Wood Roof Truss Span Table

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.

Wood roof truss span table.

Simplified maximum span tables for selected visual and mechanical grades of southern pine lumber in sizes 2 4 thru 2 12. Maximum deflection is limited by l 360 or l 480 under live load. 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. 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 tables for jois ts and rafters american wood council 4 span tables for joists and rafters american wood council design criteria. Strength live load of 30 psf plus dead load of 10 psf determines the required bending design value. Deflection for 30 psf live load.

Limited to span in inches divided by 360. Geometry loading spacing bearing conditions etc. View joist rafter tables. You can also use the wood beam calculator from the american wood council website to determine maximum rafter and joist lengths.

Basic lumber design values are f 2000 psi f 1100 psi f 2000 psi e 1 800 000 psi duration of load 1 00. Spacing of trusses are center to center in inches. 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. Tcll 40 psf tcll 80 psf tcll 125 psf truss spacing truss spacing truss spacing.

Floor truss span tables alpine engineered products 17 these allowable spans are based on nds 91. 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. Span tables below illustrate common combinations of the multiple variables available. And parallel to floor truss span strongback lateral supports 24 max.

Roof floor truss manual 7 31 08 10 43 am page 12. Floor truss span chart each individual floor truss design is unique based on multiple variables.