What does the term "live load" refer to in roofing?

The term "live load" in roofing specifically refers to the weight of temporary objects that can be on the roof at any given time, such as people, equipment, or snow accumulation. This load is dynamic, meaning it can change over time with changing conditions and usage of the roof.

Understanding live loads is crucial for structural engineering and roofing because they are considered when designing roofs to ensure they can support additional weight without compromising safety. Live loads differ from dead loads, which refer to the permanent weight of the roof itself and any materials that are part of the building structure. Being aware of temporary extra weight is vital for ensuring that roofs are both functional and safe during various conditions such as maintenance work or heavy snowfall.