Roof Hip Spans

Dead load weight of structure and fixed loads 15 lbs ft 2.

Roof hip spans.

Hip girder truss a pitch truss with a truncated or flat apex so that it can support more load. For heavy roofs or in areas with substantial snowfall or winds call your local building department for code requirements. Span calculator for wood joists and rafters also available for the android os. 2 are indicated below.

Wood beam calculator american wood council website rafter and joist span faq. Live load is weight of furniture wind snow and more. Span for the main rafters measure from outside of wall to outside of wall. 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.

Spacing should be interpreted as the centre to centre distance between adjacent parallel members. Required size for a given span. 1 ft 0 3048 m. The 1 grade.

So this table could accommodate a house with a total rafter span or house width of 32 feet. The hip roof framing calculator returns the value of the main rafter the side rafter the length of the hip the height of the knee wall and the lengths of the jack rafters. The lengths and sizes of joists vary depending on the species and quality of the lumber used. Hip roofs are more stable than gable roofs and more resistant to strong winds and hurricane.

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. Select the following information by using the drop downs to enter values in feet and inches. 1 psf lb f ft 2 47 88 n m 2. Douglas fir maximum horizontal roof rafter span for lumber grade selected structural and no.

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 example you can span a 1 grade no knots southern yellow pine a greater distance than a 2 grade with knots southern yellow pine. Also available for the android os.