Standard Roof Truss Widths

The average overhang for trusses used for housing or related buildings with a finished soffit is between 1 4 to 2.

Standard roof truss widths.

It will use the current cost of wooden rafters based on the average price found at home improvement stores. Top chord 2x4 2x6 2x6 2x4 2x6 2x6 2x4 2x6 2x6 2x4 2x6 2x6 bottom chord 2x4 2x4 2x6 2x4 2x4 2x6 2x4 2x4 2x6 2x4 2x4 2x6 2 12 24 24 33 27 27 37 31 31 43 33 33 46 2 5 12 29 29 39 33 33 45 37 38 52 39 40 55 3 12 34 34 46 37 39 53 40 44 60 43 46 64 3 5 12 39 39 53 41 44 61 44 50 65 47 52 70 4 12 41 43 59 43 49 64 46 56 69 49 57 74 5 12 44 52 67 46 58 69 49 66 74 53 66 80 6 12 46 60 69 47 67 71 51 74 76 55 74 82 7 12 47 67 70 48. 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. All truss images are for visual aid only and may not truly represent the roof truss supplied or designed by your chosen supplier.

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. A truss with the same pitch and heel on both sides and a peak at the center is called a common truss. 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.

Standard framing details for use in preliminary design. This online truss calculator will determine the all in cost of your truss based on key inputs related to the pitch width and overhang of your roof. While this can be true it is not always accurate unless in some high stress situations. Most are spaced between 18 26 inches apart.

Common or standard trusses are symmetrical and have standard four inch heels. 600 timber thickness mm. To determine how many trusses to create you will first need to measure both the width and the length of the structure you are building. There is a misconception that spacing trusses every 16 on center is better because it will be strong than the average 2.

This length can easily be changed to fit the need of the truss. A wide variety of standard roof truss sizes options are available to you such as standard processing service and application. Roof truss span tables. 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.

About 1 of these are truss display. The trusses should be a little longer than the exact width to allow for overhang and you will need sufficient trusses to mount across the length. Almost all residential trusses use this spacing.