Roof Wall Diaphram

This roof system comprises structural wood panel sheathing with light dimensional lumber supports resting on open web steel joists and joist girders.

Roof wall diaphram.

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. These construction systems can be used when designing a building for lateral loads such as those generated by wind or earthquakes. 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.

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. A diaphragm is a flat structural unit acting like a deep thin beam. The term diaphragm is usually applied to roofs and floors. This horizontal element is known as the diaphragm.

A shear wall however is a vertical cantilevered diaphragm. At the roof level these wall reactions turn the load in the roof system in the plane of the roof. The roof structure consists of a panelized hybrid roof system which is very common in large diaphragm roofs in the seismically active western united states.