Parts Of A Timber Roof Frame

The main structural parts of a roof are ceiling joists ridge board jack rafter hip rafter common rafters creeper rafters raking plates out riggers and noggings or last rafter overhang.

Parts of a timber roof frame.

Each bent forms an end wall in a bay. Ridge beams are long rectangular rigid pieces of wood metal or stone which are placed horizontally along the ridge of the roof. Parts of a roof a ridge board is a horizontal member of the roof frame. The rafters and trusses are connected to the ridge board for a cohesive framework.

Decking is supported by the roof frame and the layers of a roof which we cover below and all rest on top of the decking. The point at which all the raftersare attached to. The rafters are not framed into the plate but are simply nailed to it. Trusses usually occur at regular intervals linked by longitudinal timbers such as purlins.

Key timber frame terminology. 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 rafters are really functional parts of both the walls and the roof. Rafters have a tendency to flatten under gravity thrusting outwards on the walls.

The entire roof frame is covered in a thin piece of wood called decking or roof sheathing. Wood used in. Like individual slices in a bread loaf bents extend completely through. Roof sheathing material is usually plywood or oriented strand board osb that is just under half an inch.

Tie down fixings tie down fixings are used to resist uplift and shear forces lateral loads in floor framing wall framing and roof framing. In a nutshell it s made up of a central vertical post called the king post two rafters meeting at the apex and a tie beam or the horizontal base. The wall and the roof. It resembles real wood and particularly strong and stable for bearing heavy load.

A composite decking made of solid materials. Pairs of opposing rafters were thus initially tied together by a horizontal tie. A horizontal timber or metal resting at the peak of the roof. They provide the support for the external roofing material.

A 45 degree flat edge planed or routed along the outer or leading edges of a timber. The king post roof truss is the simplest of the trusses because of its simple composition. Some are cut to fit the plate whereas others in hasty. Transfers the loadof the roof through the raftersto walls below.

It is often used in simple roof trusses such as in the shed porch and garage. The space between each truss is known as a bay.