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Ridge-post framing is an old type of timber framing. The ridge board of their roof is not carried by king posts based on tie beams, but the ridge posts are based on the ground work. The German term for this construction is Firstständerhaus .
Joiners did the finer work of installing trim and paneling. Plank and board are not consistently defined in history. Sometimes these terms are used synonymously. Board means a piece of lumber (timber) 1 ⁄ 2 inch (1.3 cm) to 1.5 inches (3.8 cm) thick and more than 4 inches (10 cm) wide.
A birds-mouth joint in a rafter, set upon a double top plate. Shown are the two cuts of the joint: the seat cut and the heel cut. In light frame construction, a birdsmouth joint or bird's beak cut is a woodworking joint that is generally used to connect a roof rafter to the top plate of a supporting wall. [1]
The top ends of the rafters often meet at a ridge beam, but may butt directly to another rafter to form a pair of rafters called a couple. Depending on the roof covering material, either horizontal laths , battens , or purlins are fixed to the rafters; or boards, plywood , or oriented strand board form the roof deck (also called the sheeting or ...
The trim and rafters at this edge are called rakes, rake board, rake fascia, verge-boards, barge-boards or verge-or barge-rafters. [3] It is a sloped timber on the outside facing edge of a roof running between the ridge and the eave. [4] On a typical house, any gable will have two rakes, one on each sloped side.
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.
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 scarf joint may also be used to fix problems caused when a board is cut too short for the application. The board can be cut in half with a tapered cut yielding a scarf joint. When the joint is glued together, the tapers are slid against each other so that the two sections are no longer in line with each other.