What role do joists play in a structure?

Joists play a crucial role in supporting the structure by spanning between two columns or walls. This function is essential for creating a level surface in floors and ceilings, effectively distributing weight across the space. By spanning these distances, joists help to maintain structural integrity and stability, allowing for safe load bearing while preventing sagging or failure under weight.

The focus on the span between columns or walls highlights the joists' role in the overall framing system of a building. They are typically horizontal members that serve to transfer loads to the walls or columns below, ensuring that the load is distributed evenly and that structural loads are effectively managed.

Understanding this function is important for comprehending how different elements of a building work together to form a safe and durable construction. Joists are integral to the framework, allowing other components, such as floors and roofs, to be built upon them efficiently.