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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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Method B Extensed Corridors and Tenant Ancillary calculations

Nicole Berns
October 11, 2018

I have a 3 story building where the second floor has an entry/exit on one side that is at grade. The main lobby is on the first level. The tenant spaces on floor 2 are not defined yet and the first tenant on this floor is questioning the USF from the landlord who is using Method B. I have identified BBC and Tenant Ancillary (areas of extended circulation and door setbacks. However, I am questioning the section of corridor leading to the exit. Would it be Building Service? Part of BBC? or simply Tenant ancillary extended corridor that gets divided between tenants? Thank you!

David Fingret
Extreme Measures Inc.
October 11, 2018

Hi Nicole,

If this section of corridor is permanent because it is required for egress, then Building Service Area would be the most appropriate allocation.


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