Horizontal Shearing Of A Roof Trust

Trusses are also used to carry heavy loads and are sometimes used as transfer structures.

Horizontal shearing of a roof trust. The king post roof truss is the simplest of the trusses because of its simple composition. 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. This article focuses on typical single storey industrial buildings where trusses are widely used to serve two main functions. A sagging roof line may original from the ceiling s horizontal rafters.

The run or the base number is 12 inches. To provide horizontal stability. 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.

The rise will be the elevation change over the 12 inches. Rafters have a tendency to flatten under gravity thrusting outwards on the walls. It is often used in simple roof trusses such as in the shed porch and garage. When the framing of the roof is put together quite frequently two of the ceiling rafters will be fixed together as this will create a much longer span.

Typically they are lapped and then toe nailed together in its center so that the correct length can be achieved.