155	BUILDINGS AND STRUCTURES: FABRICATED AND PREFABRICATED
15508  *	Bridges, Prefabricated (Not Installed)
15510  *	Buildings, Large, Prefabricated (Over 500 Sq.Ft.)
15512  *	Building (500 Sq.Ft. and Under)
15518  *	Cabins, Storage Buildings, etc. (Pre-Engineered in Kits, Ready to Asssemble and Erect)
15520  *	Canopies, Freestanding
15524  *	Carports, Fiberglass and Plastic
15530  *	Carports, Metal
15540  *	Gazebos
15542  *	Greenhouses and Equipment
15546  *	Guard and Watchman Huts
15548  *	Lifeguard and Umpire/Referee Stands
15550  *	Office Buildings, Modular and Portable
15554  *	Patio Covers, Fiberglass and Plastic
15560  *	Patio Covers, Metal
15570  *	Portable Toilets
15576  *	Shelters, Bus Waiting
15578  *	Shelters, Insulated (For Remote Equipment)
15579  *	Shelters, Non-Insulated
15580  *	Shelters, Portable
15586  *	Structures, Rooms, Panels, Enclosures, etc. (Radio Frequency Shielded)