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

The correct answer is a continuous beam. A continuous beam is characterized by being supported at three or more points along its length. This configuration allows for the distribution of loads over multiple supports, which typically provides greater stability and reduces the amount of deflection when compared to beams supported at fewer points. Continuous beams are commonly used in construction, especially in multi-bay structures, because they facilitate longer spans and efficient load transfer across their supports.

In contrast, a simple beam is typically supported at only two points and is simply resting between them. A fixed beam has fixed supports that prevent rotation and horizontal movement, affecting how loads are resisted. An overhanging beam extends beyond its supports on one or both ends, which is a different arrangement than what is found in a continuous beam. This distinction is crucial for understanding the behavior of beams under load and the implications for structural design.