Residential Roof Truss Spans

They have not been updated for the change in lumber values within the last decade.

Residential roof truss spans. The same is true if we make it steeper. 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. Click to add item 26 spreadweb residential roof truss 6 12 pitch 87 to the compare list. If we go any larger it will require more webbing inside the truss which will directly affect the cost of the truss.

Post frame trusses are designed to be placed at spans greater than two feet on center. Basic lumber design values are f 2000 psi f 1100 psi f 2000 psi e 1 800 000 psi duration of load 1 00. Over 51 sizes styles in stock. While this article focuses on configurations we also have a very cool set of illustrations showcasing the different parts anatomy of roof trusses.

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. 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. Overhang this is the extra part that extends beyond the exterior wall of the home. The typical overhang for residential is between 16 inches and 24 inches.

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. When making a selection below to narrow your results down each selection made will reload the page to display the desired results. 8 10 foot 1 10 foot 1. Post frame trusses can be used for agricultural residential commercial or industrial use.

This 26 span truss with a 4 12 roof pitch is the most economical truss we can build. Maximum deflection is limited by l 360 or l 480 under live load. Spread web storage trusses are engineered to have a small area to allow storage within. Keep in mind that these tables are for estimations only.

Here s a common truss design. Again this length can be adjusted to fit the need of the truss. Shop roof trusses spacer floor truss. Spacing of trusses are center to center in inches.

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.