RoRo Focus
acGregor has worked time-
lessly with International regula-
tors to ensure that RoRo and
RoPax ships maintain stability
despite the potential ingress of
cargo handling efficiency.
Operators can take advantage of con-
tinual equipment and system refine-
ments. with relatively small investments
often proving highly cost effective.
Upgrading hydraulic or electric systems,
for example, is a common option as
original equipment ages and compo-
nents needing replacement become
more difficult to source. These can be
replaced by contemporary equivalents
or by more modern alternatives.
A typical upgrading is the replacement
of a manually-operated system by an
electro-hydraulic PLC-controlled sys-
tem, which, via push-button operation,
controls the sequences and leaves the
PLC to check the signal when the oper-
ation is completed.
A new development proving attractive
for RoRo ship newbuildings as well as
retrofit projects is MacGREGOR's
COREX panel for creating fixed and
hoistable car decks/ramps. The stainless
steel sandwich construction yields a sig-
nificantly reduced profile (approximate-
ly one-third the depth) and about half
the weight of an equivalent convention-
al steel panel.
The resulting lower lightship weight,
reduced molded depth and increased
stability can be exploited to maximize
the operational flexibility of a RoRo
ship and extend payload configurations.
Improved profitability and a higher sec-
ond-hand value are thus promoted.
Weight reduction was a prime factor in
Sams0 Linien's decision to retrofit light-
weight COREX panel-based hoistable
car decks to its small vehicle/passenger
ferry Sam-Sine. A larger free height
above and below the hoistable car deck
was also sought. Replacing the existing
hoistable deck with a 98 x 13 ft. (30 x
2.4m) COREX version secured a weight
reduction of 10 tons and extra free
height on the main vehicle deck. The
Danish owner can also anticipate lower
maintenance costs from the stainless
steel construction.
Ships with conventional car decks and
a trailer deck free height suitable for
accompanied trailer traffic can be con-
verted to take unaccompanied trailers or
to accommodate higher trailers by
installing COREX decks. The standard-
ization and modularity of a car deck
built from COREX panels foster short
lead times for conversion projects, says
MacGREGOR, and the container-
friendly decks and associated compo-
nents can be shipped pre-assembled or
for final assembly close to the customer.
Hyundai Heavy Industries ordered
COREX panels for the hoistable car
decks and ramps of two Seapacer-class
RoPax ferries booked by the Swedish
owner Stena RoRo. COREX panels
were selected for the car decks because
of their impact on lowering weight and
their significantly reduced thickness
compared with conventional car decks.
The latter characteristic enabled the
designer to meet the owner's strict spec-
ifications for maximum free height on
the cargo deck without compromising
the stability of the ship.
Circle 65 on Reader Service Card
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largest train ferry, for the Baltic, and series for domestic
and foreign shipowners.
In the Ro-Pax sector too, IZAR has delivered specialist
tonnage, such as paper cassette carriers, and long-range
vessels designed to operate on the most demanding routes.
And can't forget the successful fast-ferries, both monohull
and catamarans, now operating whith great success.
And, most importantly, we are ready to meet any demand.
Let IZAR help build your utopia.
P° de la Castellans, 55 • 28046 MADRID, Spain • Tel. +34 91 335 84 00 • Fax +34 91 441 50 90 • www.izar.es
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May, 2002 17
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