How is the application rate of class B foam expressed?

The application rate of Class B foam is expressed in gallons per minute per square foot. This measurement is crucial as it helps determine the amount of foam concentrate that should be applied over a given area for effective firefighting operations involving flammable liquids. Using this rate allows firefighters to apply foam uniformly and efficiently, ensuring it reaches the surface of the burning liquid and creates a sufficient blanket to suppress the fire.

This approach helps in standardizing foam application, giving operators a clear guideline on how much foam is needed for different fire scenarios, ensuring effective coverage and maximizing the foam's efficacy in controlling and extinguishing fires.