Roof Truss Centres

A timber roof truss is a structural framework of timbers designed to bridge the space above a room and to provide support for a roof trusses usually occur at regular intervals linked by longitudinal timbers such as purlins the space between each truss is known as a bay.

Roof truss centres.

Trusses are generally spaced at 600mm centres giving economy in the use of timber. Standard roof truss general load settings. 0 250 kn m ceiling live load 0 250 kn m tank load 0 450 kn max tile batten centres. 600 timber thickness mm.

Architects and developers have a free rein in forming economic. 0 524 kn m ceiling dead load. Click to add item 24 spreadweb residential roof truss 5 12 pitch 87 to the compare list. 35 timber size information.

Erection procedure is simple and repetitive requiring only a minimum of skilled labour. Typical roof truss spacing means that they are usually about 24 inches from centre which means at the centre of one truss there will be a two foot gap or twenty four inch gap until the centre of the next truss. Compare click to add item 24 spreadweb residential roof truss 5 12 pitch 87 to the compare list. 360 mm general truss information.

Pre manufactured stock trusses are constructed with spruce pine fir spf or southern yellow pine syp lumber. These standards are as follows. Roof truss span tables alpine engineered products 15 top chord 2x4 2x6 2x6 2x4 2x6 2x6 2x4 2x6 2x6 2x4 2x6 2x6 bottom chord 2x4 2x4 2x6 2x4 2x4 2x6 2x4 2x4 2x6 2x4 2x4 2x6 2 12 24 24 33 27 27 37 31 31 43 33 33 46 2 5 12 29 29 39 33 33 45 37 38 52 39 40 55 3 12 34 34 46 37 39 53 40 44 60 43 46 64 3 5 12 39 39 53 41 44 61 44 50 65 47 52 70. 0 785 kn m snow load.

They are designed at a 4 12 pitch to be spaced 2 foot on center. Rafters have a tendency to flatten under gravity thrusting outwards on the walls. The benefits of roof trusses. These trusses the meet building code criteria as specified by structural building components of america sbca and the truss plate institute tpi.

It will use the current cost of wooden rafters based on the average price found at home improvement stores. Roof trusses provide more economic solutions than traditional roofing methods.