Rope Rescue Hauling Systems

The photographs show the same system applied using real devices.

Rope rescue hauling systems. I set this system up in the lab and measured the actual hauling tension applied to raise a 100kg technician for each of four different scenarios. The hauling is completed on the right hand rope while the backup rope is taken in on the left. Whether the end of the rope connects to the anchor or to the load is a subtle difference between mechanical advantage systems that have an even number e g 2 1 4 1 6 1 etc and systems that. 2 to 1 victim weight divided by 2.

Any ultimate benefit from the rescue maneuver hinges upon pulleys systems for rescue industrial rope. The 4 1 system can be rigged as either a simple or compound system. The obvious challenge of importance to the rescue attempt is the need to get the victim down. Risk of jamming due to rope getting crossed while sending the pulley to the victim requires a lot of rope.

3 1 system the 3 1 is the classic mechanical advantage system used by rescuers. Access for technicians using rope and other rigging systems to perform work at height or who work in hazardous environments that may require specialized safety equipment to prevent falls or other on the job. The downside of systems with a 5 1 or higher mechanical advantage is you have to pull a lot of rope to move the load a short distance. As one of the most versatile tools in rope rescue the cmc aztek proseries system reflects our philosophy of keeping rigging equipment simple efficient light compact and multi purpose.

The load is supported on a separate rope held by a ratchet and a pre rigged mechanical advantage system is connected to the haul line with a prusik hitch when the load needs to be raised. A simple 4 1 system is built by starting at the anchor and threading the rope through pulleys on the load the anchor and back to the load. Rope team of two tied in mid rope with the ends free and reserve rope stored in the packs. Even if you only need to raise a load 20 feet using a 5 1 you will have to pull a whopping 100 feet of rope and probably reset the system many times.

Pulley systems introduction victims in the field of rescue often times find themselves stranded somewhere well above head level on cliffs mountains bridges buildings and other structures. It requires less rope than a non piggybacked 2 1 system is reasonably easy to rig is easy to add a progress capture device provides an appropriate amount of mechanical advantage to raise one or two people and with a few tweaks it can be converted into a simple 5 1 system. Notice however that the end of the rope on 2 1 systems is attached to the anchor whereas the end of the rope on 3 1 systems is attached to the load. Originally developed by reed thorne of arizona based ropes that rescue the aztek arizona technician s edge kit is used worldwide and offers more than.

Another method that can be used is to piggyback a mechanical advantage system on a haul line.