Live Load

Definition

Any load that is not permanently applied to a structure. The weight of people, furnishings, machines, and goods in or on a building. The vertical load superimposed by the use and occupancy of a building.

Purpose

Live loads account for the variable forces that a structure must support during its use. Proper consideration of live loads is essential for ensuring the safety, stability, and longevity of buildings and structures.

Examples of Use

• Office buildings: Accounting for the weight of people, office furniture, and equipment.
• Residential buildings: Considering the load from occupants, furniture, and household items.
• Public venues: Calculating the live load for arenas, theaters, and stadiums to accommodate large crowds and movable equipment.

Related Terms

• Dead Load: The permanent, static weight of the structural components, including walls, floors, and roofs.
• Dynamic Load: Loads that involve motion, such as wind or seismic forces.
• Load-Bearing: The capability of a structure or component to support loads without failing.

Notes

• Building codes specify the minimum live load requirements for different types of structures and occupancies.
• Structural engineers must design buildings to withstand the expected live loads plus additional safety factors.
• Regular inspections and maintenance help ensure that structures continue to safely support live loads over time.