Wood Roof Truss Span Tables

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

Wood roof truss span tables.

You can also use the wood beam calculator from the american wood council website to determine maximum rafter and joist lengths. 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. 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. And parallel to floor truss span strongback lateral supports 24 max.

Listed are 46 tables based on common loading conditions for floor joists ceiling joists and rafters. Span calculator for wood joists and rafters also available for the android os. Tcll 40 psf tcll 80 psf tcll 125 psf truss spacing truss spacing truss spacing. Use the span tables below to determine allowable lengths of joists and rafters based on size and standard design loads.

Floor truss span tables alpine engineered products 17 these allowable spans are based on nds 91. 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. Also available for the android os. Simplified maximum span tables for selected visual and mechanical grades of southern pine lumber in sizes 2 4 thru 2 12.

Spacing of trusses are center to center in inches. Floor truss span chart each individual floor truss design is unique based on multiple variables. Limited to span in inches divided by 360. Roof floor truss manual 7 31 08 10 43 am page 12.

Deflection for 30 psf live load. 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. Geometry loading spacing bearing conditions etc. Span tables for jois ts and rafters american wood council 4 span tables for joists and rafters american wood council design criteria.

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. Span tables below illustrate common combinations of the multiple variables available.