Glossary
Live Load
Plain-Language Definition
The variable weight imposed on a building by its occupants, furniture, movable equipment, and stored materials that can change over time.
Technical Context
Design live loads are specified by building codes based on occupancy type: offices 2.5 kN/m2 (BNBC/ASCE 7), corridors 4.0 kN/m2, assembly areas 5.0 kN/m2, storage/warehouses 6.0-12.0 kN/m2, parking 2.5 kN/m2 (cars). Live load reduction factors may apply for large tributary areas and multi-storey columns per ASCE 7 Section 4.7. Actual loading should not exceed design capacity without structural review.
Why It Matters
Exceeding designed live load capacity is a common safety risk, especially when building use changes (office to storage, retail to gym). Understanding floor loading limits is essential for fit-out design, equipment placement, and change of use assessments. Overloading can cause slab cracking, excessive deflection, and in extreme cases, structural failure.
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