What are the two classifications of loads caused by gravity?

The classification of loads caused by gravity is centered around the concepts of dead loads and live loads.

Dead loads refer to the permanent static forces that a structure must support throughout its entire lifespan. These loads are typically the weight of the structure itself, including walls, floors, ceilings, and any other permanent fixtures that are intended to remain in place. Since dead loads remain constant and are predictable, they play a crucial role in the initial design and engineering of structures.

On the other hand, live loads are transient and can vary over time. They include loads imposed by occupants, furniture, vehicles, and other movable objects. Because live loads are not constant, they require careful consideration during the design process to ensure that the structure can safely accommodate potential variations without collapsing or deforming under unforeseen conditions.

In essence, dead and live loads provide a comprehensive framework for understanding how gravitational forces interact with structures, making this classification vital for structural integrity and safety in design. Other classifications, such as seismic loads, wind loads, and thermal effects, address different types of forces and environmental impacts, but they do not pertain specifically to gravitational influences.