Truss Roof Load Bearing Walls

Load bearing interior wall under truss roof.

Truss roof load bearing walls.

Based on knowing it is a truss system the span which the trusses cover and the fact that as shown in the photo there is no header for about an 8 wide section of the opening into the dining room do you think the wall blocking the view of the kitchen could be removed without any concerns about it being load bearing. 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. I ve never seen a 30 truss that needed intermediate bearing but i can t say that it has never happened.

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. You will need an engineer involved in this since many contractors will tell you anything to get the job. 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.

If one of the truss webs doesn t come down on the wall then it s not load bearing. Engineered roof truss systems may be designed to eliminate the need for load bearing walls or change where the bearing walls are located.