Name: American Death Triangle is a Myth | Videos | Gan Jing World
Uploaded: 2021-06-30T04:00:00.000Z
Duration: 27 min 20 s
Description: If a span is 180 degrees it has infinite force on it. Even zipline and electric wires have sag in them. So 170 degrees is 5x the force as what is applied in t... | Videos | Gan Jing World

HowNOT2

https://video2-us-west.cloudokyo.cloud/video/v3/09/09/68/0909689b-8d1b-4c16-a87e-7b9e108b8adf/master.m3u8

If a span is 180 degrees it has infinite force on it.  Even zipline and electric wires have sag in them.  So 170 degrees is 5x the force as what is applied in the middle.  I thought an American Death Triangle put magical amounts of forces on the bolts and anchor material since the top line is 180 degrees.  Come to find out it is not that bad.  If you want to read about the math, check out https://overtheedgerescue.com/rope-rescue/american-death-triangle/

OUR RESULTS
At 60 degrees (equilateral triangle) and 40 degrees we had about 70% of force on the bolts than the master point.  As wide as we could go created 150% of the master point's force.  The top of the ADT was never more than 50% of the master point!!!  Angles of the legs mattered a lot!  See time stamps for each set of tests.  Too much and too complicated to write everything down here.  Please build your anchors properly with acute angles!

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00:00 The Myth
01:20 Setting up
04:18 1st Test
06:24 2nd Test
07:32 3rd Test
10:34 4th Test
11:55 Testing Rappels Wide
16:44 Testing Rappels Normal
19:09 Giant Sliding X
21:05 Conclusion
23:33 How to build a proper anchor