2x8 Floor Joist Span Chart
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Span entries are listed for 2 6 through 2 12 joists and 12 in 16 in and 24 in.
2x8 floor joist span chart. Hem fir 2 joists with a live dead load of 40 10 psf. 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. 2x10 to 15 feet and 2x12 to 18 feet. A 2 2x10 can span 10 feet and so on.
A 2x8 up to 12 feet. 2 grade of douglas fir are indicated below. Span calculator for wood joists and rafters also available for the android os. Spans in this table were derived from the irc table r502 3 1 2 design criteria.
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. Live load is weight of furniture wind snow and more. The larger the deck the larger the joists. 1 psf lb f ft 2 47 88 n m 2.
When supporting joists that span 12 feet with no overhang beyond the beam a double ply beam can span in feet a value equal to its depth in inches. Maximum floor joist span for no. View joist rafter tables. Also available for the android os.
Floor joist span tables for various sizes and species of wood. While every effort has been made to insure the accuracy of the information presented and special effort has been made to assure that the information reflects the state of the art neither the west coast lumber inspection bureau the american wood council nor its members assume any responsibility for any particular design prepared from this online span calculator. Dead load weight of structure and fixed loads 10 lbs ft 2. A double 2x12 beam can span 12 feet.
Dimensional lumber deck beam span chart. 1 ft 0 3048 m. In typical deck construction with a ledger on one side of the joist and beam on the other the size of the joists is driven by the size of the deck and based on the general maximum spans mentioned above. Joist span and spacing is set by your local building code.
Listed are 46 tables based on common loading conditions for floor joists ceiling joists and rafters. 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.
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