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TriPod User Manual
AA0277.indd REV 04
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No Entry Fall Zone
DANGER!
FALLING OBJECT HAZARD. The area below an operating crawler must be
kept clear at all times. A clearly marked NO ENTRY FALL ZONE must be cordoned off directly below
the area of crawler operation.
The area below an operating crawler must be kept clear at all times. A clearly marked NO ENTRY FALL
ZONE must be cordoned off directly below the area of crawler operation, according to the dimensions
shown in Figure 16 (below).
Figure 16 - No Entry Fall Zone
Example: If inspecting a tank that is 6m (20ft) tall, the No Entry Fall Zone radii must be no smaller than
3m (10ft) from the area below the area of crawler operation.
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Preparation of Inspection Surface
• Remove build-up of scale, soot, and other debris (i.e. dirt, ice) from surface on which the crawler is to
drive. Excessive build-up will cause the wheels to lose magnetic attraction which may lead to wheel
slippage or crawler detachment.
• Ensure there are no obstructions (other than standard butt welds) or voids in the drive path.
Obstructions and voids, if driven into or over, could cause the crawler to fall.
• Ensure there are no patches of non-ferrous material in the drive path of the crawler. If the crawler
drives over a non-ferrous patch, it will lose magnetic attraction and will cause the crawler to fall.
