Residential Roof Load On Walls Below

The roof sheathing supports gravity loads such as the roof live load snow load and vertical uplift loads.

Residential roof load on walls below. Roofs are under a lot of pressure. Simply look in the crawl space or basement to identify the presence of a mid point stem wall or piers crawl space or bearing wall under the wall above basement. For example if building is 24 x 24 and has trusses and the load on the roof will be for 30 lb snow load and a ceiling with no storage will total out like this. Also the roof sheathing working in conjunction with the roof framing must function as a diaphragm to transfer lateral loads to the building s shear walls.

Wall and partition dead loads average weight of house by area 01 conpal dewalt 7 8 05 3 50 pm page 30. Ft dead load of roof of wood shingle construction 10 lbs. Load bearing walls support the weight of a floor or roof structure above and are so named because they bear a load. 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.

Roof and ceiling construction shall be capable of accommodating all loads imposed according to load requirements and of transmitting the resulting loads to the supporting structural elements. Created by wind pressures. Bearing walls that are carrying a roof load must transfer that load to a footing. By contrast a non load bearing wall sometimes called a partition wall is responsible only for holding up itself.

In other words it is either going to be on an outside wall or somewhere on the inside. In order to stay intact and in place a roof must be able to resist loads both permanent and temporary that are pushing. Engineered roof truss systems may be designed to eliminate the need for load bearing walls or change where the bearing walls are located. Live load on attic.

The load on an outside wall with clear span trusses is exactly half the load on each wall. 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. Load limits on the roof of a building. Identifying if the wall is load bearing is an easy procedure.