Which of the following best describes a "joist" in construction?

A joist is a fundamental component in construction, specifically designed to provide support for ceilings or floors. By definition, a joist serves as a horizontal structural member that spans open spaces and distributes loads to vertical supports, such as beams or walls. This role is critical for maintaining the integrity and stability of a structure, ensuring that floors can safely bear the weight of occupants, furniture, and other loads.

Understanding the function of a joist is essential for fire inspectors, as proper installation and spacing of joists can affect fire spread and structural stability in the event of a fire. Inspectors must assess these elements to ensure compliance with building codes and to consider potential fire hazards associated with structural failures.