Standards for space classifications
IBM® Maximo® Real Estate and Facilities uses the standards for space classifications that are established by the International Facility Management Association (IFMA) and Building Owners and Managers Association (BOMA).
These standards are used to calculate the area measurements of buildings and
spaces.
Note: IBM Maximo Real Estate and Facilities supports the 1996 BOMA standard.
- Exterior gross
- The total floor space of a building, including unusable space or excluded areas, which is measured from the outside walls.
- Interior gross
- The total measured area that is calculated from the inner surface of the walls, including rentable areas, interior parking, vertical penetration, and void areas.
- Building rentable
- The area within the interior gross that includes the usable area and a prorated portion of the common areas on the entire office floor. This area does not include vertical penetration regions, such as elevators, stairs, or mechanical risers.
- Usable area
- The total area that can be occupied. The usable area on a specific floor of a building depends on the corridor configurations and whether the floor has single or multiple occupants.
- Assignable area
- The space that is assigned for a specific purpose, for example, cafeteria.
- Exterior wall
- The outer wall that surrounds the total interior gross.
- Interior parking
- The area within the interior gross that is available for parking. This area is allotted by dividing the total rentable square footage area of a building by the total parking space.
- Vertical penetration
- The vertical penetration regions within the interior gross include the elevators, stairs, atrium, and the other common areas.
- Core building services
- The regions within the building rentable area that are dedicated to providing maintenance and core services for the building or structure.