Truss Roof No Load Bearing Walls

To enable the roof truss to deflect under loads nails to the truss must be installed at the top of the slotted holes and not hammered home to allow a loose fit only.

Truss roof no load bearing walls.

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. To prevent these problems the gap between the truss and the non bearing wall should be enough so that it does not close when the load is applied to the truss. Technically the interior partition walls shouldn t even be touching the truss bottom cord during rough in but they usually are. Trusses unless a special girder truss which accepts the loads of attached trusses have no interior load bearing walls.

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. So you could have a minor gap with no load at the end of construction but during snow load you could have a truss failure.