Wood Roof Trusses Span Tables

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.

Wood roof trusses span tables.

Over 51 sizes styles in stock. Span tables use the span tables below to determine allowable lengths of joists and rafters based on size and standard design loads. Trusses must be designed for any special loading such as concentrated loads. Use these two tables for roof rafters with a slope greater than 3 in 12.

Top chord dead load 10 psf. Bottom chord dead load 5 psf. For additional species of lumber check out the rafter span calculator from the american wood council website. They have not been updated for the change in lumber values within the last decade.

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. Straight line interpolation shall be permitted for intermediate spans and design values. And parallel to floor truss span strongback lateral supports 24 max. Center line chase 24 max.

Span calculator for wood joists and rafters also available for the android os. The above spans are based on american softwood lumber standard sizes. Joist and rafter span tables. 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.

You can also use the wood beam calculator from the american wood council website to determine maximum rafter and joist lengths. Roof floor truss manual 7 31 08 10 43 am page 12. Use these two tables for roof rafters with a slope of 3 in 12 or less. Custom trusses up to 100 span.

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. Shop roof trusses spacer floor truss. 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.

Up to 40 open framing for plumbing. Keep in mind that these tables are for estimations only.