Mezzanine Understructure: Structural fiberglass shapes that are generally pultruded. Structural fiberglass I-beam columns

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

Decking Options: Common varieties are: Fiberglass Bar Grating.  For more info see Mezzanine Decking.

Finishes: Smooth Fiberglass.  For more info see Mezzanine Finishes.

Benefits: Fiberglass won't rust or contaminate.  It can be immersed in water and easily washed down.  Structural fiberglass color won't ever "chip off" because it is molded into the fiberglass.

Drawbacks: Fiberglass mezzanines are much more expensive than their steel counterparts ( usually 2-3x).  Fiberglass systems have more "give" than steel, components such as handrail sway a bit.