What is the term for a beam used in construction?

In construction, a joist is a specific type of beam that is used to support floor and ceiling systems. Joists are typically horizontal and are often made from wood or engineered materials. They are installed at regular intervals to create a framework for flooring or ceilings, providing the necessary support for loads as well as contributing to the overall structural integrity of a building.

The other terms listed, while related to structural components, refer to different elements. A beamlet is not a standard term commonly used in construction and does not describe a structural member. A truss is a framework typically made of triangles that is used to support roofs or bridges rather than serving as a simple beam. A column, on the other hand, is a vertical structural element designed to support loads from above, contrasting with the horizontal orientation of joists. Understanding the distinctions among these terms is essential in construction and structural engineering.