How Far Apart Should Roof Trusses Be Spaced

Common spacing for trusses on this type of building is often between 2 and 4 feet but trusses built with advanced designs may allow spacing as great as 8 or 12 feet.

How far apart should roof trusses be spaced.

For many traditional stick frame builders trusses spaced 8 feet apart seems unnatural but thanks to the ingenuity of modern engineering it is a very common building design. With traditional stick frame construction the trusses are usually spaced 2 feet apart. A roof truss is a structural framework usually made from wood that bridges the space between the ceiling of the top level and the roof structure. Typically pole barn style buildings in my area have bays distance between trusses of 5 feet to 12 depending on pitch insulation and height.

The same concept holds true for 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. 2 4 rafters can span up to 7. These are typically spaced at certain intervals to provide the necessary support for the roof.

Spacing your 2 4 shed rafters at 24 on center limits the width of your roof. Once you ve calculated the number of trusses you will need you should purchase the lumber. If purlins are laying flat on top of the truss 5 or 6 feet is the max on 2x4 s edge up can go to 12 feet or more. For heavy loads 2x4s can span up to 5.

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. Truss spacing for metal roof. These standards are as follows. It all comes down to engineering.

Their defense is our engineers will not allow us to. A 10 8 6 and 4 spacing between trusses has been the standard for most types of construction for years. With this design change roof trusses could be placed 12 feet apart making it possible for roofs to support the loads to which they would be subjected. For light load roofs 24 o c.

Typical roof truss spacing means that they are usually about 24 inches from centre which means at the centre of one truss there will be a two foot gap or twenty four inch gap until the centre of the next truss. Most roof framing is 24 on center and you can still build sheds up to 14 with 2 4 rafters at 24 on center. I ve had roof truss manufacturers try to convince me it is impossible to place wood trusses at spacings of over every 4 feet. Most economical when the difference in slope between the top and bottom chords is at least 3 12 or the bottom chord pitch is no more than half the top chord pitch.