Timber Roof Framing Terminology

A bearing timber spanning an area to which a ceiling is fixed to the underside only.

Timber roof framing terminology.

Key timber frame terminology. 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. The simplest form of pitched roof consisting of rafters inclined at 30º. Timber framing can be confusing if you re unfamiliar with the terminology used.

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. What s the difference between a bent and bay system and a post and beam system. Roof framing terms are related to the parts of a triangle. Horizontal timbers used to support floors and ceilings.

It is a waterproofing layer made of regular felt stacked above the solid. Common timber frame terms adze. 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. In the following section we ll cover some of the more common roof and rafter terms you ll need.

A 45 degree flat edge planed or routed along the outer or leading edges of a timber. Collar ties rafter ties tension beams structural ridge beams. A composite decking made of solid materials it resembles real wood and particularly strong and stable for bearing heavy load. The most commonly used joinery in timber framing systems.

Terminology timber framing system terminology. Some of these can support the roof and prevent ridge sagging and wall spreading. A diagonal piece of timber used to support beams. The mortise is the notching into a.

This article describes and illustrates the different types of support that prevents roof sagging and wall bulging at buildings including definitions of collar ties rafter ties and structural ridge beams. 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. Each bent forms an end wall in a bay. Terminology timber framing page 1 terminology timber framing roof structures note.

The primary vertical timbers in a timber frame. The primary horizontal support timbers in a timber frame. Roof features associated with basic roof framing terms are shown in figure 2 2. Framing terms knowing the basic vocabulary is a necessary part of your work as a builder.

An axe like tool with its blade at right angles to its handle used to shape or dress timbers. 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. Wood used in.