While most residential construction uses 2x8 joists with 16 inch spacing there are many other factors you need to consider when determining the proper joist span length.
Manufactured joists in flooring.
Engineered wood products ewp span and size charts for bci joists.
When building a house or even a deck it is important to confirm you have the correct joist sizes spans and spacing before you get started.
L 360 is typically the building code minimum.
These manufactured floor joists can provide a solid floor if you go with a l 480 deflection criteria.
This sample table gives minimum floor joist sizes for joists spaced at 16 inches and 24 inches on center o c for 2 grade lumber with 10 pounds per square foot of dead load and 40 pounds of live load which is typical of normal residential construction.
We offer roof trusses storage building trusses and frames floor trusses and trusses that are immediately available to pick up at one of our conveniently located plants.
I joists provide a high performance alternative to dimension lumber joists for floor and roof applications.
Thanks to its osb panel which can be adjusted over 24 as required the open joist triforce also helps keep inventory simple and efficient.
The open joist triforce is offered in industry standard measurements of 11 7 8 14 and 16 inches 241 mm 302 mm 356 mm and 406 mm.
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.
The l indicates the span and as the bottom number gets bigger the deflection goes down.
Shop menards for a wide selection of i joists that are lightweight strong stable and can be used as floor joists.
Some of those options include laminated veneer and strand lumbers i joist and rim boards.
Joist span and spacing is set by your local building code.
In addition we carry a wide selection of lumber and boards.
True floor joist span calculations can only be made by a structural engineer or contractor.