When are guardrails required on roads?
Score: 4.4/5 (10 votes) Guardrails in the US are generally required by code where there is a drop of 30 inches (0.76 m) or more.When must guardrails be installed?When do you use guardrails? Install a guardrail if the fall hazard or working at heights cannot be eliminated. Guardrails should be used w...