Truss Roof Load Bearing Walls

I ve never seen a 30 truss that needed intermediate bearing but i can t say that it has never happened.

Truss roof load bearing walls.

The roof trusses are too long to span the whole house so the load bearing wall runs down the center of the house to support the trusses at the perpendicular intersection in the middle. You will need an engineer involved in this since many contractors will tell you anything to get the job. Engineered roof truss systems may be designed to eliminate the need for load bearing walls or change where the bearing walls are located. Interior walls might be load bearing or may not be.

With your trusses spanning the exterior walls for the full run of the house no interior walls will be load bearing the splices on trusses are engineered to be self supportive according to the plate sizing the fact that they land over an interior wall has nothing to do with that wall being load bearing trusses are engineered to span exterior wall to exterior wall self supporting. It most likely is a load bearing wall even without the hvac unit taken in consideration. If one of the truss webs doesn t come down on the wall then it s not load bearing. If there is a column that supports the truss found in the wall the wall still would not be load bearing because the column is taking the load.

Truss roofs are typically designed to use some interior walls as mid span support to save on costs associated with making the truss larger stronger. For example a gable end truss may be designed with support members that transmit the roof weight load outward to the side walls allowing the end wall directly below it to have breaks or openings in it that would otherwise be impossible.