A nonbuilding structure, also referred to simply as a structure, refers to any body or system of connected parts used to support a load that was not designed for continuous human occupancy. The term is used by architects, structural engineers, and mechanical engineers to distinctly identify built structures that are not buildings. Examples Aerial lift pylon Aqueduct Avalanche dam Barriers Blast furnaces Boat lifts Brick kilns Bridges and bridge-like structures (aqueducts, overpasses, trestles, viaducts, etc.) Bus stops Canal Carport Chimneys and flue-gas stacks Coke ovens Communications tower Conservatory Covered bridges Dams Dock (maritime) Dolphin (structure) Electricity grid Fountain Ferris wheels Ferry slip Flume Fortification Fractionating towers Gates Granary Greenhouse Hayrack Hay barrack Headframe Infrastructure Lattice tower Marina Memorial Monuments Oil depot Oil platform Offshore oil platforms (except for the production and housing facilities) Piers Pyramid Radio masts and towers Railroads Ramada (shelter) Roads Roller coasters Retaining walls Shed Silos Storage tanks Street lights Street signs Swimming pools Structures designed to support, contain or convey liquid or gaseous matter, including Cooling towers Distillation equipment and structural supports at chemical and petrochemical plants and oil refineries Tank farm Tomb Towers of some types Tramways and Aerial tramways Transmission towers Triumphal arch Tunnels Underwater habitat Water towers Wharves Windmill Exceptions Some structures that are occupied periodically and would otherwise be considered "nonbuilding structures" are categorized as "buildings" for life and fire safety purposes: Aviation control towers Factories Kiosks Lighthouses Outhouses Power stations Refineries Warehouses Cruise ships See also Architectural engineering References nonbuilding