Roof Truss Spacing Pole Barn

For example you might use a 35 spreader bar on a 70 span truss.

Roof truss spacing pole barn.

Many post frame or pole barn construction use 8 foot spacing between trusses. Attic trusses are great for living space or storage space. Pole barn construction spaces the trusses 8 feet apart or even up to 12 feet apart depending on the building design. Pole barn builders have historically requested trusses every 4.

Especially when steel roof truss spacing is concerned some engineers would argue that it is possible to only have a roof truss spacing of four feet off center even eight feet has been suggested. These pole barn trusses are much harder to set in place and the greater spacing can displace the load causing the trusses to fail. 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. Truss design programs safely design up to 16 span.

Typically larger trusses 72 and 80 were two ply. They are easily damaged when laying on their side. They are spaced every four feet. Truss spacing for metal roof.

Of course local building codes and regulations may also determine how many trusses and the spacing necessary for each post frame structure. Pole barn truss spacing. The more ply or layered material the stronger the truss. 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.

Roof trusses are engineered to be strong in plane with the roofing on the top chord. At the time pole barn builders were unable to hang or lift the trusses without any bending bowing. With traditional stick frame construction the trusses are usually spaced 2 feet apart. Typically pole barn style buildings in my area have bays distance between trusses of 5 feet to 12 depending on pitch insulation and height.

It all comes down to engineering. Large span trusses require multiple pickup points using a spreader bar on the crane. Beware of kits that space their pole barn trusses more than 4 on center. Post frame roofs in severe weather conditions.

One sign of a cheaply made pole barn is trusses that are spaced over 4 on center. Trusses 2 o c trusses can also be set 4 o c for steeper roof pitch appeal but eliminating attic storage and flooring building 1 and building 2 building 3 for similar attic area pics. In the 1980s post frame construction companies commonly used 60 single ply trusses.