Engineered Floor Joists Span Table

Reading the table you ll see that 2 x 8s installed 16 apart on center can span 12 4.

Engineered floor joists span table.

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. Engineered wood products ewp span and size charts for bci joists. The apa mark of quality. Span refers to the length of the i joist.

Lp solidstart i joists are a building material with built in environmental benefits made of engineered wood substrate a renewable resource with a reduced environmental impact raw material procurement targets small fast growing trees in lp s manufacturing process no part of the log goes. 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. These tables can also be used to determine deck joist span. Spans in floors ceilings and roofs.

So our house would look like the picture below with all floor joists 2 x 8. The l 480 table with a 40 per square foot live load and a 20 per square foot dead load with a depth of 11 7 8 inches will give you spans according to joint weight. With these factors the lightest joist will have a maximum span of 17 feet 8 inches. This is the most common as the typical span is 15 feet.