For a rafter framing structure to be strong and resilient, it should be based on solid timber roof trusses. The task of the truss is to transfer loads to the walls or columns. Depending on the span on which the structure is to be placed, the most common types of carpentry trusses are:
queen post truss – the most complex type of truss, which is used for spans of 8 m and above. It involves posts called stools, on which are placed transverse roof ties that connect the rafters. Above the roof ties mounted are binding rafters arranged along the roof structure to serve as supports for the rafters.