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Sealed staircase between multiple levels with different tenants

Jackson Main Architecture
June 13, 2021

I'm doing BOMA calculations for an existing building that has a stairwell that runs from the basement to the third floor and has been sealed off. Each level has a different tenant. How should this unused 'void' space be counted?

David Fingret
Extreme Measures Inc.
June 14, 2021

Hi Sara,

The stairwell is treated no differently than any other stairwell under the standard. It's a Major Vertical Penetration and therefore not included in the rentable area of the building.


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