“Common Structural Rules ( CSR ) - Impact on Design
Philosophy of Bulk Carriers”
Meeting report by John Kokarakis
On Thursday June 17th 2010 the last technical
presentation of the Greek Section for the 2009-10 season took place at the Maran
Tankers, Inc. Auditorium, with about 45 persons attending. The presenter was
Mr. Peter Contraros Director of PDC Consultants. The topic of the presentation
was the impact of the Common structural Rules on the design of Bulk Carriers.
The paper was launched by Mr. Spyros Phokas, a long time colleague of the
presenter. This important presentation touched the weak points in the CSR and
outlined in a lively way the shortcomings of the new rules.
The main objection
was focused on the issue of the reduction of the double bottom height and the
number of bottom girders. This fact combined with the continuous increase of
the floor space leads to vessels with weaker double bottoms. Immediate
consequence is the appearance of cracks at the intersection of the lower stool
with the tank top propagating through into the inner bottom or in the
longitudinal girder. The presenter convincingly proved by Finite Element
Analysis that the CSR Rules lead to weaker designs.
presented a large number of deficiencies in the CSR for which there was an
exchange of opinions and arguments under the auspices of the Knowledge Center
idea established by IACS to improve the rules. The meeting ended with a very
lively question and answer session with the wish that the rules will be
improved for the betterment of the maritime community.
Last but not least
we wished each other a pleasant summer during our reception following the
meeting. It is noted that everybody was jubilant following the win of the Greek
national team against Nigeria in the Mundial.
From Left: N. Dionissopoulos, Membership Chair; P. Contraros, Author; P. Lalangas, Chair;, S. Phokas, introduced topic;
K. Maounis, Secretary/Treasurer;C. Raptis;J. Kokarakis, Vice-Chair