Residential Roof Truss Spans

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

Residential roof truss spans.

If the overhang extends beyond 24 inches say to 30 inches then a 2 6 top chord for the tail section will be required to handle the additional overhang. Over 51 sizes styles in stock. Custom trusses up to 100 span. The same is true if we make it steeper.

Maximum deflection is limited by l 360 or l 480 under live load. This 26 span truss with a 4 12 roof pitch is the most economical truss we can build. Up to 40 open framing for plumbing. 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.

If we go any larger it will require more webbing inside the truss which will directly affect the cost of the truss. Flat the most economical flat truss for a roof is provided when the depth of the truss in inches is approximately equal to 7 of the span in inches. While this article focuses on configurations we also have a very cool set of illustrations showcasing the different parts anatomy of roof trusses. When making a selection below to narrow your results down each selection made will reload the page to display the desired results.

Spread web storage trusses are engineered to have a small area to allow storage within. Again this length can be adjusted to fit the need of the truss. Post frame trusses can be used for agricultural residential commercial or industrial use. Basic lumber design values are f 2000 psi f 1100 psi f 2000 psi e 1 800 000 psi duration of load 1 00.

They have not been updated for the change in lumber values within the last decade. These allowable spans are based on nds 91. Here s a common truss design. 8 10 foot 1 10 foot 1.

Shop roof trusses spacer floor truss. Included are a series of representative roof truss span tables that will give you an idea of the truss spans available for a particular load condition load duration lumber type and truss configuration. Post frame trusses are designed to be placed at spans greater than two feet on center. Keep in mind that these tables are for estimations only.

Spacing of trusses are center to center in inches.