Residential Roof Truss Spans

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.

Residential roof truss spans.

If we go any larger it will require more webbing inside the truss which will directly affect the cost of the truss. Custom trusses up to 100 span. 8 10 foot 1 10 foot 1. Here s a common truss design.

Spread web storage trusses are engineered to have a small area to allow storage within. The typical overhang for residential is between 16 inches and 24 inches. Just as there are many types of roofs with many roof parts there are many different types of roof trusses this extensive article explains through a series of custom truss diagrams the different truss configurations you can use for various roofs. Up to 40 open framing for plumbing.

Click to add item 26 spreadweb residential roof truss 6 12 pitch 87 to the compare list. Over 51 sizes styles in stock. 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.

Keep in mind that these tables are for estimations only. The same is true if we make it steeper. Basic lumber design values are f 2000 psi f 1100 psi f 2000 psi e 1 800 000 psi duration of load 1 00. These allowable spans are based on nds 91.

They have not been updated for the change in lumber values within the last decade. 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. When making a selection below to narrow your results down each selection made will reload the page to display the desired results. 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.

Shop roof trusses spacer floor truss. 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. Again this length can be adjusted to fit the need of the truss. Overhang this is the extra part that extends beyond the exterior wall of the home.

Post frame trusses are designed to be placed at spans greater than two feet on center.