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4 - PRINCIPLES OF EDGE MANAGEMENT
PRINCIPLES OF EDGE MANAGEMENT
Edge Management
is the assessment of the rigging tasks and equipment required to safely manoeuvre a load over an edge. A
high change of direction is the key to successful edge management (Figure 48, 49) and the Arachnipod is an exceptionally versatile tool
to facilitate this solution.
A critical point analysis of all rigging should form part of your edge
management assessment. The purpose of the critical point analysis
is to determine if the rigging relies on any single point to provide
operator safety.
Two Rope System
A two rope system provides additional safety by backing up the main
line and any edge management systems. The second line or safety
line is rigged to take the shortest path from the anchor to the load
(Figure 50).
• When the load is located below the edge, the safety line provides
protection for both main line and edge management failures.
• When the load is located above the edge, the safety line provides
limited protection for main line failures.
The Arachnipod can be rigged with the main line passing over the
pulley head, and a rated hauling system can be used to progressively
pick the safety line up as the load is raised (Figure 51).
This process provides additional protection against a main line
failure. Ferno has a range of rated and pre-rigged hauling systems
that are suitable for this task.
WARNING
Edge protection should always be used to protect both lines
against damage and edge trauma. Failure to do so may result
in line failure causing damage, injury or death.
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49
50
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Summary of Contents for Arachnipod
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