Wood Roof Truss Span Tables

Bottom chord dead load 5 psf.

Wood roof truss span tables.

Limited to span in inches divided by 360. 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. Deflection for 30 psf live load.

Top chord dead load 10 psf. Listed are 46 tables based on common loading conditions for floor joists ceiling joists and rafters. Keep in mind that these tables are for estimations only. Floor truss span tables.

Basic lumber design values are f 2000 psi f 1100 psi f 2000 psi e 1 800 000 psi duration of load 1 00. Span tables use the span tables below to determine allowable lengths of joists and rafters based on size and standard design loads. Use these two tables for roof rafters with a slope greater than 3 in 12. Span calculator for wood joists and rafters also available for the android os.

Also available for the android os. Joists rafters simplified maximum span tables for selected visual and mechanical grades of southern pine lumber in sizes 2 4 thru 2 12. 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 use sbca s span charts to roughly determine truss sizes available.

Maximum deflection is limited by l 360 or l 480 under live load. Floor truss span tables. Spacing of trusses are center to center in inches. The load span tables shown below demonstrate only a tiny subset of the possible combinations available with trussteel cfs roof trusses.

Rafter span tables use these two tables for roof rafters with a slope of 3 in 12 or less. 05425 cold formed steel trusses roof truss spans every trussteel roof truss is a custom design based upon the unique load span bearing use and code criteria of a particular project. The above spans are based on american softwood lumber standard sizes. 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. 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. Joist and rafter span tables. Center line chase 24 max.

You can also use the wood beam calculator from the american wood council website to determine maximum rafter and joist lengths.