Fire load is measured in what unit to express the energy released by burning materials?

• A. BTUs
• B. Kilograms
• C. Joules
• D. Liters

Answer: (A)

Fire load is about the energy released by materials when they burn, so the unit used should represent energy, not mass or volume. In fire protection practice, BTUs (British Thermal Units) are the standard way to express that energy content, often as BTU per area or per material. Kilograms measure mass, liters measure volume, and while joules are also a unit of energy, the traditional, widely used convention in building fire safety uses BTUs. Note that 1 BTU is about 1055 joules, which helps connect these units to more familiar energy scales. So using BTUs best conveys the potential energy release of burning materials in this context.