In terms of structural design, what is deemed a live load?

Live load refers to the weight that a structure needs to support beyond its own weight, including the dynamic forces that vary due to occupancy and activities within the building. This specifically encompasses the weight of people, movable furniture, and any other objects that can change over time, such as vehicles in parking structures or equipment in a gymnasium.

Understanding live loads is essential for structural engineers as these loads influence how buildings are designed to ensure safety and stability under varying conditions. Structures must be engineered to accommodate potential changes in occupancy and usage over their lifespan, which is why live load considerations are critical in the design process.

In contrast, other aspects mentioned involve static or permanent aspects of the structure. For example, the weight of fixed building components represents dead loads, which are accounted for separately from live loads. Similarly, the weight of building materials falls under dead load considerations. The resistance offered by structural elements pertains more to the performance characteristics of materials under load rather than what loads need to be supported. Hence, live load remains distinct as it focuses on variable, live factors impacting the structure.