Roof Truss Spacing

Once you ve calculated the number of trusses you will need you should purchase the lumber.

Roof truss spacing.

Putting the trusses into place. Roof truss spacing seems to be a topic with no consensus. 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. Typical standard the typical standard for the spacing on the roof trusses is 24 inches.

These are typically spaced at certain intervals to provide the necessary support for the roof. The bay is the space within the truss and the longitudinal joining members are purlins. This is important to consider and measure exactly because if you are few millimeters out away from your actual place for truss it will put immense pressure on that truss. 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.

36 long garage with 12 bays. 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. What dictates the truss design is the roof design snow load typically 20 or 30 psf in most of the u s. Metal roofs and pole buildings.

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. These standards are as follows. Most are spaced between 18 26 inches apart. 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.

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. But in general it doesn t matter if the truss spacing is at 12 16 or 24 inches. Another factor that will have its impact on truss spacing is the width of building.