Floor Joist Span Table
To increase the use of wood by assuring the broad regulatory acceptance of wood products developing design tools and guidelines for wood construction and influencing the development of public policies affecting the use and manufacture of wood products. Floor joist span tables for various sizes and species of wood.
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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 lbsft 2 or 40 lbsft 2.
Floor joist span table. The table excerpt above is simply a sample and may not be valid for your region. Permitted for intermediate spans and design values. Listed are 46 tables based on common loading conditions for floor joists ceiling joists and rafters.
Dead load weight of structure and fixed loads 10 lbsft2. Joists rafters simplified maximum span tables for selected visual and mechanical grades of southern pine lumber in sizes 24 thru 212. These tables can also be used to determine deck joist span.
1 psf lbfft2 4788 nm2. 2 lumber grade all joists are bridged sample floor joist span table. These 46 tables are based upon design values for visually graded southern pine dimension lumber that became effective june 1 2013.
Maximum floor joist span for no. Lumber design values use of these span tables requires reference to the applicable design values for the various species and grades of lumber. Douglas fir larch lumber species no.
2 grade of douglas fir are indicated below. Tables w 1 and w 2 of design values for joists and rafters a supplement to these span tables provide such values for the most commonly used framing sizes. Tables listing maximum spans for southern pine joists and rafters are detailed below.
The table below shows the maximum span for a floor joist with the following designations. Live load is weight of furniture wind snow and more. For each application a pdf download is available.
Maximum floor joist span.
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