A mezzanine shall be open and unobstructed to the room by which such mezzanine is found except for walls not over 42 inches (1067 mm) in top, columns and posts. Note, nonetheless, that each one but one of several exceptions refers back to the mezzanine not needing for being open https://stephenjespg.csublogs.com/45843334/mezzanine-gate-for-dummies