Fall arrest devices (back-up devices) come in a multitude of sizes / functionality, for attachment to rope and cable. As the name suggests, they provide the user with back-up in the event of a fall. They also have a variety of strengths and weaknesses, so it’s important that the user is fully trained in their use. It’s important to note that only certain devices offer the capacity for a two-person rescue load. As a result, some are only suitable for work positioning and fall arrest (not rope access).
EN 12841 type A Personal fall protection equipment. Rope access systems. Rope adjustment devices. Type A refers to back-up devices.
EN 353-2 Personal protective equipment against falls from a height. Guided type fall arresters including a flexible anchor line.
ANSI Z359.15 Safety Requirements For Single Anchor Lifelines And Fall Arresters For Personal Fall Arrest And Rescue Systems.