2x6 Roof Rafter Span

1 psf lb f ft 2 47 88 n m 2.

2x6 roof rafter span.

This rafter span calculator is species specific for douglas fir hemlock etc. These numbers are for roofs supporting light loads of 20 pounds for square foot. Dead load weight of structure and fixed loads 15 lbs ft 2. 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.

Live load is weight of furniture wind snow and more. The pitch and span of your roof will dictate how long of a rafter you ll need use maximum span calculator to help you find your rafter size. Douglas fir maximum horizontal roof rafter span for lumber grade selected structural and no. 2 are indicated below.

More roof calculators roof truss calculator how to cut rafters. Anything beyond that you are looking at using 2x6s for most sheds. Can span up to 13 4. An spf roof at the same spacing and lumber size will span 11.

If you look at the rafter span chart you ll notice that 2x4s can be used for rafters on spans up to 11. That means it can span a total length of over 26 for a gable roof. To size joists and rafters use the maximum span tables for southern yellow pine. Also available for the android os.

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. Span calculator for wood joists and rafters also available for the android os. The spans in this table are based on a maximum supported rafter span of 16 feet where the supported span is the total horizontal distance spanned by the roof rafters divided in half not the diagonal distance or the length of the rafter. 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.

For heavy roofs or in areas with substantial snowfall or winds call your local building department for code requirements. 1 ft 0 3048 m.