Roof Wall Diaphragm

Shear diaphragms are essentially planar structural systems found in roofs floors and walls of buildings.

Roof wall diaphragm.

A shear wall however is a vertical cantilevered diaphragm. A composite decking made of solid materials it resembles real wood and particularly strong and stable for bearing heavy load. It is a waterproofing layer made of regular felt stacked above the solid. Therefore area is for 1 2x4.

At the roof level these wall reactions turn the load in the roof system in the plane of the roof. Diaphragm action is an additional capacity of the panel to transfer the lateral loads to the outside edges of the panel to the eave for roof panels and to the ground for wall panels. Diaphragms are typically horizontal but can be sloped such as in a gable roof on a wood structure or concrete ramp in a parking garage. The diaphragm resists the in plane loads by acting as a large horizontal beam spanning between the supporting end walls that are known as shear walls.

The term diaphragm is usually applied to roofs and floors. This stiffness provides stability and replaces the need for other bracing elements. This horizontal element is known as the diaphragm. A shear wall however is a vertical cantilevered diaphragm.

A diaphragm structure results when a series of such vertical and horizontal diaphragms are properly tied together to form a structural unit. Chords are usually the double top plates of the walls but for simple but jointed members only 1 member is acting at the joint. The term diaphragm is usually applied to roofs and floors. Roof diaphragm chord for the diaphragm the chords carry the moment couple and the panels carry the web shear tension generally controls.

In structural engineering a diaphragm is a structural element that transmits lateral loads to the vertical resisting elements of a structure such as shear walls or frames. A diaphragm is a flat structural unit acting like a deep thin beam. These construction systems can be used when designing a building for lateral loads such as those generated by wind or earthquakes. A horizontal timber or metal resting at the peak of the roof the rafters and trusses are connected to the ridge board for a cohesive framework.

They are comprised of interconnected units attached to supporting members such that the entire assembly possesses both in plane shear strength and stiffness.