Maximum Heat release=weight of Combustible matterÃ— its heat of combustion.
In a common structure, the fire load comprises of the combustible matter, floor finishes, interior finishes and the structural framework. Fuel load is usually given in terms of the average fire load;
The fire load =combustibleweight/firearea âˆˆ squarefee
When NIST tests were analyzed, they showed an approximate correlation between the Fuel load and an exposure to a fire severity equivalent to the standard time temperature curve.
The weight per square foot (m2) of ordinary combustibles such as wood, paper, and comparable materials with a heat of combustion of 7,000 to 8,000 Btu per pound (16,282 to 18,608 J/Kg) was related to hourly fire severity, as described in Section7/chapter 5/ Table 7-5a/page 7-79 of the NFPAâ€™s Fire Protection handbook.