Timber Roof Trusses

 A timber roof truss, also known as shingle truss, is a vertical structural frame of timbers primarily used to support a roof and to bridge the open space above a building. Trusses generally occur at periodic intervals, connected by long horizontal timbers like purlins, at right angles to each other. The open space between the timbers is called a bay. Bay roofs are common in North America and are becoming more popular in Europe, particularly where open space is at a premium.

These roofs have many advantages over conventional roofs, such as thermal insulation, noise insulation, and reduced energy bills. However, in some regions, like the USA, timber roof trusses can be more expensive than conventional roofs. Timber roofs are relatively simple to install and require very little maintenance. In the right location, they can also look very attractive.

There are two types of timber trusses - straight and sloping. Straight timber trusses are constructed by crossing the bottom half of a chord with the top half, and joining them at the joint. On the other hand, sloping roof trusses are constructed by setting up parallel timbers across the top of the chord, while allowing some gap at the bottom to be left free. The horizontal distance between the timbers that make up a chord is called the rafters.

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