1.1
Architectural
1.1.1
General
The following subsections define the specifications and requirements for the various
architectural materials, finishes and construction works.
1.1.2
Insulation
The fire rating of the Transformer shelter shall be as follows:
Fire Rated Bulkheads
External walls of shelter
:
A-60
Fire Rated Decks
Roof of the Shelter
: A-60
Base of the Shelter
: A-60
Structural fire protection is to comply with SOLAR Code and Classification requirement.
Insulation shall be calculated according to the environmental condition specified for the
A/C System.
Insulation may comprise of 50 mm thick as minimum with infill insulation at void of
corrugated section with individual thickness and density specified by the VENDOR to suit
the certification requirements for the specified fire rating, thermal requirements. The
material to be used shall generally consist of non-combustible Rockwool with type and
density to suit the VENDOR’s certification. The term non-combustible shall be as defined
by SOLAS Chapter II-2, Part A, Regulation 3 (1).
The insulation of a deck or bulkhead is to be carried past the penetration, intersection or
terminal point for a distance of at least 450mm.
All bulkhead insulation shall be fitted 125mm steel coaming on the deck.
No asbestos-containing materials shall be used.
1.1.3
Internal wall paneling system
Internal wall shall be based on approved proprietary systems. Detachable or hinged
inspection panels shall be provided at locations requiring maintenance access. Design of
detachable panels shall permit removal without interference with ceiling systems.
Wall panels will be in galvanized steel with PVC film finish in general areas
Lining panel of 25mm or 50mm type make of mineral wool with one side of galvanized
steel sheet finished with PVC Film and one side galvanized steel sheet.
Wall panel and lining panel shall be of non-combustible material, and B0 as minimum.
1.1.4
Floor finishes
All flooring materials shall be flame retardant to meet SOLAS requirements. Test
certificates and coloured samples shall be submitted for review and selection by
COMPANY representative. Installation of floor finishes shall be in strict accordance with
Manufacturer's instructions. The floor finish shall be of non-slip, anti-static and anti-glare
type. Floor of the transformer room shall be impervious to transformer fluid FR3.
- Screed Underlay
Floor screed shall be laid onto the floor decks of the control room. It shall comprise a
mixture of latex or epoxy emulsion, fine silica sand and cement to produce versatile
bedding for floor coverings and to even out undulations on the deck plate. It shall comply
with the following criteria:
 Provide a good adhesive bond with the various types of floor coverings that are
laid over it.
 No cracks, corrosion or separation should occur from the steel deck plate after
setting.
 Water, oil and grease resistant, suitable for use in salt laden environment.
 Resistant to deformation under constant loads.
 Heavy-duty, suitable for use in an offshore environment.
 Fire retardant and has type approval Certificate.
-
Rubber Mats
Rubber mats shall be laid in the transformer shelter. Rubber insulating mats shall be
complied with the following requirements:
 Minimum 6 mm thick
 Good electrical volume resistivity
 Electrical insulation strength
 Oil/ chemical resistant
 Meets ANSI/ASTM D178 Type 1 Class 2
 Suitable for use in an offshore environment
 ABS or equivalent test approval certificate.
1.1.5
Doors
Doors shall be composite units (including frame, leaf, hardware and accessories etc) and
shall have the same fire/acoustic/thermal ratings as the walls they are in. All escape route
doors shall be able to be opened in the direction of escape over a greater than 90-degree
swing. Where exit doors open across an external escape route the hinge shall enable up
to 180-degree swing.
All personnel doors shall provide a clear minimum opening of 900 mm wide x 2000 mm
high, miscellaneous doors in risers, etc which may be designed to suit individual purpose.
All doors shall have thresholds and shall be fitted with marine grade self-closers and
stainless-steel hardware. Double leaf doors shall have closing selectors and top and
bottom holding bolt latches on the inactive leaf.
The doors shall be weathertight & gastight and A60 fire class door if they are external
doors