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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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December 27, 2022

If I have an square elevator lobby that is wider than 5 ft and has tenant areas attached- may the whole thing be considered BBC or do I have to divide the area?

David Fingret
Extreme Measures Inc.
December 30, 2022


BBC width can be established according to the building's existing construction or the building's established corridor design standards, so it is entirely possible to have a BBC corridor that is wider than 5 feet. However, there may be other things to consider when establishing BBC length and BBC width that are impossible to determine without looking at a floor plan.


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