Wood Roof Truss Span Tables

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.

Wood roof truss span tables.

Roof floor truss manual 7 31 08 10 43 am page 12. You can use sbca s span charts to roughly determine truss sizes available. Deflection for 30 psf live load. Maximum deflection is limited by l 360 or l 480 under live load.

Also available for the android os. Listed are 46 tables based on common loading conditions for floor joists ceiling joists and rafters. Span tables for jois ts and rafters american wood council 4 span tables for joists and rafters american wood council design criteria. Floor truss span tables alpine engineered products 17 these allowable spans are based on nds 91.

Floor truss span chart each individual floor truss design is unique based on multiple variables. Spacing of trusses are center to center in inches. 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. Simplified maximum span tables for selected visual and mechanical grades of southern pine lumber in sizes 2 4 thru 2 12.

Strength live load of 30 psf plus dead load of 10 psf determines the required bending design value. And parallel to floor truss span strongback lateral supports 24 max. Use the span tables below to determine allowable lengths of joists and rafters based on size and standard design loads. Included are a series of representative roof truss span tables that will give you an idea of the truss spans available for a particular load condition load duration lumber type and truss configuration.

Span calculator for wood joists and rafters also available for the android os. 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. Span tables below illustrate common combinations of the multiple variables available. Basic lumber design values are f 2000 psi f 1100 psi f 2000 psi e 1 800 000 psi duration of load 1 00.

View joist rafter tables. Keep in mind that these tables are for estimations only. 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. Limited to span in inches divided by 360.