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Compass rafter: A rafter curved or bowed on the top (the top surface of a rafter is called its "back") or both the top and bottom surfaces. Curb rafter: The upper rafters in a curb (kerb, gambrel, Mansard roof) roof. Hip rafter (angle rafter): The rafter in the corners of a hip roof. The foot of a hip rafter lands on a dragon beam.
The truss roof of the 4th-century church Old St. Peter's Basilica, Rome. The triangular frame of beams of the main nave is largely self-supporting, as the forces are carried along the beams rather than acting vertically on them. The list of ancient roofs comprises roof constructions from Greek and Roman architecture, ordered by clear span.
In this example the lookouts are covered when the soffit is finished, as can be seen on the right hand side of the image. A lookout , [ 1 ] lookout rafter or roof outlooker [ 2 ] is a wooden joist that extends in cantilever out from the exterior wall (or wall plate) of a building, supporting the roof sheathing and providing a nailing surface ...
Pyramid roof: A steep hip roof on a square building. Pyatthat: A multi-tiered and spired roof commonly found in Burmese royal and Buddhist architecture. Tented: A type of polygonal hipped roof with steeply pitched slopes rising to a peak; Helm roof, Rhenish helm: A pyramidal roof with gable ends; often found on church towers.
Two king post trusses linked to support a roof. Key:1: ridge beam, 2: purlins, 3: common rafters. This is an example of a "double roof" with principal rafters and common rafters. 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.
The Tomlinson Lumber Co sold pre-cut materials for a 34 by 50 feet (10 m × 15 m) dairy barn with a Gothic-arched roof supported by three-ply rafters in 1958 throughout Minnesota. [ 10 ] The first published plans by an architect for a Gothic-arch barn appeared in 1916.
A view of a roof using common purlin framing. The purlins are marked in red. This view is from the inside of the building, below the roof. The rafters are the beams of wood angled upward from the ground. They meet at the top of the gable at a ridge beam, which has extra bracing to attach it to the rafters.
A roof being framed in the United States circa 1955. Modern timber roofs are mostly framed with pairs of common rafters or prefabricated wooden trusses fastened together with truss connector plates. Timber framed and historic buildings may be framed with principal rafters or timber roof trusses.