What are roof trusses?
Roof trusses are the main load-bearing element of the roof structure. Their primary function is to transfer the load between the roof and the building walls. Practically every building with at least a gable roof requires the use of either a roof framework or roof trusses.
The main structural components of trusses are the upper chord, lower chord, as well as vertical and diagonal web members. This type of structure does not require any intermediate support inside the building, which allows for an open interior space (without roof-supporting columns), enabling free design and arrangement of rooms.
When is it worth using roof trusses?
The use of roof trusses also allows for cost and construction time reduction, as the bottom chord of the trusses serves as the ceiling structure for the building’s ground floor. This solution enables simultaneous construction of both the roof and the ceiling structure. In the case of traditional roof frameworks, the ceiling is made as a reinforced concrete or prefabricated system, which extends the construction time and increases costs.
Prefabricated roof trusses are more economical, easier and faster to install, and they are effective in complex roof layouts. Trusses require about 35% less material than traditional frameworks for the same area. The installation of roof trusses takes one day for simple gable roofs, and up to three days for more complex structures.
For what type of buildings are roof trusses suitable?
Roof trusses are most commonly used in the construction of single-family homes – both masonry and wooden frame structures. Prefabricated trusses are also used in large-volume buildings, which eliminates the need for unnecessary support points in large spans. Trusses are ideal in situations where minimizing construction time is essential.
Example projects of prefabricated roof trusses
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