D.I.Y Home Improvements

The truss is one invention from antiquity which is still very much in use today. To put it simply, a truss is a triangle, or a series of triangles used as a roof support in construction; the triangle being the strongest geometric shape. Trusses are also used extensively in the construction of bridges, skyscrapers and other large buildings such as aircraft hangers. The distinctive triangular framework of a trussed construction is evident on many modern skyscrapers, yet the use of a trussed construction is more evident on each and every pylon which stands in our landscape.

Timber framed buildings rely heavily on trusses for supporting the roof. It is also the distinctive truss which gives timber framed buildings much of their character. There are numerous examples of timber framed buildings throughout the UK which are still structurally sound after several hundred years, largely thanks to their ‘trussed’ construction but also thanks to their oak frames. Oak is the perfect timber for construction as once it has seasoned, it is quite literally as hard as a nails.

Other examples of the truss used in construction can be found on the Forth Rail Bridge; where the thee huge cantilevers are connected via trussed bridge sections. The distinctive construction of London Stansted Airport and 30 St Mary Axe (the gherkin) both use what is called a ‘lattice shell’ construction, which is quite literally a multitude of trusses. So the next time you’re looking for an example of trusses in construction, just look around you as they can be found almost everywhere.

By Dave Liver