Roof Truss Design Example

The aim of this post is to show the design example of a timber roof truss trussed rafter.

Roof truss design example.

For example 4 12 pitch means 4 inches of rise in 12 inches of run. As a direct product of nature timber has so many variable properties that are more complex than that of concrete steel bricks or aluminium. Currently prefabricated roof trusses have replaced the skill of roof carpentry. The steeper the roof the more expensive the trusses get because the longer the boards get and the more.

The skeletal structure of a roof system 18 0m long and 7 2m wide is as shown in figure below. Detailed design of trusses 5 7 figure 1 7 n truss also with n truss purlins 1 4 aspects of truss design for roof structure 1 4 1 truss or i beam for the same steel weight it is possible to get better performance in terms of resistance and stiffness with a truss than an i beam. Now the trusses are just lifted and craned quite easily and quickly. Ce 331 fall 2010 example.

To illustrate this a simple design example has been presented. Roof truss analysis 1 6 in this example a parallel chord steel roof truss is analyzed for typical dead and roof live loads. The vertical rise of the top chord per 12 horizontal inches is the roof pitch or slope. Trusses can be customized according to the requirement and thus serve as a simplified way of roofing.

The photo below shows a truss girder painted gray supporting the roof of a gymnasium. The use of timber as trussed rafters for roof of buildings is a very popular alternative all over the world. The truss is made up of howe truss configuration spaced at 3m intervals.