Test Reports Archive
The Cats Paw knot is mainly used by anglers but is also occasionally used by riggers to shorten and attach a sling to a hook. The question raised here is whether this knot could be useful for rock
This image shows two possible hauling scenarios each using a Petzl IDs for progress capture. There are several ways to determine the mechanical advantage of this system but it is a good exercise to consider the following
People often ask what peak impact force can be generated during falls. Impact force depends largely on the mass and velocity of the object at impact and how quickly the object stops. Put simply, the faster something
There have often been discussions about the so called “right” and “wrong” ways to tie a figure-of-8 knot and they seem to focus on whether the strand being loaded is on the “inside” or “outside” of the
It is common for rope technicians to work with two ropes. The secondary rope serves as fall protection if the primary rope is severed. This initiates a sudden load over contact points and places significant forces on