The load span tables shown below demonstrate only a tiny subset of the possible combinations available with trussteel cfs roof trusses.
Flat wood roof truss span tables.
Spacing of trusses are center to center in inches.
Floor truss span tables alpine engineered products 17 these allowable spans are based on nds 91.
Flat the most economical flat truss for a roof is provided when the depth of the truss in inches is approximately equal to 7 of the.
For example a 5 12 2 12 combination has approx.
Span calculator for wood joists and rafters also available for the android os.
Flat depth 12.
L d ratiothe ratio of the truss span l to its depth d both dimensions in inches.
Deflection for 30 psf live load.
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.
Limited to span in inches divided by 360.
Roof floor truss manual 7 31 08 10 43 am page 12.
Maximum deflection is limited by l 360 or l 480 under live load.
The same allowable span as a 6 12 3 12.
Span tables for jois ts and rafters american wood council 4 span tables for joists and rafters american wood council design criteria.
Typical roof truss design spans.
Live loadany temporary applied load to a floor truss chord.
Roof truss span tables alpine engineered products 15.
Strength live load of 30 psf plus dead load of 10 psf determines the required bending design value.
You can use sbca s span charts to roughly determine truss sizes available.
Also available for the android os.
Typically roof live load is snow while floor live loads are furniture.
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.
Level returna lumber filler placed horizontally from the end of an overhang to the outside wall to form a soffit.
Member of a truss.
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.
Keep in mind that these tables are for estimations only.
And parallel to floor truss span strongback lateral supports 24 max.
Basic lumber design values are f 2000 psi f 1100 psi f 2000 psi e 1 800 000 psi duration of load 1 00.
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.
