2x8 Floor Joist Span Table
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Maximum floor joist span for no.
2x8 floor joist span table. 1 ft 0 3048 m. 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. 2 or better treated for weather and or ground exposure. But you ll notice when you look at the portion of the span table for joists with cantilevers that the joist span for decks with a cantilever is often less than the span for the same sized joist without cantilevers.
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. 1 psf lb f ft 2 47 88 n m 2. 12 2 2005 8 27 08 am. Joist span and spacing is set by your local building code.
This table is based on the use of ponderosa pine no. 2 grade of douglas fir are indicated below. Section r507 5 notes that deck joists can cantilever up to 1 4 of the joist span. You should check with your local building department for construction requirements in your area.
Listed are 46 tables based on common loading conditions for floor joists ceiling joists and rafters. View joist rafter tables. Also available for the android os. Dead load weight of structure and fixed loads 10 lbs ft 2.
Span calculator for wood joists and rafters also available for the android os. Steel post cap connectors plywood post to beam cleats other connectors deck porch railings code requirements safety deck framing tables codes specifications questions answers about allowable spans for deck floor or porch framing. Hem fir 2 joists with a live dead load of 40 10 psf. Microsoft word deck span table doc author.
Simplified maximum span tables for selected visual and mechanical grades of southern pine lumber in sizes 2 4 thru 2 12. Spans in this table were derived from the irc table r502 3 1 2 design criteria.
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