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This help desk is a free resource intended for discussion purposes only. Neither BOMA, its chapters, affiliates, or Extreme Measures Inc.® are responsible for the information, comments or opinions expressed herein. For complete information, refer to the official publications of the standards themselves.

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Fireman's Eelvators

Michael Powers
Foster and Partners
December 18, 2014


We have a mixed use tower with 34 levels of office with 18 levels of residential ontop. We require firemans elevators which are required to have a lobby and a connection to a stair. These elevators serve the residential portion of the tower, but in case of fire will be able to stop on all levels, including the office levels. We are considering these elevators, the lobby and connection to the fire stair as a mixed use common area. Would you agree with this interpreation?

Thank you

David Fingret
Extreme Measures Inc.
December 22, 2014

Hi Michael,

Sure those areas can all be MUCA but keep in mind that the MUCA elevators should be classified as Major Vertical Penetrations (and therefore not part of the rentable area) in the global summary of areas for the office use component.

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