Roof Truss Spacing

As most building these days are using those pre made trusses on the roof 24 inches become the main size for any roofing construction when it comes to its truss installation.

Roof truss spacing.

Although the standard spacing of roof trusses may be the same as that of rafters with 24 inch spacing being a common option the design of a truss may allow for the use of a lower grade of lumber than would be required for rafters with comparable spacing and span. Most are spaced between 18 26 inches apart. Metal roofs and pole buildings. 36 long garage with 12 bays.

Most americans live in traditional stick framed houses apartments or condominiums where roof trusses if they were utilized rather than using dimensional lumber rafters are most typically spaced every two feet. 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. Yet somewhere in the deep dark reaches of history lies the theory wood trusses must be spaced no more than 24 on center or maybe 48 or perhaps even eight or ten feet. The bay is the space within the truss and the longitudinal joining members are purlins.

This is most likely the standard size that you will find on pre made roof trusses. A roof truss is a structural framework usually made from wood that bridges the space between the ceiling of the top level and the roof structure. 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. Another factor that will have its impact on truss spacing is the width of building.

Once you ve calculated the number of trusses you will need you should purchase the lumber. Putting the trusses into place. Roof truss spacing seems to be a topic with no consensus. These standards are as follows.

These are typically spaced at certain intervals to provide the necessary support for the roof. What dictates the truss design is the roof design snow load typically 20 or 30 psf in most of the u s. The reality is there is no magic number.