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1 <br /> 1 <br /> THE LEADING EDGE <br /> I <br /> The leading edge is that portion of a roof, floor,formwork or other walking/working surface that poses a fall <br /> hazard where the worker is exposed to a position where an accidental fall may reasonably result in an injury. <br /> If employees are required to work within this danger zoite, one or more fall-arrest or fall-protection systems <br /> must be used. These systems include motion-stopping systems,warning lines or safety monitoring systems. <br /> MOTION-STOPPING SYSTEMS <br /> I. Guardrails <br /> A standard guardrail should be constructed of a top rail,intermediate rail,toeboard and posts,and should <br /> have a vertical height of approximately 42 inches. <br /> The top rail should be smooth-surfaced with a strength able to withstand 200 pounds of force applied in <br /> any direction at any point on the top rail with a minimum of deflection,i.e.2 inches. <br /> Guardrails are not intended or designed to support the employee while working. Do not lean or stand on <br /> guardrails. <br /> Some guardrails have gates or removable sections to facilitate material handling. Make sure that gates <br /> are closed and removable sections are replaced when not in use. <br /> fF <br /> 2, Personal Fall Protection E( <br /> This is a system which is designed to arrest an employee in a fall from working level. It consists of an <br /> anchorage point, connectors,a body harness and may include a lanyard,deceleration device, lifeline or a <br /> suitable combination of these components. <br /> 3. Safety Nets <br /> Persomiel nets can be used effectively in bridge construction or long-tern structural projects. Nets can <br /> also be used where large open areas exist(floor openings), or where long leading edges expose workers j <br /> to fall hazards. <br /> Nets should be installed as close to the leading edge as possible,but no lower than 25 feet. <br /> If the drop is 0 to 5 feet, the net should extend a minimum of 8 feet from the leading edge on a horizontal <br /> plane to the outer edge of the net. A drop of 5 to 10 feet requires an extension of 10 feet and fi-om 10 to <br /> 25 feet an extension of 13 feet. <br /> I <br /> NOTE: Personal fall protection systems should be used when installing nets. <br /> 4. Scaffolds or Platforms <br /> i <br /> Scaffolds and platforms with guardrails can also be installed next to the leading edge to catch a worker <br /> who has lost their footing and gone over the leading edge. This system has the advantage of being <br /> sufficiently offset from the actual working area so as not to interfere with operations while providing <br /> protection. <br /> i <br /> i <br />