Maximum Span Of Roof Trusses

Bt b tc 6 6 common truss configurations for the most widely designed roof shapes.

Maximum span of roof trusses.

Trusses with an asterisk that exceed 14 in height may be shipped in two pieces. Maximum birdsmouth 1 3rd rafter depth 30 minimum. Live load is weight of furniture wind snow and more. For example an 8 10 metre span for a timber truss is quite a long one and can lead to problems.

Ideally it is better to subdivide this into. Live load 20 lbs ft2 956 n m2 maximum span ft in nominal size. Spans in excess of these. You can use sbca s span charts to roughly determine truss sizes available.

Contact your localalpine trussmanufacturerorofficeformoreinformation. Also available for the android os. Provision for creating extra. The lower chords are resting on a wall in one half of the house and on the other half of the house they span the whole width with no support.

Included are a series of representative roof truss span tables that will give you an idea of the truss spans available for a particular load condition load duration lumber type and truss configuration. To determine how many trusses to create you will first need to measure both the width and the length of the structure you are building. Just bought a house and wife wants a wall knocked down. Span calculator for wood joists and rafters also available for the android os.

Attic trusses roof space using attic trusses can achieve up to 50 more living area. The trusses should be a little longer than the exact width to allow for overhang and you will need sufficient trusses to mount across the length. Follow this guide to ensure the spacing and stability of your diy roof trusses. 1 ft 0 3048 m.

1 psf lbf ft2 47 88 n m2. Dead load weight of structure and fixed loads 15 lbs ft2. 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. Keep in mind that these tables are for estimations only.

Mono used where the roof is required to. 1 in 25 4 mm. To achieve maximum indicated spans trusses may require six or more panels.