What best defines a building load?

• A. The color of exterior walls
• B. The annual energy consumption
• C. Static and dynamic weights that come from the building itself and anything that is placed within or acts upon the building
• D. The weight of people wanting to enter

Answer: (C)

Understanding building load means knowing all the forces the structure must resist. This includes static (dead) loads from the building’s own weight and permanent components, dynamic (live) loads from people, furniture, and other movable items, plus environmental actions like wind and snow that push on or act upon the building. The description that mentions static and dynamic weights coming from the building itself and anything placed within or acting upon it best captures these ideas, because it covers both the permanent and variable forces as well as external actions the structure must support. The other options describe things unrelated to the forces the structure must bear: color has no bearing on loads, energy use is a performance metric, and the idea of people wanting to enter isn’t a structural load.