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.
Floor joist span 40 feet.
Dead load weight of structure and fixed loads 10 lbs ft 2.
1 psf lb f ft 2 47 88 n m 2.
Dead load is the weight of the structure and any fixed items.
Live load is weight of furniture wind snow and more.
Oncenter bli 40 wood i joist 14 in x 2 5 in x 16 ft.
Floor trusses 5.
Span calculator for wood joists and rafters also available for the android os.
Engineered wood products ewp span and size charts for bci joists.
Skip to main content.
True floor joist span calculations can only be made by a structural engineer or contractor.
When making a selection below to narrow your results down each selection made will reload the page to display the desired results.
Our joist span charts are for wood joists with a maximum dead load of 10 pounds per square foot and a live load of 40 pounds per square foot.
Trusses i joists engineered lumber.
Maximum floor joist span for no.
Shop menards for a wide selection of i joists that are lightweight strong stable and can be used as floor joists.
This chart is for basic reference only.
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.
8 foot 4 10 foot 4 12 foot 4 14 foot 4.
Find a store near me.
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.
2 grade of douglas fir are indicated below.
1 ft 0 3048 m.
Live load represents the weight of furniture snow etc.
Find i joist joists at lowe s today.
2 spf 2x10s will do for your floor joists.
If you have any questions.
Oncenter bli 60 wood i joist 16 in x.
For pricing and availability.