Red Seal Ironworker (Generalist) Practice Exam

What is a "cross-brace" and its purpose in iron construction?

1. A vertical member that provides height

2. A diagonal support used to provide additional stiffness and stability to a framework

3. A bracket used to hold beams in place

4. A joint that connects two beams at a right angle

The correct answer is: A diagonal support used to provide additional stiffness and stability to a framework

A cross-brace is a diagonal support element utilized in iron construction to enhance the stiffness and stability of a framework. When incorporated into a structure, it effectively helps distribute forces and loads, helping to resist lateral movements caused by factors such as wind or seismic activity. This diagonal configuration of the brace creates triangular geometries, which are inherently strong shapes that can better handle different types of stresses, resulting in a more stable and durable structure. The other options describe different components of construction that do not accurately represent what a cross-brace is or its intended function. For instance, vertical members contribute to height but do not provide the lateral stability that cross-braces do. Brackets serve different functions, primarily holding beams in position rather than providing rigidity. Joints connecting beams at right angles facilitate connections but do not offer the required diagonal support essential for maintaining the overall structural integrity, which cross-braces provide effectively.