Roof And Truss Design

The design of a roof truss is crucial in ensuring the longevity of a home.

Roof and truss design.

Aside from personal preference the style of the truss must be designed to properly support the roof of the home. Roof truss design 1 24 span 2 web with plywood gussets figure 1. A mansard roof has a few other determining characteristics. The primary disadvantage of roof trusses is that the attic space is not easily usable for storage or potential living space.

In addition side and end wall height and type roof shape and bracing requirements must be considered. Architectural style types of roofing material methods of support of column framing and relative economy are the principal factors influencing a choice among the three basic types of trusses. The standard roof truss spacing is 2. This is the distance between trusses.

The shape of the roof span of the truss and loads play a significant role in choosing the type of roof truss to be used. To do it correctly a stable design model must be created. The steeper the roof the more expensive the trusses get because the longer the boards get and the more roof area increases. As well running an attic air duct system can be very difficult if the roof trusses were not designed for that application.

For example they have the tendency to have dormers or windows that project out from the roof. You will also incur additional costs because it is much harder to deck and shingle a roof that is 12 12 pitch versus a 4 12 roof. The roof truss system is one of the most crucial parts to home construction.