ISO 4157 is an

ISO ISO is the most common abbreviation for the International Organization for Standardization. ISO or Iso may also refer to: Business and finance * Iso (supermarket), a chain of Danish supermarkets incorporated into the SuperBest chain in 2007 * Iso ...

standard Standard may refer to: Symbols * Colours, standards and guidons, kinds of military signs * Standard (emblem), a type of a large symbol or emblem used for identification Norms, conventions or requirements * Standard (metrology), an object th ...

for construction drawings and designation systems. It is composed of 3 parts: *ISO 4157-1:1998 "Construction drawings -- Designation systems -- Part 1: Buildings and parts of buildings" *ISO 4157-2:1998 "Construction drawings -- Designation systems -- Part 2: Room names and numbers" *ISO 4157-3:1998 "Construction drawings -- Designation systems -- Part 3: Room identifiers" Main definitions: *Floor n: is the horizontal partition between storey n and storey (n+1). The floor in storey 5 is named as floor 4. *Room: identifiable physical space (area or volume, space or void) real or theoretical, although not necessary a traditional room (i.e., enclosed by walls, ceiling and floor). *Room identifiers: registration number of spaces: *Room numbers: numbers (code) of rooms Standard samples: 00 Ground floor 05 5th floor -2 2nd basement floor #0215 2nd floor, room 15

See also