Maximum Span Of Roof Trusses In Ft

So the space between rafters can be greater without reducing the maximum span.

Maximum span of roof trusses in ft.

Bear in mind that this span chart shows the absolute maximum span for a truss with no hvac. To achieve maximum indicated spans trusses may require six or more panels. Douglas fir maximum horizontal roof rafter span for lumber grade selected structural and no. The same concept holds true for roof trusses.

Below is a chart that we use for quick reference to match floor truss height and spacing with any given span. 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. Live load is weight of furniture wind snow and more. The heaviest joist along with the above factors will span a maximum of 23 feet 8 inches.

Mono used where the roof is required to. Contact your localalpine trussmanufacturerorofficeformoreinformation. 1 psf lb f ft 2 47 88 n m 2. Span calculator for wood joists and rafters also available for the android os.

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. For example an 8 10 metre span for a timber truss is quite a long one and can lead to problems. One of the biggest advantages of floor trusses is that they can span further than conventional framing i e. 1 in 25 4 mm.

1 ft 0 3048 m. Also available for the android os. Dead load weight of structure and fixed loads 15 lbs ft 2. 2 are indicated below.

Trusses with an asterisk that exceed 14 in height may be shipped in two pieces. Live load 20 lbs ft 2 956 n m 2.