Trus joist tji joists are a key part of making a high performance floor. Tji joists are lightweight and come in long lengths which makes them faster and easier to install than traditional framing and saves you both. Joists design properties 6 floor span and load tables 7 8 tips for preventing floor noise 8 allowable holes 9 cantilevers 10 11 roof span and load tables 12 13 framing connectors 14 15 section 2.

Our floor joist beam can span a maximum of 13. In the table above the widest floor beam span for 12 of supported floor joists is 14 7 if using a 5 ply 2 x 12. They are ideal for long spans including continuous spans over intermediate supports. 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.

Low pitch 6 12 or less 14 15 roof span tables. High pitch 6 12 to 12 12 16 17 load bearing cantilever tables 18 21. Engineered wood products ewp span and size charts for bci joists. Design properties 16 floor span and load tables 17 allowable holes 18 roof span and load tables 19 cantilevers 20 21.

This means that some values are slightly more conservative than span tables from other sources if those do not include the amended guidance. Because i joists are straight and true it s easier for builders to avoid crowning and maintain a level framing surface. 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. Wood i beam floor joist 20 ll 10 dl 40 ll 10 dl 20 ll 10 dl extend floor sheathing to outside face of wall blocking or fiberstrong rim board required at bearing for lateral support rafter page8georgia pacific wood productsapr 2015engineered lumber residential guide roof joist maximum spans table continues on next page.

You can also use the wood beam calculator from the american wood council website to determine maximum rafter and joist lengths. Span tables for domestic floor joists to bs 5268 7 1 note. These tables can also be used to determine deck joist span. The dimensional stability of tji joists help them resist warping twisting and shrinking that can lead to squeaky floors.

Let s say our house is 24 x 26.