Roof Framing Terminology

Top plate or plates in conventional western platform framing there are two top plates.

Roof framing terminology.

The inward angle of two sloping roof sections. Common types of roofs and basic framing terms. This is to help prevent deflection and sag in the roof. Sway bracing there are a few ways to sway brace the wall.

A composite decking made of solid materials it resembles real wood and particularly strong and stable for bearing heavy load. Types of roofs the most commonly used types of pitched roof construction are the gable the hip the intersecting and the shed or lean to. 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. However green building uses a single top plate and ensures that rafters and ceiling joists sit on the plate directly over the studs.

These are short spars that run from a hip to the eves or from a ridge to a valley. It is the form most commonly used by the navy. Roof framing involves a lexicon all its own. A building s frame is the skeleton that supports all of the finishing features like drywall doors windows and even your roof.

A term used to describe a pitched roof the ends of which are also sloped. It is a waterproofing layer made of regular felt stacked above the solid. For efficiency in both construction effort and material use timber frame structures are typically erected in boxlike sections called bays consisting of two bents one on each end along with additional frame members that connect the bents and form the structure. Roof structure definitions support choices for sloped roofs cantilevered roofs cathedral ceiling roofs.

Here is a closer look at common roofing terms. Cripple rafters or jack rafters between chimney and house eaves rafters that do not extend the full distance between house eaves and the roof ridge board see roof framing ties beams for a description of roof framing components including collar ties rafter ties structural ridge beams other roof framing components problems. Gable a gable roof has a ridge at the center and slopes in two directions. If you re trying your hand at constructing an outbuilding like a garage shed or pole barn you ll need to understand the basic components of wall framing before you get started.

It is simple in design economical to construct. 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. Key timber frame terminology. An example of each is shown in figure 2 1.

Framing consists of a doubled valley rafter in the middle that extends from a top plate corner to a second ridge board with angled jack rafters for support. Some of these can support the roof and prevent ridge sagging and wall spreading.