Truss Roof Load Bearing Wall

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.

Truss roof load bearing wall.

Joists are rarely continuous over the top of a wall instead they are often spliced over the top of the wall as dimensional lumber only available in specific lengths. 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. 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. Engineered roof truss systems may be designed to eliminate the need for load bearing walls or change where the bearing walls are located.

Having said that i d still just put a dbl 2x10 w ply flitch header in call it a day. An example of a load bearing wall call be seen on the right. If there is a truss over the wall the wall is probably not load bearing since the truss bears the load. If truss was build as a one piece truss it shouldn t be center bearing.