Traditional Roof Construction Timbers

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.

Traditional roof construction timbers.

One pitched roof construction method is a cut roof method. 7 simple traditional roofs. It is commonplace in wooden buildings through the 19th century. There are also a number of other framed constructions such as portal frame roofs.

This can be determined by the size of the timbers or the size of the roof. 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. The alternative construction is the traditional cold deck. This is more of a traditional manner in regards to cutting the timber while onsite and building up the roof by the use of rafters ridge boards joists and purlins among others.

The traditional option is steeply pitched rarely less than 35. Rafters have a tendency to flatten under gravity thrusting outwards on the walls. This places the rafters joists inside the thermal envelope of the building and means that no special ventilation measures need to be taken to maintain the roof timbers. Roof building is one of the more complex aspects of site carpentry and is a highly skilled job as the timbers are cut on site and erected one at a time it is both relatively slow and relatively expensive.

If the structural frame of load bearing timber is left exposed on the exterior of the building it may be. There are two basic methods of pitched roof construction. They span from the wallplate to the ridge board providing a platform for the underlay battens and tiles. 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.

Traditional or cut roof. Traditional or cut roofs usually comprise a series of sloping timbers rafters fixed to a wall plate at their feet and a ridge board or possibly a wall plate at their head. Prefabricated trusses which are delivered to site and erected. Here insulation is usually placed between the roof joists i e.

The rafters are the main load bearing elements of the roof. 9 complex purlin roofs. 11 some examples of older traditional roofs. 10 complex new roofs.

The overall construction of a traditional cut roof is to ensure that the load of the roof is evenly transmitted to the walls below. The two basic construction methods of pitched roofs are. Get this revit file here. Laid across roof beams.

8 simple purlin roofs.