Roof Hip Spans

2 are indicated below.

Roof hip spans.

Douglas fir maximum horizontal roof rafter span for lumber grade selected structural and no. 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. 1 ft 0 3048 m.

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 1 grade. Hip roofs are more stable than gable roofs and more resistant to strong winds and hurricane. They must must be on the same level.

Span for the main rafters measure from outside of wall to outside of wall. The lengths and sizes of joists vary depending on the species and quality of the lumber used. Roof load width rlw and floor load width flw can be determined from as1684 or from the images below. Wood beam calculator american wood council website rafter and joist span faq.

For heavy roofs or in areas with substantial snowfall or winds call your local building department for code requirements. Select the following information by using the drop downs to enter values in feet and inches. Spacing should be interpreted as the centre to centre distance between adjacent parallel members. Live load is weight of furniture wind snow and more.

Dead load weight of structure and fixed loads 15 lbs ft 2. 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. 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. Hip girder truss a pitch truss with a truncated or flat apex so that it can support more load.

Also available for the android os. So this table could accommodate a house with a total rafter span or house width of 32 feet. 1 psf lb f ft 2 47 88 n m 2.