Standard Roof Truss Lengths

To achieve maximum indicated spans trusses may require six or more panels.

Standard roof truss lengths. A truss with the same pitch and heel on both sides and a peak at the center is called a common 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. 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. While pitch and slope are used interchangeably they are not the same span also known as gable width this is based on the total footprint of the house and refers to the distance between two exterior.

The typical overhang for residential is between 16 inches and 24 inches. 600 timber thickness mm. Post frame roof truss 23 residential end frame 1 residential roof truss 88 common 60. You can use sbca s span charts to roughly determine truss sizes available.

Mono used where the roof is required to. Member size grade tc 1 4 4 7 97 tr26 bc 6 10 72 tr26 bc 10 2 72 tr26 wb 3 8 5 9 72 tr26 wb 4 8 4 9 72 tr26. If the overhang is more than around 2 6 it will require a 2 6 top cord for the tail section to handle that amount. Standard framing details for use in preliminary design.

Common or standard trusses are symmetrical and have standard four inch heels. Contact your localalpine trussmanufacturerorofficeformoreinformation. Pitch this is the incline of the roof expressed as a fraction. 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.

Bt b tc 6 6 common truss configurations for the most widely designed roof shapes. Easily attached to the rest of the building s frame they circumvent the complicated expensive nature of from scratch roof framing and can be purchased in a wide variety of designs made from either lumber commonly used for homes or metal primarily used for commercial. All truss images are for visual aid only and may not truly represent the roof truss supplied or designed by your chosen supplier. While this article focuses on configurations we also have a very cool set of illustrations showcasing the different parts anatomy of roof trusses.

Girder trusses are designed to carry additional loads other than standard roof loads. Essentially a roof truss is a prefabricated frame of supports designed to go on top of a building as it s being built. This length can easily be changed to fit the need of the truss.