This help desk is for discussion purposes only. Neither BOMA, its affiliates, nor Extreme Measures Inc.® are responsible for the information, comments, or opinions expressed herein. For complete information, please refer to the official publications of the standards themselves.
Shaft
A Shaft is a vertical opening in the floor slab used for elevators, stairs, or the passage of mechanical, electrical, and plumbing (MEP) systems. In BOMA standards, these are classified as Major Vertical Penetrations and are excluded from the rentable area of every floor they pass through.