Sky Climber
ZEABORN GUIDELINES
- Page 30 -
18.11.2020 Version 1
5.4 SKY LOCK OVERSPEED BRAKE INSPECTION/FUNCTIONAL CHECKS
The Sky Lock overspeed brake is a precision device which must be frequently inspected/functionally
checked to assure that it is performing its intended function. See Table 1 - Periodic Inspection Frequency
- and the explanation which follows.
WARNING: Failure to inspect and functionally check the Sky Lock overspeed brake as
required in Table I - Periodic Inspection Frequency - may result in personal injury and property
damage.
5.4.1
WORK ENVIRONMENT
The Sky Lock overspeed brake will be used in numerous adverse environmental conditions. These
adverse conditions with recommended precautionary measures may be grouped as follows:
5.4.1.1 GROUP 1 - NORMAL (+0 °C and above, day/nigh t)
A “Normal Work Environment” includes inspection operations, light maintenance, and window washing.
In this environment the only contaminant that would be expected to be deposited in the Sky Lock brake
is lubricant from the support cable.
Inspection/functional check should be conducted by the operator on a daily basis. However, if any of the
adverse conditions identified below in Group 2, “Contaminated Work Environment”, are present in close
proximity to operations identified in Group 1, the precautions noted in Group 2 should be followed.
5.4.1.2 GROUP 2 - CONTAMINATED (+0 °C and above, da y/night)
A “Contaminated work environment” can be identified as one in which one or more of the following
categories of contaminants are used or are in close proximity to the operation:
Category A:
Abrasive Material (e.g., sand, grit, dust, welding, etc.)
Category B:
Caustic Material (e.g., corrosive chemicals, salty environment, acids or fumes, etc.)
Category C:
Adhesive Material (e.g., cement, plaster, paint, caulking, compound, etc.)
In such work environments, every effort must be made to prevent entry of contaminants into the Sky
Lock brake. Recommended minimum precautions for equipment protection are:
1) Cover the wire support cable above and below the Sky Climber Hoist for a distance of +/- 1.5m in
each direction. A length of rubber hose taped in place is adequate to serve this function. If a wire
winder is used, the guide tube will substitute for the rubber hose below the Sky Climber hoist.
2) Cover the wire winder with clear plastic covers.
3) Do not use contaminated wire rope.
For a work environment with contaminants in either Category A or B, daily inspections/functional checks
by the operator should be conducted at the beginning of each work shift.
For a work environment with contaminants in Category C, inspection/functional checks must be
conducted by the operator at the beginning of each work shift and every four hours thereafter. This is
based upon the fact that the majority of adhesive materials such as cement or plaster will set up hard in
four to eight hours; If the adhesive material being used has a faster setup time, the frequency of the
inspections/functional checks shall be increased accordingly.
