A triangular assembly made with 2X4 or other dimension lumber for top and bottom chords and webs. Members are joined with toothed metal connector plates pressed onto both sides of the joints. Trusses are made in a wide variety of â€œstandardâ€ and â€œcustomâ€ configurations for support of roofs. They are custom-computer engineered for all span and load factors for each building.
An engineered building component supporting the roof in place of rafters. Roof trusses are usually constructed in a triangular shape with a number of interconnected pieces that spread a load evenly across the truss.
The basic components of a roof Truss are the top and bottom chords and the web members. The top chords serve as roof rafters. The bottom chords act as ceiling joists. The web members run between the top and bottom chords. The Truss parts are usually made of 2 by 4 inch or 2 by 6 inch material and are fastened together with special metal connector/nail plates. Roof Trusses are common and are designed and produced in a variety of shapes and sizes. The most commonly used roof Trusses, are in light-frame construction and are the king-post, the W-type, and the scissors Trusses. The most simple type of Truss used in frame construction is the king-post Truss. It is mainly used for spans up to 22 feet. The most widely used Truss in light-frame construction is the W-type Truss. The W-type Truss can be placed over spans up to 50 feet. The scissors, or cathedral Truss is used for buildings with sloping ceilings. Generally, the slope of the bottom chord equals one-half the slope of the top chord. It can be placed over spans up to 50 feet. see TRUSS.