"Learning Objective: The student shall be able to describe the fire code requirements for the display of Level 2 and 3 aerosols where the maximum quantity is exceeded in retail display and the storage height does not exceed 8 feet (2,438 millimeters (mm)). […] Level 2 and 3 aerosol products in retail displays create a high challenge environment for fire protection systems. The fire inspector must be able to interpret and accurately apply code requirements to protect these commodities. (See Coffee Break Training 2006-13 for an explanation of aerosol classification levels.) Notice the narrow conditions outlined in today's learning objective: it is limited to retail display up to 8 feet (2,438 mm). Other conditions, such as a warehouse storage or heights greater than 8 feet (2,438 mm), require different protection features. The maximum net weight per floor of Level 2 or 3 aerosols that can be stored up to 8 feet (2,438 mm) in retail display differs based on the model fire code in place."
Coffee Break Training - Fire Protection Series No. FP-2012-43
United States Fire Administration: http://www.usfa.fema.gov/