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
Jan 12, 2015
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Two Point Anchor Calculators
These calculators have been recreated on new pages. They apply the same formulas. Find them through these links, or under Reference Items in the Free Content. Two Point Anchor Calculator
Jan 7, 2015
Members: Load Cells and Sampling Rate
Load Cells have been used for decades to measure tension in many situations however most of the user friendly units, like crane scales, simply monitor relatively static systems. The units used to
Jan 1, 2015
Rethreaded Alpine Butterfly Knot
The re-threaded Alpine Butterfly knot is a very useful in-line, low-gain knot for direct tie-ins to closed objects.
Dec 23, 2014
Members: Impact Forces During Factor One Falls
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
Dec 17, 2014