Maximum Span For 2x8 Floor Joist
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These tables can also be used to determine deck joist span.
Maximum span for 2x8 floor joist. 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. A 2 2x10 can span 10 feet and so on. Hem fir 2 joists with a live dead load of 40 10 psf. 1 ft 0 3048 m.
The illustrations one for cantilever joists and one for flush rim beam hung joists point out where joist span measurements are taken from the saddle of the ledger mounted joist hanger to the center of a dropped beam or saddle of the. Live load is weight of furniture wind snow and more. Span calculator for wood joists and rafters also available for the android os. 1 psf lb f ft 2 47 88 n m 2.
Spans in this table were derived from the irc table r502 3 1 2 design criteria. Dimensional lumber deck beam span chart. A 2x8 up to 12 feet. Joist span and spacing is set by your local building code.
2x10 to 15 feet and 2x12 to 18 feet. In general terms joists spaced 16 inches on center can span 1 5 times in feet their depth in inches. Maximum floor joist span for no. 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.
Also available for the android os. For example in the joist span table below the highlighted cell shows that 2 x 8 southern yellow pine joists that have a grade of 2 and are spaced 24 apart can have a maximum span of 10 feet 3 inches 10 3 if designing for a live load of 40 lbs ft 2. The larger the deck the larger the joists. The numbers in gray indicate the distance between the support posts.
Dead load weight of structure and fixed loads 10 lbs ft 2. 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. A double 2x12 beam can span 12 feet.
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