The galvanized guard rail is used with MetalTech guardrail posts Model No. M-MGPUSL (SKU 770263) for safety and security on exterior scaffolding structures. A minimum of (2) guardrails (upper and midrail) must be installed on each side of the scaffold. Guardrails must be installed along the perimeter of all scaffold structures of a height of 10 ft. or more to prevent accidental falls.