Specifications of Systems

Design of Roofing Cable Systems

The key to successful fall protection design lies in identifying the criteria affecting the roof and the way workers will interact with it when performing their duties. Whilst every effort should be made to completely eliminate risk by locating plant and equipment in safe locations, it is inevitable that guttering, skylights, chimneys and other equipment will at some point require maintenance where a fall risk is evident.

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Access points

When choosing, designing, and specifying fall arrest systems using the Constant Force posts, the following steps should be followed:

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Ground clearance, location of the system and number of users

  • The ground clearance must be taken into consideration.
  • Make sure that the system is situated more than 2 meters from the nearest hazard.
  • Identify the type and profile of the roof panel to which the system will be fixed.

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Choosing fall arrest vs fall restraint

Fall restraint system

  • This type of system will prevent the worker from reaching any point where a fall can occur but allows full access to carry out work activities.
  • The Personal Protective Equipment (PPE) used are critical parts of the system design and operation.
  • The use of the incorrect PPE may cause the worker to be unprotected.

Hence, Latchways recommends that all anchorages and components are designed to fall arrest standards. Therefore if the system is misused, for example the wrong PPE is worn, the system will still protect the worker.

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Choosing perimeter systems vs ridge systems

Perimeter Systems

  • Workers find perimeter systems easier to use as the distance between them and the system is usually shorter.
  • The systems can be used after basic training.
  • Such systems are better for wider roofs.
  • The system should be no less than 2 meter from the edge of the roof. Assuming that a worker will attach to the system using a standard 2 meter lanyard, the 2 meters guide distance will protect the worker. It will allow sufficient access for roof edge tasks.
  • Perimeter systems do not give blanket coverage of a roof. If blanket coverage is required and a ridge system is deemed impractical, then a series of interconnected systems must be installed across the whole width of the roof.

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