IACS harmonised CSR


Paper boatsRussian Maritime Register of Shipping (RS) would like to advise of harmonised CSR for Bulk Carriers and Oil Tankers enforcement on 1st July 2015, which will supersede the current Common Structural Rules for Double Hull Oil Tankers and Common Structural Rules for Bulk Carriers (Part XVIII and Part XIX of RS Rules for the Classification and Construction of Sea-Going Ships). The harmonised Rules will be inalterably included in the normative documents of all IACS members, RS included.

The requirements of the new Rules will cover bulk carriers of unrestricted service, single or double hull, 90m in length and upwards and double-hull oil tankers of unrestricted service, 150m in length and upwards. The text of the Rules can be found on the IACS official website in the Section “Publications”.

Traditionally, IACS documents are so developed that the Technical Background Rule Reference (also placed on the website) is an indispensible part of the Rules. The Reference contains comments practically on every paragraph of the developed requirements, explains the essence of the requirement, quotes its source (IACS Unified Requirement, statutory requirement, requirement of a particular Classification Society, etc.). For the most essential requirements, Technical Background Reports are issued as separate documents forming an indispensible part of the Rules, which contain a feasibility study. The Reports include detailed justification of requirements, data, calculation examples and descriptions of applied techniques.

To ensure a flexible implementation procedure for the requirements of the new Rules, the IACS Knowledge Centre is in operation, an information resource where one can obtain explanations concerning particular requirements of the Rules in the question-answer mode. Questions may be put directly to the IACS Permanent Secretariat or to Russian Maritime Register of Shipping, namely, by electronic mail to the address of the RS Research Department research.dept@rs-class.org.

The requirements of the new Rules cover the largest segment of the world’s merchant fleet. In this connection, one of the main tasks of IACS during their development was to avoid the reduction of hull scantling requirements as compared to ships in service, on one part, and the groundless requirement toughening, on the other, which may potentially involve a weight increment for steel hulls. To this end, a working group of IACS made comparative calculations of required hull scantlings for a representative selection of ships to cover the types and sizes of oil tankers (deadweight between 50,000 and 320 ,000 tons) and bulk carriers (deadweight between 56,000 and 205,000 tons) most popular in the market. Relevant calculation data are generalized in the Consequence Assessment Reports and placed on the IACS website.