Wood Roof Truss Span Table

Floor truss span tables alpine engineered products 17 these allowable spans are based on nds 91.

Wood roof truss span table.

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. 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. 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.

Floor truss span chart each individual floor truss design is unique based on multiple variables. You can also use the wood beam calculator from the american wood council website to determine maximum rafter and joist lengths. Roof floor truss manual 7 31 08 10 43 am page 12. Deflection for 30 psf live load.

And parallel to floor truss span strongback lateral supports 24 max. Span tables below illustrate common combinations of the multiple variables available. 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. Tcll 40 psf tcll 80 psf tcll 125 psf truss spacing truss spacing truss spacing.

Basic lumber design values are f 2000 psi f 1100 psi f 2000 psi e 1 800 000 psi duration of load 1 00. Strength live load of 30 psf plus dead load of 10 psf determines the required bending design value. Span tables for jois ts and rafters american wood council 4 span tables for joists and rafters american wood council design criteria. Maximum deflection is limited by l 360 or l 480 under live load.

View joist rafter tables. Listed are 46 tables based on common loading conditions for floor joists ceiling joists and rafters. Spacing of trusses are center to center in inches. 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.

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