Wood Span Tables

American wood council offers a range of span tables. Enter values for span ft spacing species grade live and dead load psf duration of load and wet service conditions allowable deflection criteria e g span 360 for live load only and select dimensions and properties from either the 2005 or 2012 national design specification nds. Simplified maximum span tables for selected visual and mechanical grades of southern pine lumber in sizes 2 4 thru 2 12.

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Allowable load tables tables providing size selections for various beam spans and loading combinations for southern pine dimension lumber and southern pine glued laminated timber are available for the following applications.

Wood span tables. Span calculator for wood joists and rafters also available for the android os. Size selection tables headers beams. Listed are 46 tables based on common loading conditions for floor joists ceiling joists and rafters. Floor joist span tables for various sizes and species of wood.

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. The 2015 span tables for joists and rafters updates the 2012 edition and provides a simplified system for determining allowable joist and rafter spans for typical loads encountered in one and two family dwellings and is referenced in the 2015 international building code and 2015 international residential code. Span tables f7 rafters a maximum roof pitch of 25 degrees is assumed. Woodsolutions is an industry initiative designed to provide independent non proprietary information about timber and wood products to professionals and companies involved in project development and design and construction in the built environment.

Western wood products association provides the western lumber span tables book in digital format. Southern pine council provides a range of span tables for southern pine joists and rafters. Apa provides span tables for apa structural use panels. Use the span tables below to determine allowable lengths of joists and rafters based on size and standard design loads.

You can also use the wood beam calculator from the american wood council website to determine maximum rafter and joist lengths. Also available for the android os. A tutorial for using the span tables is also available. Updated design values for southern pine dimension lumber effective june 1 2013 are.

Headers beams. Technical diagram on page 35 30mm m aximum allow able sp ans mm sheet roof spacing mm rafter size 600 760 900 1000 1200 66 x 30 850 750 700 700 600 90 x 30 1200 1050 1000 900 850 138 x 30 1700 1550 1400 1300 1200 185 x 30 2000 1750 1600 1550 1400 230 x 30 2000 1800.