Beam Span Flat Roof Truss Span Tables

The same allowable span as a 6 12 3 12.

Beam span flat roof truss span tables.

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. For heavy roofs or in areas with substantial snowfall or winds call your local building department for code requirements. Loads are calculated in accordance with table 3 1 of as nzs 1170 1 2002. Span tables for flat roof joists to bs 5268 7 2 imposed loads of 0 75 kn m for maintenance and snow load are applicable where there is no permanent access no fixed ladder or staircase and most areas where the altitude does not exceed 100 metres refer to bs 6399 3.

You can also use the wood beam calculator from the american wood council website to determine maximum rafter and joist lengths. Tables providing size selections for various beam spans and loading combinations for southern pine dimension lumber and southern pine glued laminated timber are available for the following applications. Span calculator for wood joists and rafters also available for the android os. Allowable load tables.

Also available for the android os. Maximum rafter spans for a patio roof in areas with mild climates patio roofs are generally designed for loads of 30 psf pounds per square foot. Roof truss span tables alpine engineered products 15. Posts these span tables are designed for a minimum post size of 50 x 50 x 2 5mm up to a maximum height of 3 0m.

Flat roof span tables allow for a maximum roof pitch of 5º. Tables 13 14. For example a 5 12 2 12 combination has approx. Maximum clear span of flat roof joists in metres for sc3 timber spacing between joists size of roof joist 400mm 450mm 600mm 47 x 97 1 84 1 81 1 74.

Headers beams. 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. Live load point load kn. Roof pitch use recommended minimum roof pitches as specified by roof sheet supplier.

This is set by the roof use you selected in the previous screen and cannot be modified.