DECEMBER 2023 THE CONSTRUCTION SOURCE AMERICA - EAST Some of the most dangerous aspects of working at height are leading edge situations. This is work conducted with an unprotected edge, perimeter or border where a fall hazard exists. Typically, a leading edge situation will force a lifeline or lanyard to ‘bend’ over the edge in the event of a fall over the edge. Additionally, many leading edges also present sharp edge hazards that can fray or even sever a lifeline as it bends over the edge. Here are some other risks that exist due to leading and sharp edge situations: • Increased fall distance be- cause typical anchor point is at foot level • Unpredictable lock up speed – a self-retracting device will only sense a fall when user’s D-ring moves past the leading edge • Increased fall clearance re quirement due to the in- creased fall distance • Increased arresting forces • Potential for sharp edge to cut or severely damage life line • Increased potential for swing falls Currently, the ANSI/ASSP Z359.14 standard for Self-Retracting Lifelines (“SRLs”) has specific test criteria that include testing to simulate added free fall distance, testing performed over sharp steel edge (.005 inch radius), and testing for swing fall over steel edge as well as straight down. One of the Leaders in Leading Edge Protection FEBRUARY 2020 “Typically, a leading edge situation will force a lifeline or lanyard to ‘bend’ over the edge in the event of a fall over the edge.” Note that there is a difference between leading edge (“LE”) and non-leading edge rated fall protection equipment. With LE equipment, the lifeline material is typically larger, stronger, and more cut resistant. You can use LE rated products on a variety of edge surfaces, such as concrete, and they can be used on finished concrete with a rounded edge. A Competent Person must be involved in selecting the appropriate equipment for your application and have ownership of the setup, which involves training. You should feel free to consult with us about your application needs and reference the ANSI Z359 . ALL ANSI/ASSP Z359.14 LE devices MUST have a shock absorbing method between the worker and the SRL. There are also clearance requirements for LE rated products. Typically, more fall clearance is required because of added free fall distance when anchored at foot level. The exact clearance depends on product type, anchorage point location and user weight. For example, SRL-LE “They have highcapacity and uniform energy absorption designed to balance peak force, capacity and deflection.” THE CONSTRUCTION SOURCE AMERICA
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