(Photo courtesy of John Burt Associates Limited)
9.12 HELIDECK SURFACE TRIP HAZARDS
Where tie-down points, net tensioners, perimeter lighting fixtures, etc. have been located, proper attention should be paid to design and equipment selection to eliminate potential trip hazards.
9.13 HELIDECK STRUCTURAL MAINTENANCE
9.13.1 Main References
Reference CAP 437, Chapters 5 and 7.
9.13.2 Introduction
The designer of a helideck should always take due notice of the requirements for future maintenance and inspection work on the helideck. It is recommended that the designer review historical statistical information from previous inspections to determine any causes and trends in maintenance and inspection work, and to allow for identification of any common factors.
The designer should also be aware that the helideck would be incorporated into a fully integrated schedule of inspection on the installation when it becomes operational. On fixed platform installations, it is common practice for a written scheme of examination to be in place. This document maps out a series of inspection tasks that are to be undertaken to a prescribed set of procedures on a similarly prescribed inspection schedule. The schedule is determined by a number of factors including the safety critical rating of the elements of the helideck in question.
A structural integrity management contractor will use the output from the final design report produced by the designer to identify safety critical elements on the helideck. It is therefore the responsibility of the designer to ensure that the final design report takes due note of the above point and a paragraph or section is included in the design report which highlights specific areas / tasks recommended for future inspection. The structural integrity management contractor can use this in the future.
Similar inspection regimes will be in place for helidecks on other installations such as drilling rigs, vessels etc.
The detail design of the helideck structure should also allow for satisfactory access for all maintenance and inspection activities.
Access should be considered for both inspection of the main structural elements of the helideck and 'local' access to facilitate removal of components if this becomes necessary during the life of the helideck.
The designer should be aware of those helideck elements that will be subjected to detailed maintenance and inspection in the future. These include:
.
The helideck -supporting steelwork etc
.
Corrosion protection systems
.
Fire protection systems
.
Visual aids - markings and lighting
.
Communications equipment
.
Miscellaneous equipment, de-icing equipment etc
.
Refuelling system (if applicable).
These topics are addressed in greater detail in Section 11.
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