What type of beam is supported only at one end?

A cantilever beam is uniquely designed to be supported only at one end, which allows it to extend out into space without any additional support on the other side. This configuration is particularly useful in various construction applications, such as balconies or overhangs, where it is necessary for a structure to utilize space while maintaining aesthetic integrity.

The key characteristic of a cantilever beam is that it can carry loads applied at the free end and transfer these loads back to the support. This design causes bending moments and shear forces, requiring careful engineering to ensure stability and safety.

In contrast, the other types of beams mentioned do not share this characteristic. A continuous beam is supported at multiple points along its length and spans over several supports, distributing loads differently. A simple beam is supported at both ends and carries loads in a more traditional manner, while a composite beam comprises multiple materials to enhance performance but still requires more than one support point.

Understanding the functionality and application of a cantilever beam helps in recognizing its importance in architectural designs and structural engineering.