Guardrails One of the more common OSHA citations is for lack of or improperly erected guardrails. There are two basic types of guardrails – the perimeter guardrail (i.e., found on flat roofs, upper stories before framing walls) and floor opening guardrails. Both are constructed the same way and are designed to provide the same type of protection. Guide for Discussion The following items should be reviewed when discussing guardrails: When are they required? All open-sided floors or floor openings exposing workers to a fall of six feet or greater (Four feet – general industry). Standard Specifications The top rail should be 42” high and constructed...