Fire Department Incident Safety Officer Practice Test

Which type of beam is supported at three or more points?

1. Simple beam

2. Continuous beam

3. Cantilever beam

4. Fixed beam

The correct answer is: Continuous beam

A continuous beam is defined as a structural element that is supported at three or more points. This configuration allows it to span multiple supports, distributing the loads across several points instead of just two as with a simple beam. The continuous nature of the beam helps to improve its load-carrying capacity and can reduce the maximum bending moments compared to simply supported spans. In practical applications, continuous beams are commonly utilized in building structures and bridges due to their efficiency in handling loads and providing stability. The support at multiple points helps to reduce deflection, making them ideal for applications where maintaining structural integrity is essential. The continuous beam can also facilitate better load distribution across its length, which is beneficial when dealing with varying load conditions. This design significantly contrasts with other types of beams, which have different support conditions and load distributions.