moisture resistance (however, it must be properly prepared beforehand) – this prevents the appearance of mould or fungi,.steel roof trusses can be lighter than wooden rafter framing,.properties of steel – it does not require drying out or maintenance,.it is easy and quick to erect – compared to timber framing, its installation is less labour-intensive and does not require a large number of workers,.The steel roofing structure is delivered to the construction site semi-finished and then put together. Companies that manufacture and sell steel roof trusses usually also offer its installation. However, it is prepared according to the delivered design, taking into account specified dimensions. The steel roof truss is usually purchased as a finished product. Steel roofing is also used for large-area buildings, such as warehouses and supermarkets.

In these cases, a lightweight steel roof structure is used, as it puts a minor load on the walls and ceilings.

The steel roof truss is also used in roof rebuilding – particularly when a flat roof is converted into a pitched roof. So when is it used? Steel roof structures are primarily used in buildings and houses which walls are also based on a steel frame. We look at the use, advantages and disadvantages of a steel roof structure.Īs mentioned in the introduction, the steel roof truss is becoming increasingly popular. However, steel is an increasingly popular material for rafter framing. It is not only a traditional material but still the most commonly used. Traditionally, the roof structure – rafter framing – is made out of timber.

A key element of every roof, but also the entire building, is the rafter framing.

Rafter spacing for metal roof