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SYMPTOM
POTENTIAL CAUSE
High wind conditions
Redirection
cable
sagging
(continued)
System friction
11.1 Before You Call
Have you:
ƒ Verified the zipSTOP has been installed as directed in this manual?
ƒ Performed the steps in this troubleshooting section?
ƒ Ensured your warranty and registration form has been initialed, signed, and mailed?
ƒ Ensured your maintenance and recertification information is available?
ƒ How long has your webbing been in use?
ƒ Measured arrival velocities, braking distances for your weight range and compared to the braking dis-
tance charts?
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RESOLUTION
If the prevailing wind is particularly a crosswind, the redirection lines can be
pulled way out of alignment with the redirection points increasing friction
and drag in the system. Where possible, wind should be shielded or blocked
or lines shortened to minimize side wind loading on the redirection assem-
bly. Testing should ensure safe operation during high crosswinds or low
crosswinds. In some cases extremely high crosswinds can indicate shut
down or operational safety limits that need to be a part of your operational
safety parameters. Using a small diameter redirection rope, such as Head
Rush Technologies' 6mm diameter Gorilla Rope, will greatly reduce the
amount of wind loading on the redirection line.
Substandard pulleys, unnecessary redirection points, multiple rope angle
changes, and uncharacteristically difficult redirection angles will add friction
and inertia to the system in addition to weight of the system. Additional
weight and drag will result in sub optimal retraction and line sagging. Elimi-
nate unnecessary points and eliminate tight angles and high friction devices
where possible.
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