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Rope grabs: when will they slip? There are many rope grabs used by technicians including: Personal ascenders Attachment devices for raising people and loads Attachment devices for positioning people and loads Just how much can each of
Auto locking belay devices: when will the rope slip? There are many auto-locking devices used by technicians as: Personal descenders Anchored devices for lowering loads Anchored devices to hold tension while raising loads Just how much can
The Skate Block is an excellent low-force technique for lowering and raising. The analysis of the Skate Block is a great example of the application of physics and this enables us to determine where the load should
Friction through Progress Capture Devices (PCDs). This image shows three different devices rigged and loaded as if positioned at the back of a hauling system. We can use the Capstan equation to predict the loss through each
There is a common claim that “Dropped aluminium carabiners should be discarded as they can suffer invisible damage or ‘micro-fractures’ that may cause them to break below their rated strength.” The history of this claim is unknown