Guardian Parapet Clamp Guardrail System* The Parapet Clamp can be easily installed by a single person without the need for ladders or scaffolding. * By using the adjustable screw, this Parapet Guardrail Clamp can adjust to wall widths between 4" and 15" * This adjustable bracket system weighs only 19 lbs. (including the guardrail post) ** This system is not designed as an anchorage point for a fall protection system. When working near a leading edge, always use a personal fall arrest or