A mezzanine shall be open and unobstructed to your area wherein these kinds of mezzanine is situated apart from walls not greater than 42 inches (1067 mm) in top, columns and posts. If they're not locations of community accommodation, and are worker offices, then they do satisfy the elevator exemption https://jeffreybeoab.blogunok.com/38585287/getting-my-mezzanine-safety-gates-to-work