What type of beam is supported on at least three points?

A continuous beam is a type of beam that is supported on three or more supports. This design allows it to span over multiple sections, providing increased stability and load distribution compared to beams supported at only two points. The support points enable the beam to carry loads more efficiently, reducing the amount of deflection under stress. Continuous beams are commonly used in various structural applications, where longer spans are needed, and they help in minimizing moments and shear forces experienced by the supports.

In contrast, simple beams are supported at only two points, fixed beams have supports that restrict rotation and can withstand internal moments, and cantilever beams are anchored at one end while the other end is free. These different configurations serve specific purposes and are chosen based on the requirements of the structures they are used in.