Mezzanine Understructure: Sheet metal bent to a c-channel in a break press.  Tubular steel columns.

Mezzanine Stairs, Gates, and Handrail: Common Stairs: OSHA and BOCA. Common Handrail: Horizontal 2 and 3 Rail, Solid Panel Handrail.  Common Gates: Lift Out, Swing, and Sliding Gates.  For more info see Mezzanine Stairs, Mezzanine Gates, Mezzanine Guardrail.

Decking Options: Common varieties are: Bar Grating, Stainless Diamond Plate Steel, Plank Decking.  For more info see Mezzanine Decking.

Finishes: Stainless Steel.  For more info see Mezzanine Finishes.

Benefits: Stainless steel is highly resistive to wet environments, most chemicals and is an FDA approved surface.  The latter being the largest benefit.  They are generally designed for easy wash down and are commonly put in food, or other FDA regulated, processing plants.

Drawbacks: MONEY; stainless steel is very expensive, very expensive!  Stainless steel mezzanines are restricted to smaller column spans, generally 10' - 20' max.