Hip Roof Maximum Span

1 in 25 4 mm.

Hip roof maximum span.

Where the roof length l is long compared to the half span h of the roof truss such that it would result in a brace angle less than 30 two or more crossed bracing bays shall be required each side of the ridge line to ensure the brace angle is between 30 and 45 see figure c5 04 04 04. 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. Span calculator for wood joists and rafters also available for the android os. For example in the rafter span table below the highlighted cell in the 40 live load table indicates that 2 x 8 southern yellow pine joists that have a grade of 2 that are spaced 24 apart can have a maximum span of 10 feet 3 inches 10 3 if designing for a live load of 40 lbs ft 2.

So this table could accommodate a house with a total rafter span or house width of 32 feet. 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. 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. Also available for the android os.

Dead load weight of structure and fixed loads 15 lbs ft2. 1 psf lbf ft2 47 88 n m2. For heavy roofs or in areas with substantial snowfall or winds call your local building department for code requirements. Live load 20 lbs ft2 956 n m2 maximum span ft in nominal size.