2x8 Floor Joist Span
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Ex an 8 span should have a 2x8 joist.
2x8 floor joist span. Span calculator for wood joists and rafters also available for the android os. The same rule of thumb applies to door and window headers but you should use 4x wood. Dead load weight of structure and fixed loads 10 lbs ft 2.
Joist span and spacing is set by your local building code. 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. 1 ft 0 3048 m.
In general terms joists spaced 16 inches on center can span 1 5 times in feet their depth in inches. You should check with your local building department for construction requirements in your area. Live load is weight of furniture wind snow and more.
The rule of thumb is 1 of depth for each foot of run. True floor joist span calculations can only be made by a structural engineer or contractor. Maximum floor joist span for no.
Also available for the android os. Span entries are listed for 2 6 through 2 12 joists and 12 in 16 in and 24 in. 2 grade of douglas fir are indicated below.
The larger the deck the larger the joists. 2x10 to 15 feet and 2x12 to 18 feet. 1 psf lb f ft 2 47 88 n m 2.
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