Roof Rafter Span Fir 3x8

1 ft 0 3048 m.

Roof rafter span fir 3x8.

Here we have a wood framed gable roof. 2 are indicated below. Tables listing maximum spans for southern pine joists and rafters are detailed below. 1 psf lb f ft 2 47 88 n m 2.

While every effort has been made to insure the accuracy of the information presented and special effort has been made to assure that the information reflects the state of the art neither the west coast lumber inspection bureau the american wood council nor its members assume any responsibility for any particular design prepared from this online span calculator. To size joists and rafters use the maximum span tables for southern yellow pine. Dead load weight of structure and fixed loads 15 lbs ft 2. More roof calculators roof truss calculator how to cut rafters.

Let s consider a basic gable wood roof framing design. 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. Douglas fir maximum horizontal roof rafter span for lumber grade selected structural and no. Continuing on from part 3.

Also available for the android os. Floor beam span tables of residential structural design we will now look at roof rafter and beam design. The image below shows a cross section of our simple 12 x 13 house from the joist span tables section of this tutorial. This rafter span calculator is species specific for douglas fir hemlock etc.

Span calculator for wood joists and rafters also available for the android os. These 46 tables are based upon design values for visually graded southern pine dimension lumber that became effective june 1 2013. Span calculator for wood joists and rafters available for the iphone. Span calculator for wood joists and rafters 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. 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 each application a pdf download is available. This is based upon the span of the rafter horizontal span not total rafter length live and dead loads.