Roof Truss Spacing Pole Barn

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.

Roof truss spacing pole barn.

Attic trusses are great for living space or storage space. Roof trusses are engineered to be strong in plane with the roofing on the top chord. Large span trusses require multiple pickup points using a spreader bar on the crane. Of course local building codes and regulations may also determine how many trusses and the spacing necessary for each post frame structure.

Each do it yourself pole barn kit sold by diy pole barns includes wood pole barn trusses ranging anywhere from 12 feet to 40 feet wide depending on the structure. At the time pole barn builders were unable to hang or lift the trusses without any bending bowing. 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. One sign of a cheaply made pole barn is trusses that are spaced over 4 on center.

It all comes down to engineering. In the 1980s post frame construction companies commonly used 60 single ply trusses. The more ply or layered material the stronger the truss. Typically larger trusses 72 and 80 were two ply.

Code requirements do not dictate this. They are easily damaged when laying on their side. Truss design programs safely design up to 16 span. They are spaced every four feet.

Post frame roofs in severe weather conditions. Pole barn truss spacing. Many post frame or pole barn construction use 8 foot spacing between trusses. Typically pole barn style buildings in my area have bays distance between trusses of 5 feet to 12 depending on pitch insulation and height.

These pole barn trusses are much harder to set in place and the greater spacing can displace the load causing the trusses to fail. Pole barn roof truss spacing generally tens to operate according to similar spacing principles though there are some proponents of having higher pole barn roof truss spacing. For example you might use a 35 spreader bar on a 70 span truss. With traditional stick frame construction the trusses are usually spaced 2 feet apart.

Beware of kits that space their pole barn trusses more than 4 on center. 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. Truss spacing for metal roof.