Bs 5410-3

This is the structural engineering phase. The standard guides the assessment of:

The standard guides the calculation of the Fire Load Density ($q$). This represents the total potential heat release of combustibles in the compartment (MJ/m²). bs 5410-3

Once the gas temperature is known, the engineer calculates the temperature of the structural members (steel, concrete, timber). This is the structural engineering phase

The calculated performance is compared against acceptance criteria: bs 5410-3