Twin Highline Unit 2 : Twin Highline and Twin Track Line Tandem Tension System

Written By: Lance Piatt


The lower section of the Twin Highline is the Tandem Tension System. Where the lines are pulled tight to allow the worker or rescuer to descend with minimal give in the lines. This an overview of a working at height rope access job site. The roof top of a tank can not be walked on, but must have some NDT (non destructive testing) work done on it. A tensioned track line was devised to create a working platform to carry the technician into the job site safely and effectively. Two systems, a set of track lines that tensioned using our 5:1 Tandem Tensioning Kit, and a working platform in which two independent working/safety lines are suspended from the track lines. There is also a belay rope and allows the technician to travel up and or down the track lines. The tandem tensioning system is a 5:1 installed back to an anchor point. Directly connected to the system is the Rock Exotica Enforcer… to enable us to measure the forces exerted on the system. We have used 8mm prusiks in tandem, and have equal pull on both ropes. No point loading with prusiks, so this is an advantage over tooth camming devices. The Rock Exotica Swivel Pulleys (connected with through Petzl Am’d carabiners) are backed to the Rock Exotica V5 Rig. The entire system orients itself perfectly. The Tandem Tensioning System is a new product for Rescue Response Gear. In this video, Sterling Rope HTP 11mm rope was used for the tracking highline. Petzl Am’d carabiners were used through out the system. Rock Exotica swivel pulleys were used in the Tandem For more information about this system and technique


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