For heavy roofs or in areas with substantial snowfall or winds call your local building department for code requirements.
Flat roof 50 feet span steel table.
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.
The load span tables shown below demonstrate only a tiny subset of the possible combinations available with trussteel cfs roof trusses.
The figures are based on quality materials.
For example in the rafter span table below the highlighted cell in the 40 live load table indicates that 2 x 8 southern yellow pine joists that have a grade of 2 that are spaced 24 apart can have a maximum span of 10 feet 3 inches 10 3 if designing for a live load of 40 lbs ft 2.
The tables below give maximum spans for rafters and beams.
In areas with mild climates patio roofs are generally designed for loads of 30 psf pounds per square foot.
These span tables are the equivalent of other industry standard span tables and are calculated to the same standards.
These spans were calculated using our flat roof joist calculation engine.
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.
Click on a span to generate a full calculation you can adjust the exact span.
Flat roof span tables allow for a maximum roof pitch of 5ยบ.