Fire Department Incident Safety Officer Practice Test

What is a truss primarily composed of?

1. Beams

2. Wood members

3. Steel framework

4. A series of triangles

The correct answer is: A series of triangles

A truss is primarily composed of a series of triangles, which is a fundamental characteristic of its design. The triangular configuration is significant because it allows the truss to distribute loads efficiently across its framework. Triangles are inherently stable shapes, meaning that they do not deform under pressure, which contributes to the structural integrity of the truss. In construction and engineering, the use of triangular configurations in trusses ensures that forces are evenly spread throughout the structure, minimizing stress on any single component. This design helps to create strong yet lightweight structures commonly used in roofs, bridges, and other frameworks. While trusses can be made from beams, wood members, or steel framework, the defining feature that enables their strength and stability is the triangular arrangement, which is why this characteristic is central to their composition.