Roof Framing Terminology

Roof structure definitions support choices for sloped roofs cantilevered roofs cathedral ceiling roofs.

Roof framing terminology.

This is to help prevent deflection and sag in the roof. Key timber frame terminology. However green building uses a single top plate and ensures that rafters and ceiling joists sit on the plate directly over the studs. Includes illustrations that show roofs have hip rafters ridge boards jack rafters and more.

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. Collar ties rafter ties tension beams structural ridge beams. These are short spars that run from a hip to the eves or from a ridge to a valley. It is a waterproofing layer made of regular felt stacked above the solid.

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. Some of these can support the roof and prevent ridge sagging and wall spreading. Common types of roofs and basic framing terms.

An example of each is shown in figure 2 1. It is the form most commonly used by the navy. Sway bracing there are a few ways to sway brace the wall. A term used to describe a pitched roof the ends of which are also sloped.

It is simple in design economical to construct. 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. Top plate or plates in conventional western platform framing there are two top plates. 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.

A composite decking made of solid materials it resembles real wood and particularly strong and stable for bearing heavy load. Gable a gable roof has a ridge at the center and slopes in two directions. 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. Here is a closer look at common roofing terms.

When repairing or replacing a roof it pays to be familiar with these terms. 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.