The accident happened when the strap did what is known as a roll-out, where
it gets turned backwards inside the d-ring, and exerts pressure on the
latch.
This is the reason that double releases are now used by anyone wanting to
remain alive.
The roll-out was demonstrated to me in a bar, after work, by a seasoned pro,
as he
had me lean back against my belt, at which point I landed on my butt on the
floor.
Way too fast to ever catch myself.
Also, the last time I ever used that lanyard again.
Climb safe, or get a pro to do it right.
Ken / Ken's Antenna Services / n8gan
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