Wood Roof Truss Span Table

Floor truss span chart each individual floor truss design is unique based on multiple variables.

Wood roof truss span table.

Floor truss span tables alpine engineered products 17 these allowable spans are based on nds 91. View joist rafter tables. Span tables below illustrate common combinations of the multiple variables available. Strength live load of 30 psf plus dead load of 10 psf determines the required bending design value.

Geometry loading spacing bearing conditions etc. And parallel to floor truss span strongback lateral supports 24 max. Keep in mind that these tables are for estimations only. Tcll 40 psf tcll 80 psf tcll 125 psf truss spacing truss spacing truss spacing.

Listed are 46 tables based on common loading conditions for floor joists ceiling joists and rafters. 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. 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. Use the span tables below to determine allowable lengths of joists and rafters based on size and standard design loads.

Span tables for jois ts and rafters american wood council 4 span tables for joists and rafters american wood council design criteria. 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. 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. You can also use the wood beam calculator from the american wood council website to determine maximum rafter and joist lengths.

Maximum deflection is limited by l 360 or l 480 under live load. Basic lumber design values are f 2000 psi f 1100 psi f 2000 psi e 1 800 000 psi duration of load 1 00. Deflection for 30 psf live load. Roof floor truss manual 7 31 08 10 43 am page 12.

Spacing of trusses are center to center in inches. Simplified maximum span tables for selected visual and mechanical grades of southern pine lumber in sizes 2 4 thru 2 12.