Wood Roof Truss Span Table

You can use sbca s span charts to roughly determine truss sizes available.

Wood roof truss span table. Floor truss span tables alpine engineered products 17 these allowable spans are based on nds 91. Keep in mind that these tables are for estimations only. Listed are 46 tables based on common loading conditions for floor joists ceiling joists and rafters. Limited to span in inches divided by 360.

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. Span tables for jois ts and rafters american wood council 4 span tables for joists and rafters american wood council design criteria. Geometry loading spacing bearing conditions etc. Span tables below illustrate common combinations of the multiple variables available.

Floor truss span chart each individual floor truss design is unique based on multiple variables. Maximum deflection is limited by l 360 or l 480 under live load. 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.

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. Spacing of trusses are center to center in inches. Basic lumber design values are f 2000 psi f 1100 psi f 2000 psi e 1 800 000 psi duration of load 1 00. 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.

View joist rafter tables. Roof floor truss manual 7 31 08 10 43 am page 12. Strength live load of 30 psf plus dead load of 10 psf determines the required bending design value. You can also use the wood beam calculator from the american wood council website to determine maximum rafter and joist lengths.

Deflection for 30 psf live load. And parallel to floor truss span strongback lateral supports 24 max.