Parts Of A Timber Roof Frame

The rafters and trusses are connected to the ridge board for a cohesive framework.

Parts of a timber roof frame.

Key timber frame terminology. The space between each truss is known as a bay. Trusses usually occur at regular intervals linked by longitudinal timbers such as purlins. Ridge beams are long rectangular rigid pieces of wood metal or stone which are placed horizontally along the ridge of the roof.

They provide the support for the external roofing material. Pairs of opposing rafters were thus initially tied together by a horizontal tie. The rafters are not framed into the plate but are simply nailed to it. Rafters are sloped beams that run from the roof s ridge to the eaves.

Rafters have a tendency to flatten under gravity thrusting outwards on the walls. It resembles real wood and particularly strong and stable for bearing heavy load. The wall and the roof. The king post roof truss is the simplest of the trusses because of its simple composition.

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. 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. Roof sheathing material is usually plywood or oriented strand board osb that is just under half an inch.

The point at which all the raftersare attached to. It is often used in simple roof trusses such as in the shed porch and garage. Like individual slices in a bread loaf bents extend completely through. Tie down fixings tie down fixings are used to resist uplift and shear forces lateral loads in floor framing wall framing and roof framing.

A horizontal timber or metal resting at the peak of the roof. A 45 degree flat edge planed or routed along the outer or leading edges of a timber. Wood used in. Transfers the loadof the roof through the raftersto walls below.

Parts of a roof a ridge board is a horizontal member of the roof frame. The structural relationship between the rafters and the wall is the same in all types of roofs. 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. For larger spans and thinner walls this can topple the walls.

Each bent forms an end wall in a bay. The entire roof frame is covered in a thin piece of wood called decking or roof sheathing.