Horizontal Shearing Of A Roof Trust

To provide horizontal stability.

Horizontal shearing of a roof trust.

This article focuses on typical single storey industrial buildings where trusses are widely used to serve two main functions. It is often used in simple roof trusses such as in the shed porch and garage. Pitch slope the pitch or slope is the incline of the roof expressed as a fraction describing the rise over the run. For example a slope of 6 12 means for every 12 inches of horizontal distance the slope of the roof will rise 6 inches vertically.

To carry the roof load. Rafters have a tendency to flatten under gravity thrusting outwards on the walls. A timber roof truss is a structural framework of timbers designed to bridge the space above a room and to provide support for a roof trusses usually occur at regular intervals linked by longitudinal timbers such as purlins the space between each truss is known as a bay. The rise will be the elevation change over the 12 inches.

Properly designed drag strut trusses shear walls or roof diaphragms and their connections will transfer lateral loads to the foundation and then safely into the ground. Typically they are lapped and then toe nailed together in its center so that the correct length can be achieved. Trusses are also used to carry heavy loads and are sometimes used as transfer structures. A sagging roof line may original from the ceiling s horizontal rafters.

The king post roof truss is the simplest of the trusses because of its simple composition.