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.

Maximum span of roof trusses in ft.

1 ft 0 3048 m. Also available for the android os. Mono used where the roof is required to. One of the biggest advantages of floor trusses is that they can span further than conventional framing i e.

Live load 20 lbs ft 2 956 n m 2. 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. Live load is weight of furniture wind snow and more. 1 in 25 4 mm.

To achieve maximum indicated spans trusses may require six or more panels. 1 psf lb f ft 2 47 88 n m 2. Dead load weight of structure and fixed loads 15 lbs ft 2. 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. 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. Contact your localalpine trussmanufacturerorofficeformoreinformation.

So the space between rafters can be greater without reducing the maximum span. Bt b tc 6 6 common truss configurations for the most widely designed roof shapes. 2x10 s or 2x12 s or i joists. This is the most common as the typical span is 15 feet.

Trusses with an asterisk that exceed 14 in height may be shipped in two pieces. Span calculator for wood joists and rafters also available for the android os.