Standards for space classifications
IBM® TRIRIGA® uses the standards for space classifications that are established by the International Facility Management Association (IFMA) and Building Owners and Managers Association (BOMA).
Space classification standards | Description |
---|---|
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. |