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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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VERT PENETRATION

JOE KOCH
ODP
September 18, 2019

When measuring to fs/ns of a elevator shaft or stair shaft do you measure to the side of the shear wall or to the side of the furred out wall on the shear wall?

David Fingret
Extreme Measures Inc.
September 20, 2019

The standard states:

"Walls that are required by code to enclose a Major Vertical Penetration are included in its area. Additional enclosing walls outside code required enclosing walls, as well as the space between them, are not included in the area of a major vertical penetration, but may be included in the area of adjacent common areas or units."

With that I would say that any furring should be excluded from your measurement of Major Vertical Penetrations.

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