An engineered roof truss or trussed rafters that arrive on the back of a lorry are probably the most common type of roof structure for many new houses and commercial buildings today.

A rafter is a structural type of beam, which supports the roof of a building.

Trussed rafters are individually designed components made from kiln-dried, strength-graded timber joined together with steel nailplates. They provide a structural framework to support the roof fabric, ceilings.
Trussed rafters are a highly-engineered product, They are seen as more cost effective than some other methods of roof construction.

Benefits of Trussed Rafters
Suitable for a wide range of roof structures and building types
Speed of construction allows just-in-time delivery to site
Prefabricated components can mean reduced labour costs
Made of timber, a renewable building resource