Forums: Climbing Information: The Lab: 60 meter fall (fall factor 1); will a 10.5mm rope hold?: Edit Log




USnavy


Nov 9, 2007, 12:07 AM

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Registered: Nov 5, 2007
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60 meter fall (fall factor 1); will a 10.5mm rope hold?
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I noticed that the force calculator on Petzel's site is dependent on fall factor. The simulator basically states that the fall factor is what depicts how much stress the equipment sees, not the length of the fall. It suggests this by stating a fall of 5m from a height of 10m produces the same force as a fall of 20m from a height of 40m (both fall factor 1 falls). The simulator also states that a fall using the two examples I listed with a weight of 75kg produces a force of 10 kN on the anchor with a 10.5mm rope.

Well judging by the info that simulator provided me with I could tie a dynamic rope to a bridge, jump off of it, fall the full 60m of the rope (fall factor 1) and place only 10kN of force on the rope and bridge. Well that doesnít sound right. Is the simulator actually correct? I donít understand how you can fall 60m and produce as much force as if you were to fall 5m with a fall factor of 1.

Does anyone actually know of someone who used a dynamic rope as a bungee rope? Does it actually hold?


(This post was edited by USnavy on Nov 9, 2007, 12:08 AM)



Edit Log:
Post edited by USnavy () on Nov 9, 2007, 12:07 AM
Post edited by USnavy () on Nov 9, 2007, 12:08 AM


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