Which statement describes live loads?

Which statement describes live loads?

• A. They result from occupancy, snow and water, moving equipment, etc.
• B. They are the weights of the structure and fixtures.
• C. Seismic loads.
• D. They are exclusively wind-induced loads.

Answer: (C)

Live loads are the forces on a structure that can change with time and use, not the building’s own weight. They come from how spaces are occupied and used: people, furniture, movable equipment, and other items that can be relocated or rearranged. These loads vary depending on occupancy patterns and activities, unlike dead loads (the permanent weight of the structure and fixed elements) or environmental/dynamic loads like wind or earthquakes. Snow and water are typically treated as separate load categories (snow load and, for water, hydrostatic or stored-fluid loads) rather than live loads. So the best description is that live loads arise from occupancy and movable contents, not from the structure’s fixed weight or from wind/seismic effects.

Live loads are the forces on a structure that can change with time and use, not the building’s own weight. They come from how spaces are occupied and used: people, furniture, movable equipment, and other items that can be relocated or rearranged. These loads vary depending on occupancy patterns and activities, unlike dead loads (the permanent weight of the structure and fixed elements) or environmental/dynamic loads like wind or earthquakes. Snow and water are typically treated as separate load categories (snow load and, for water, hydrostatic or stored-fluid loads) rather than live loads. So the best description is that live loads arise from occupancy and movable contents, not from the structure’s fixed weight or from wind/seismic effects.