The energy per square metre of floor area of the combustible material present within the internal bounding surfaces of a room, compartment or building.

The quantity and type of material within an area or building that would enhance or support a fire.

Refers to the amount of combustibles present in a given situation, usually expressed in terms of weight of combustible material per square foot. This measure is employed frequently to calculate the degree of fire resistance required to withstand a fire or to judge the rate of application and quantity of extinguishing agent needed to control or extinguish a fire.

The number and size of fires historically experienced on a specified unit over a specified period (usually one day) at a specified index of fire danger.