Maximum Span Of Roof Trusses In Ft

The size of a timber truss is an important part of designing a building and while there are no set maximum sizes there are some best practices.

Maximum span of roof trusses in ft. Bt b tc 6 6 common truss configurations for the most widely designed roof shapes. Common spacing for trusses on this type of building is often between 2 and 4 feet but trusses built with advanced designs may allow spacing as great as 8 or 12 feet. 1 ft 0 3048 m. Douglas fir maximum horizontal roof rafter span for lumber grade selected structural and no.

Below is a chart that we use for quick reference to match floor truss height and spacing with any given span. Dead load weight of structure and fixed loads 15 lbs ft 2. 1 in 25 4 mm. Mono used where the roof is required to.

For example an 8 10 metre span for a timber truss is quite a long one and can lead to problems. The heaviest joist along with the above factors will span a maximum of 23 feet 8 inches. Also available for the android os. 2x10 s or 2x12 s or i joists.

Span calculator for wood joists and rafters also available for the android os. So the space between rafters can be greater without reducing the maximum span. 1 psf lb f ft 2 47 88 n m 2. Trusses with an asterisk that exceed 14 in height may be shipped in two pieces.

This is the most common as the typical span is 15 feet. To achieve maximum indicated spans trusses may require six or more panels. 2 are indicated below. One of the biggest advantages of floor trusses is that they can span further than conventional framing i e.

The same concept holds true for roof trusses. Live load is weight of furniture wind snow and more.