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November 24, 2015updated 10 Mar 2022 7:42am

ClassNK announces draft amendments to its guideline for container carriers

Japan-based ship classification society ClassNK has published draft amendments to its rules and guidance for container carriers.

Japan-based ship classification society ClassNK has published draft amendments to its rules and guidance for container carriers.

The move follows the release of ClassNK’s report and the action plan on Structural Safety of Large Container Ships as discovered by the Investigative Panel on Large Container Ship Safety, which was established as a response to a large container ship casualty in June 2013.

Approved by the ClassNK Technical Committee, comprising of representatives from the shipping and shipbuilding industries as well as scholars and experts, the amendments are based on the International Association of Classification Societies (IACS) Newly approved Unified Requirements (UR S11A) and S34.

“The new standards adopted by IACS will primarily address bi-axial stresses, the whipping effect on containerships, and a revised wave bending magnitude and longitudinal distribution.”

The new standards adopted by IACS will primarily address bi-axial stresses, the whipping effect on containerships, and a revised wave bending magnitude and longitudinal distribution.

Moreover, the UR will set consistent requirements among IACS members for defining the unified minimum load cases used when conducting strength assessment of containerships by finite element (FE) analysis.

Subject to approval from ClassNK’s board of directors, the new guidelines are scheduled to apply to container ships that will be contracted for construction on or after 1 April 2016.

Japan’s Ministry of Land, Infrastructure, Transport and Tourism (MLIT) Committee on Large Container Ship Safety has released new regulations for large container ships in its Final Report in March.

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