I am in the process of constructing a second story addition on a one story ranch house. The building has a brick exterior. The architect had designed a floor truss system 16" OC. The trusses will sit on plates that are fastened to the tops of the ceiling joists. The ceiling joist ends on the 2x4 exterior stud wall, meaning it does not extend over the brick. According to the design the trusses will also bear on the brick which means the exterior brick veneer will carry part of the load. In addition a 2x6 exterior wall will sit on the truss above the brick exterior wall. The brick however is lower and will be built up 16" with a knee wall. The question concerns window openings. Is a header necessary in the knee wall above window openings. Please see attachment.
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