Roof Trusses Design Standards

Almost all residential trusses use this spacing.

Roof trusses design standards.

Common or standard trusses are symmetrical and have standard four inch heels. Trusses must be designed for any special loading such as concentrated loads from hanging partitions or air conditioning units and snow loads caused by driftingnearparapetorslide offfromhigherroofs. Boards may be reduced slightly. Metal plate connected trusses are used to create arches of all types.

The standard roof truss spacing is 2. Girder trusses are designed to carry additional loads other than standard roof loads. A large number of home designs benefit from roof truss designs saving their owners money compared to other timber alternatives. As a testament to their strength wood trusses are used in concrete formwork.

A truss with the same pitch and heel on both sides and a peak at the center is called a common truss. Wood trusses used in specialized applications such as agricultural and commercial buildings provide spans exceeding 25m 80. To achieve maximum indicated spans trusses may require six or more panels. There is a misconception that spacing trusses every 16 on center is better because it will be strong than the average 2.

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. The truss plate institute tpi serves the truss industry by providing in plant third party quality assurance inspections audits guidelines on the bracing handling and safety of trusses standards development and related design and quality control publications and tools. These standards are as follows. Our manufacturing process makes the most efficient use of timber and ensures minimal timber wastage.