Mezzanine shelving typically consists of two elevations of shelving units bolted together vertically, with a mezzanine walkway in the aisle of the upper elevation. Personnel walk on the aisle mezzanine for access to the upper elevation. The aisle mezzanine is located approximately 84 inches above the floor and uses the shelving for support. Stairways are provided to allow access to the mezzanine level. Mezzanine shelving is generally found in configurations of two or three levels; however, they are not structurally restricted to three levels. Freestanding mezzanines are occasionally used to provide mutilevel shelving systems. The freestanding mezzanine is an unbroken floor grating that relies on a series of columns for support. This variety offers the advantage of utilizing a portion of the elevated space for purposes other than shelving storage.
