Flat Wood Roof Truss Span Tables

Roof floor truss manual 7 31 08 10 43 am page 12.

Flat wood roof truss span tables. Span calculator for wood joists and rafters also available for the android os. 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. Live loadany temporary applied load to a floor truss chord. 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. The same allowable span as a 6 12 3 12. Floor truss span tables alpine engineered products 17 these allowable spans are based on nds 91. Member of a truss.

For example a 5 12 2 12 combination has approx. L d ratiothe ratio of the truss span l to its depth d both dimensions in inches. Span tables use the span tables below to determine allowable lengths of joists and rafters based on size and standard design loads. You can use sbca s span charts to roughly determine truss sizes available.

Typical roof truss design spans. 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. Span tables for jois ts and rafters american wood council 4 span tables for joists and rafters american wood council design criteria. Flat depth 12.

Deflection for 30 psf live load. And parallel to floor truss span strongback lateral supports 24 max. Level returna lumber filler placed horizontally from the end of an overhang to the outside wall to form a soffit. The load span tables shown below demonstrate only a tiny subset of the possible combinations available with trussteel cfs roof trusses.

Spacing of trusses are center to center in inches. Also available for the android os. Limited to span in inches divided by 360. Keep in mind that these tables are for estimations only.

Maximum deflection is limited by l 360 or l 480 under 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. Typically roof live load is snow while floor live loads are furniture. 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.

Roof truss span tables alpine engineered products 15.