Single Built Works

The Single Built Works hierarchy contains descriptors for freestanding buildings and other structures commonly considered individual built works or architectural types (e.g.g., "museums", "basilicas", "palaces"). Descriptors for single built works cover a range from complex buildings to minimal accessory structures. Wherever possible, buildings are distinguished from other structures. Buildings are defined as walled or roofed constructions used or intended for occupancy or shelter (e.g.g., "apartment houses", "restaurants"), generally more substantial than other structures that provide only some shelter or enclosure (e.g.g., "tents", "cow sheds"). "Other structures" are considered to be constructions having partial or virtual enclosure or shelter (e.g.g., "cromlechs", "arbors") or freestanding constructions providing no enclosure or shelter (e.g.g., "mounds", "signal towers"). Some structures may be relatively small and exist as accessories to other built works (e.g.g., "fountains", "tombs"). Relation to Other Hierarchies: Some descriptors located in the Single Built Works hierarchy (e.g.g., "schools", "libraries (buildings)") can be used to mean the built works, the organizations, or the institutions. Descriptors for the structural systems and individual building parts (e.g.g., "balloon frames", "garage doors") that make up single built works are found in the Components hierarchy. Rooms, spaces, and other large building subdivisions (e.g.g., "kitchens", "ells") are also found in the Components hierarchy.