Some builders outsource the construction of their trusses and have them delivered on-site. At FBi, we build our trusses in-house, which allows us to monitor construction costs. This section will vary from different post frame builders. The truss profile, span, heel height, overhang, and web configuration depend on the building design and will vary by application. They’re responsible for handling and transferring all stresses from the roof (via purlins and steel) to the columns. In addition to supporting the roof and connected building sides, trusses are a critical part of the load path. Remember, a truss is a web-like structure composed of various wood components connected with a metal plate. Check out some of our commercial buildings to see what we’re talking about.īecause of how trusses are constructed, you have less potential deflection or bending than rafters. They’re also extremely flexible in design. Because of the trusses, post frame buildings can have large interior spaces. On the flip side, the beauty of a pole barn is how it’s constructed. This is not as easy with rafters because of less support with the bottom chords. FBi’s trusses are engineered, so we would make sure that the number of splices would not interfere with the integrity of your building. With trusses, you can splice the members in a truss design. However, lumber only comes in 20’ increments. They’re often used on unfinished porches, lean-tos, or horse barns. They’re constructed with only one framing member (meaning no bottom chord or webbing). The “truss” portion of the building would be your aisle way, and the “rafter” would be at the top of the structure.Īs previously stated, rafters can be single or double-ply. If you choose to go this route (and choose FBi as your builder), we will incorporate a rafter-truss combo for your building. Remember when we said that rafters need additional interior support? The stalls inside your building help make up that extra support. Rafters can also be used for horse barns. They’re also ideal for smaller, DIY pole barn kits. Rafters are a convenient option if you’re looking at building a smaller project that doesn’t require a wide span. But, of course, the construction of your roof support is at the top of that list. We consistently cover the importance of high-quality materials and how structural integrity plays a role in the longevity of your post frame building. If you’re undecided about what roof system to use (wood trusses, roof trusses, steel trusses, etc), these six key areas listed below will provide you with more information for your construction project. If you’re an avid follower of FBi Buildings, we’ve even written a blog over 6 Key Points to Look For in a Quality Post Frame Builder. You might even have it narrowed down to your top two favorite builders. ![]() If you’re contemplating building a new pole barn, you’ve more than likely have done your research on post frame builders in your area. What Are the Differences Between Rafters and Trusses? ![]() This doesn’t mean that rafters aren’t a viable option, but rafters will affect the overall layout of your building. Now that you have a basic understanding of rafters and trusses let’s discuss why trusses are primarily used for post frame construction. The actual truss profile, spacing, span, heel height, pitch, overhang, and web configuration are dependent on the specific design conditions and will vary by application. Trusses are comprised of a top chord, a bottom chord, and webs connected at the joints with plates. A truss is the rigid framework of wooden members designed to support a roof.
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