Traditional Timber Roof Structures

This reflects the weatherproofing requirements of older roofing materials like thatch and peg tiles.

Traditional timber roof structures.

A timber roof truss is a structural framework of timbers designed to bridge the space above a room and to provide support for a roof trusses usually occur at regular intervals linked by longitudinal timbers such as purlins the space between each truss is known as a bay. A cut roof this is the traditional method of cutting the timber on site and building up the roof using rafters ridge boards joists and purlins etc the exact details being determined by the size of roof size of timbers etc. Design of timber structures part 1 2 general structural fire design. A truss roof using factory made trusses which are delivered to site complete and just erected.

Not only is the volume large enough to convert into living space but the structure can generally be easily. Rafters have a tendency to flatten under gravity thrusting outwards on the walls. In larger roofs lateral restraint typically in the form of collars spanning between the rafters prevents the structure from spreading outwards. The finished structure is readily adaptable.

Traditional cut timber pitched roof structures were in common use up until the 1970s. The rafters distribute the load of the roof covering and structure to the external walls. If the structural frame of load bearing timber is left exposed on the exterior of the building it may be. Trada have published span tables in a new softback book called eurocode 5 span tables.

It is commonplace in wooden buildings through the 19th century. The traditional option is steeply pitched rarely less than 35. Timber framing and post and beam construction are traditional methods of building with heavy timbers creating structures using squared off and carefully fitted and joined timbers with joints secured by large wooden pegs.