The wooden roof truss is the most traditional and common roof structure. It can be built entirely by hand, but also from industrially prefabricated building elements. In addition to simple construction timber, wood-based materials with different properties are increasingly being used for production, which differ primarily in terms of durability and dimensional stability. Due to the constantly growing demands on thermal insulation, new support systems have been developed, such as the box girder or the web girder.
The load-bearing system of a purlin roof consists of horizontal purlins on which the inclined rafters rest. It is the most common roof structure, as a wide variety of roof shapes, roof pitches and floor plan shapes are possible.
Image: purlin roof - bauwion
Source: bauwion
