Page 155 - Rappelling

Using the ASAPsorber does not require constant of force is generated in a fall. When using this system,
tending by the worker, as the device freely descends workers must keep in mind the distance required for
and ascends with the worker, requiring no additional the device to engage and the lanyard to deploy, and
manipulation once clipped onto the rope. The only be careful to allow for enough clearance.
downside of the ASAPsorber is that if it does get While working, the rappel device is locked off,
below the worker, and the working line fails, the allowing a hands-free work position. To ascend the
slack in the system will create a higher impact force. rope, the Petzl Rig is used in conjunction with a
For this reason Petzl specifies that the ASAPsorber mechanical ascender. The mechanical ascender is
be used only in conjunction with a shock-absorbing clamped onto the rope above the assisted brak-
lanyard, which deploys if more than 2.5 kN (562 lbs.) ing device (ABD), attached to the worker with a

Worker rappelling with a Petzl Rig, holding a
piece of cord attached to a Petzl Shunt, to keep
it open as he tows it down on his rappel. This
technique has largely been superseded by
the innovation of the Petzl ASAPsorber, which
requires no manipulation—it simply follows you
up or down the rope as you work. The Shunt is
Here the worker rappels into his work station still used for work positioning and can be used
using the red rope; the black line is his safety as a rappel backup rigged below an extended
rope. rappel device.

144 RAPPELLING

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