Modular mezzanines are a convenient and cost-effective method of quickly creating additional floor space within the interior of an existing large structure, such as a warehouse, retail store or industrial building.  Popular designs include structural framing, stairs, and steel grate decking.  The most common purpose of modular mezzanines is to provide additional storage space.  Some specialized modular mezzanines provide enclosed rooms with complete utility services, including lighting and air conditioning, to create offices and finished interior spaces.