Quantcast Chapter 8 Moving Walks

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CHAPTER 8
MOVING WALKS
8.1 INTRODUCTION
NOTE: Paragraphs identified with a vertical line in the left margin are inspections that should
be made by certified Vertical Transportation Equipment Inspectors only.
8.1.1 Scope
The inspection of moving walks included in this chapter is not only an inspection of all safety
related functions, but is also an inspection to determine the condition of the equipment and
identify areas that need improvement. Proper maintenance is needed to keep the moving walk
operating. When preventive maintenance is lacking, shut downs will occur. Park IV of the
ANSI/ASME A17.2 Inspector's Annual for Elevators and Escalators addresses the safety aspect
of the inspection of moving walks. In this chapter we will identify the specific Division of Part
IV which relates directly to the inspection procedure being followed in this text. It is intended
that each noted division should be reviewed as it is identified and suggested procedures followed.
The maintenance and performance considerations of the inspection will be addressed in the
following text. See Figures 8-1, 8-2, and 8-3, which show various moving walk arrangements
with component names that will be used in this chapter.
8.1.2 Performance Criteria
As was stated previously, the purpose of this type of inspection is to review the entire moving
walks installation, including measuring the operation of specific elements of the system against
standards that have been established either by national codes or engineering practice common to
the moving walk industry. The components of the system selected for testing are those most
directly related to safe operation of the moving walk and the overall installation, although some
items, such as speed of the moving walks, are related to the efficiency of the operation and grade
of service provided. The following is an explanation of the areas that should be tested and
criteria to use for evaluating this performance.
8.1.2.1 Moving Walk Operating Speed. Moving Walk Operating Speed is measured with a
tachometer held against the deck while riding on the unit. Operating speed should be maintained
at a level of plus or minus 5% of the rated speed under any load condition in both directions of
travel. A second speed test should be performed by holding a tachometer on the handrail while
standing at the landing. Both handrails and the stop speeds should be very close. A speed
variation might indicate a condition of handrail slip.
8-1





 


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