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发表于 2011-3-2 15:07
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来自： 中国上海
9 Safety Net
9.1 Safety nets for personnel protection should be installed around the landing area
except where adequate structural protection against a fall exists. The netting used
should be of a flexible nature, with the inboard edge fastened just below the edge of
the helicopter landing deck. The net itself should extend 1.5 metres in the horizontal
plane and be arranged so that the outboard edge does not exceed the level of the
landing area and angled so that it has an upward and outward slope of approximately
10°.
9.2 A safety net designed to meet these criteria should ‘contain’ personnel falling into it
and not act as a trampoline. Where lateral or longitudinal centre bars are provided to
strengthen the net structure they should be arranged and constructed to avoid
causing serious injury to persons falling on to them. The ideal design should produce
a ‘hammock’ effect which should securely contain a body falling, rolling or jumping
into it, without serious injury. When considering the securing of the net to the
structure and the materials used, care should be taken that each segment will be fit
for purpose. Polypropylene deteriorates over time; various wire meshes have been
shown to be suitable if properly installed.
NOTES: 1. It is not within the scope or purpose of CAP 437 to provide detailed guidance for
the design, fabrication and testing of helideck perimeter nets. These specific
issues are addressed in the OGUK Joint Industry Guidance for Helideck
Perimeter Safety Nets – Issue 2, March 2008. In due course the Joint Industry
Guidance will be embodied into the OGUK Offshore Helicopter Operations
Guidelines – Issue 6.
2. Perimeter nets may incorporate a hinge arrangement to facilitate the removal of
sacrificial panels for testing. |
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