Timber Roof Framing Terminology

A horizontal timber or metal resting at the peak of the roof the rafters and trusses are connected to the ridge board for a cohesive framework.

Timber roof framing terminology.

A composite decking made of solid materials it resembles real wood and particularly strong and stable for bearing heavy load. The primary horizontal support timbers in a timber frame. A bearing timber spanning an area to which a ceiling is fixed to the underside only. A 45 degree flat edge planed or routed along the outer or leading edges of a timber.

Some of these can support the roof and prevent ridge sagging and wall spreading. The mortise is the notching into a. Wood used in. Each bent forms an end wall in a bay.

The primary vertical timbers in a timber frame. The following glossary assumes that longitudinal is the direction in the ground plan which runs parallel to the ridge while transversal is the direction parallel to the gables or orthogonal to the ridge. An axe like tool with its blade at right angles to its handle used to shape or dress timbers. In the following section we ll cover some of the more common roof and rafter terms you ll need.

Horizontal timbers used to support floors and ceilings. A bearing timber forming part of a suspended timber floor to which the floor boards are nailed to the top and a ceiling may be attached beneath or 2 ceiling joist. Framing terms knowing the basic vocabulary is a necessary part of your work as a builder. What was once a pole or timber is now a milled board typically a 1 by 6 or larger for houses hence today s use of the term ridge board.

Timber framing can be confusing if you re unfamiliar with the terminology used. Below is a list of terms related to the timber frame industry. Series of timbers that are used to support roofs. What s the difference between a bent and bay system and a post and beam system.

The simplest form of pitched roof consisting of rafters inclined at 30º. Roof framing terms are related to the parts of a triangle. Like individual slices in a bread loaf bents extend completely through. In the 17th and 18th centuries ridge piece and ridge pole were used respectively to designate a horizontal timber or a pole at the ridge of a roof.

Terminology timber framing page 1 terminology timber framing roof structures note. Key timber frame terminology. Terminology timber framing system terminology. Collar ties rafter ties tension beams structural ridge beams.

The most commonly used joinery in timber framing systems. A diagonal piece of timber used to support beams. Roof features associated with basic roof framing terms are shown in figure 2 2.