Posted on: 8 September 2017Share
If you're experiencing problems with the trusses used in your home's construction, you may be wondering exactly what could have caused it. Before you call in a contractor or truss company to deal with it, it's helpful to at least have some idea of what you're dealing with. Here are a few common reasons for problems with wood trusses.
Web Member Modification
The web members placed in the center of the trusses serve as compression and tension for the structure, helping to balance the load of the roof. Once the trusses are in place, those web members must be left intact and unmodified. If someone decides to take a portion of the web member out to clear space for something or to gain more access in the attic, that's going to disrupt the balance created by the structure. This can actually weaken the trusses, because the web members provide key support.
Trusses and web members are precisely engineered for structural integrity. If you look in the attic and see that any of the web members have been disrupted at all, you'll need to work with a truss contractor to repair it, because it must be done to the proper specifications to support the roof.
Residual Roofing Damage
If your roof has suffered damage from a leak or the impact from a storm, there's the chance that the trusses beneath were damaged as well. If you look at the trusses and you see any damage in the top chord or you can see rotting at any point along the truss, it's going to need to be replaced. Some small damage can be repaired, but in most cases, the truss will need complete replacement to ensure structural integrity.
Any knots or other flaws in truss lumber are usually inspected closely before the truss is put in place. Unfortunately, even knots that appear structurally sound at the time of installation can pop loose later due to other factors. If you've noticed a hole or other problem in any truss, you'll want to have it assessed for structural weakening and other concerns.
Gusset Plate Problems
The gusset plates have to be in good condition to provide the necessary support for the truss. Inspect the gusset plates closely for any signs of corrosion or other damage. If any are loose or missing, that needs to be addressed quickly as well.
Insufficient Anchor Support
The anchor straps must be secured to the wall and the truss with at least three to four nails. If there are fewer than that, it may not have the strength and support that it needs. Have your truss contractor inspect the straps to be sure they are secure.
If you are having trouble inspecting your roof truss on your own, contact a truss contracting company in your area, such as Campbell Truss Company Inc.