Red Seal Ironworker (Generalist) Practice Exam

In structural engineering, what is the purpose of a "strut"?

1. To support horizontal loads

2. To resist tension forces

3. To resist compression forces

4. To provide decorative elements

The correct answer is: To resist compression forces

A strut is a crucial component in structural engineering designed specifically to resist compression forces. These are loads that push down on or compress a structure, and the role of a strut is to provide stability and support to prevent buckling or failure of the structural system under these compressive loads. Struts are often used in various applications, such as in trusses, frames, and bridges, where they help maintain the integrity of the structure by ensuring that forces acting on it are effectively distributed. When a load is applied, the strut transfers this load to other elements in the structure, allowing for a safe and efficient load-bearing system. In contrast, elements designed to support horizontal loads or resist tension forces serve different primary functions. While decorative elements may enhance the aesthetic appeal of a building, they do not play a structural role like struts do. Therefore, the emphasis on compression in the correct answer illustrates the fundamental purpose of a strut in maintaining structural stability.