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RALF - rescue auto locking fall arrest system

RALF (Rescue Auto Locking Fall Arrest System pulley) can be set up with a combination of prussik pulleys to create a 3:1 or 5:1 mechanical advantage with virtually any length of rope to create a simple hauling system for one or two person loads. If at any point during lifting or lowering the user loses control the overspeed brake will lock, arresting a fall within inches. The locking mechanism is not set up to be a one-use system and therefore does not have to be serviced after every fall arrest, however a thorough inspection of the rope and device will be required as well as a six-monthly thorough inspection and whatever replacement parts are required at that time.

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Product Features

  • Lightweight and compact
  • 3:1 or 5:1 ratio options
  • Overspeed brake
  • Easy to use
  • Dimensions: head only 100mm x 90mm x 70mm
  • Capacity: no limit to ultimate system length
  • Arrest force: Max 6kN
  • Max user weight: 250kg EN 250kg ANSI

Principal Materials

  • Heat treated, anodised aluminium and stainless steel
  • 11mm low stretch kernmantle polyamide rope


  • ANSI Z359-4:2007 250kg
  • EN 1891-A rated rope only
Products: Descent & Rescue Back to: RALF rescue auto locking fall arrest system

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