Roof Members Terminology

Each term is accompanied by a brief definition.

Roof members terminology.

Some of these can support the roof and prevent ridge sagging and wall spreading. Terminology commonly used in the metal building industry. They do for the roof what the joists do for the floor and what the studs. A condition where both the top and bottom chords extend beyond a support structure with no bearing at the extended end.

Collar ties rafter ties tension beams structural ridge beams. A horizontal member that establishes the lower edge of a truss usually carrying combined tension and bending stresses. Rafter the members making up the main body of the framework of all roofs are called rafters. A structure designed and constructed to house farm implements hay grain poultry livestock.

A roof s slope is the number of inches it rises for every 12 inches of horizontal run a roof with a 4 in 12 slope rises 4 inches for every 12 inches of horizontal run. A building product which supplements a basic solid panel building such as a door window light transmitting panel roof vent cupola soffit wainscot overhang etc. Slight vertical cut on the outside edge of truss bottom chord to make sure uniform nominal span typically 1 4 inch cantilever. Common roofing terms defined explained.

The portion of the roof projecting out from the side walls of the house. It is a waterproofing layer made of regular felt stacked above the solid. 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. The following is a list of terms or phrases commonly used in the roofing industry.

The following diagram shows the terms used for general roof truss members. Terms for roof truss members. To search the glossary for a specific word or phrase hit the ctrl and f buttons on your keyboard simultaneously and enter the keyword you wish to search for. A low slope or flat seeming roof covered with alternating layers of roofing felt and hot mapped asphalt and topped off with a layer of gravel.

Below are some commonly used terms that identify parts of a roof and types of roofing. The same roof has a 4 12 or 1 3 pitch. The edge of a roof which runs from eaves to ridge at a gable. 1 part of a pitched roof construction that receives the feet of the spars sp ars and ceiling joist ends.

The following diagram shows the terms applying to gable end roofs. A composite decking made of solid materials it resembles real wood and particularly strong and stable for bearing heavy load. The terms pitch and slope are simply two different ways of expressing the same measurement.