Roof Truss Span Distance

Overhang this is the extra part that extends beyond the exterior wall of the home.

Roof truss span distance.

After the braces are in place you will mark the distance from the edge of the building to where you would like to attach your first truss. Equation a2 b2 c2. Span also known as gable width this is based on the total footprint of the house and refers to the distance between two exterior walls. For example a roof with a span of 20 ft and a rise of 7 feet needs rafters that are the square root of 400 49 21 2 feet.

Contact your localalpine trussmanufacturerorofficeformoreinformation. Trusses with an asterisk that exceed 14 in height may be shipped in two pieces. The roof truss spacing standard is important because eighty percent of new homes are built with standard pre fabricated trusses. C rafter length.

Mono used where the roof is required to. Typical roof truss. For instance if you are spacing your trusses 18 inches apart make a mark 18 inches from the edge. To achieve maximum indicated spans trusses may require six or more panels.

Standard roof truss spacing. These standards are as follows. For example in the rafter span table below the highlighted cell in the 40 live load table indicates that 2 x 8 southern yellow pine joists that have a grade of 2 that are spaced 24 apart can have a maximum span of 10 feet 3 inches 10 3 if designing for a live load of 40 lbs ft 2.