Flat Wood Roof Truss Span Tables

Use the span tables below to determine allowable lengths of joists and rafters based on size and standard design loads.

Flat wood roof truss span tables.

Span calculator for wood joists and rafters also available for the android os. The load span tables shown below demonstrate only a tiny subset of the possible combinations available with trussteel cfs roof trusses. 05425 cold formed steel trusses roof truss spans every trussteel roof truss is a custom design based upon the unique load span bearing use and code criteria of a particular project. Roof floor truss manual 7 31 08 10 43 am page 12.

Simplified maximum span tables for selected visual and mechanical grades of southern pine lumber in sizes 2 4 thru 2 12. 72 5 0 mi ni m u m girder floor truss floor truss jacks a a bearing wall girder floor truss floor truss jacks bearing wall cantilevered floor truss two 2x rim joists 24 max. Listed are 46 tables based on common loading conditions for floor joists ceiling joists and rafters. Maximum deflection is limited by l 360 or l 480 under live load.

Roof truss span tables alpine engineered products 15 top chord 2x4 2x6 2x6 2x4 2x6 2x6 2x4 2x6 2x6 2x4 2x6 2x6 bottom chord 2x4 2x4 2x6 2x4 2x4 2x6 2x4 2x4 2x6 2x4 2x4 2x6 2 12 24 24 33 27 27 37 31 31 43 33 33 46 2 5 12 29 29 39 33 33 45 37 38 52 39 40 55 3 12 34 34 46 37 39 53 40 44 60 43 46 64 3 5 12 39 39 53 41 44 61 44 50 65 47 52 70. You can use sbca s span charts to roughly determine truss sizes available. And parallel to floor truss span strongback lateral supports 24 max. Keep in mind that these tables are for estimations only.

Rafter span tables use these tables to determine lengths sizes and spacing of rafters based on a variety of factors such as species load grade spacing and pitch. Spacing of trusses are center to center in inches. View joist rafter tables. Also available for the android os.

Visit the roof framing page for more information on cutting roof rafters and visit the roof pitch calculator for determining rafter lengths based on rise and run. Floor truss span tables alpine engineered products 17 these allowable spans are based on nds 91. You can also use the wood beam calculator from the american wood council website to determine maximum rafter and joist lengths.