Steel Roof Truss Terminology

There are many ways of arranging and subdividing the chords and internal members.

Steel roof truss terminology.

Any irregularity or imperfection in a tree log. Decomposition of wood substance caused by action of wood destroying fungi resulting in softening loss of strength and weight and often in change of texture and color. Structural support of trusses usually walls normally with a timber wall plate. Just as there are many types of roofs with many roof parts there are many different types of roof trusses this extensive article explains through a series of custom truss diagrams the different truss configurations you can use for various roofs.

The term truss has often been used to describe any assembly of members such as a cruck frame or a couple of rafters. While this article focuses on configurations we also have a very cool set of illustrations showcasing the different parts anatomy of roof trusses. The terms pitch and slope are simply two different ways of expressing the same measurement. The same roof has a 4 12 or 1 3 pitch.

Any permanent load such as the weight of the truss itself purlins sheathing roofing and ceiling acting vertically on the truss or truss members. All trusses come with a 1 overhang. All trusses come with necessary nuts and bolts to assemble. Truss terminology the terms below are typically used to describe the various parts of a metal plate connected wood truss.

Bearing cut or seat cut. 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. One engineering definition is. A slight vertical cut usually less than 75mm at the.

The truss profi le span heel height overall height overhang and web confi guration depend on the specifi c design conditions and will vary by application. Truss terms the terms below are typically used to describe the various parts of a metal plate connected wood truss. Aspects of truss design for roofs truss or i beam. Custom overhang and pitches are available for additional charges shown below.

The truss profile span heel height overall height overhang and web configuration depend on the specific design conditions and will vary by application. Two basic types of trusses the pitched sor common. The wall plate width see figure 7. The highest point on a truss where the sloping top chords meet.

A horizontal cut to the bottom of a sloping bottom chord usually the width of the bearing i e. Truss derives from the old french word trousse from around 1200 which means collection of things bound together. A truss is a single plane framework of individual structural member sic connected at their ends of forms a series of. The truss profile span heel height overall height overhang and web configuration depend on the specific design conditions and will vary by application.

The fink truss offers economy in terms of steel weight for short span high pitched roofs as the members are subdivided into shorter elements.