Self Retracting Devices (SRD's)
The recently updated ANSI/ASSP Z359.14-2021 redefines Self Retracting Devices (SRD’s) as a general term used to describe three different types of devices.
Self Retracting Device Types
SRL’s - Self Retracting Lanyards An SRL is defined as, "A self-retracting device in the form of a mechanical fall arrester, featuring a locking mechanism and energy management system to arrest the fall of and limit the forces imparted on the user." These are the traditional devices that have been in use for decades and are typically installed on overhead anchorages, providing a cone of access to a walking-working surface below. SRL-R’s - Self-Retracting Lanyards with Integral Rescue Capability An SRL-R is defined as "An SRL that includes an integral means for assisted rescue via raising or lowering the rescue subject. Some SRL-R's may alternatively feature a mechanism which facilitates the controlled descent of the fallen user." SRL-P's - Self-Retracting Lanyard, Personal An SRL-P is defined as, "A self-retracting device designed such that it is compact enough and approved by the manufacturer to be worn by the user on a full body harness to be used as a fall arrest connector, or alternatively mounted to an anchorage. These devices may, in some cases, be available in a dual configuration for the purpose of 100% tie-off." SRL's and SRL-R's are not new to the ANSI standard, but the SRL-P is a new addition. Over the last 15 years, SRL-P's have evolved and have become a common alternative to the traditional energy-absorbing lanyard. The requirements established for SRL-P's in the update to Z359.14 are intended
to ensure that these devices are evaluated in a manner that examines the many factors of safety which are addressed in the Z359.13 standard for energy-absorbing lanyards, which are also important for SRL-P's as well. Self Retracting Device Classes The SRD's described above will be qualified according to two classes, which differ from those previously established in Z359.14 back in 2012 and 2014. The new classes are: Class 1: Self-Retracting Devices which shall be used only on overhead anchorages and shall be subjected to a maximum free fall of 2 feet or less, in practical application. Class 2: Self-Retracting Devices which are intended for applications wherein overhead anchorages may not be available or feasible and which may, in practical application, be subjected to a free fall of no more than 6 feet over an edge prescribed in Section 4 of the standard. This class encompasses the SRL-LE that existed under the previous standard.
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