Residential Roof Load On Walls Below

However there are cases where a bearing wall is parallel to the joists.

Residential roof load on walls below. Engineered roof truss systems may be designed to eliminate the need for load bearing walls or change where the bearing walls are located. But if the wall runs perpendicular at a 90 degree angle to the joists there is a good chance that it is load bearing. The architectural graphic standards lists the weight of an exterior 2 6 wall as 16 pounds per ft 2. Load limits on the roof of a building.

Generally when the wall in question runs parallel to the floor joists above it is not a load bearing wall. If there is chances are the walls are load bearing. Roofs are under a lot of pressure. Chapter 3 design loads for residential buildings typical load combinations used for the design of table 3 1 components and systems1 component or system foundation wall gravity and soil lateral loads headers girders joists interior load bearing walls and columns footings gravity loads exterior load bearing walls and.

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. Loads are contributed to the lower header by the roof upper walls and 2nd floor system. In order to stay intact and in place a roof must be able to resist loads both permanent and temporary that are pushing.