Chapter 3:

ship structure


CHAPTER SUMMARY
Chapter 3 includes provisions to ensure that the material and scantlings of ships with or without ice strengthening retain their structural integrity under certain environmental loads and conditions. This chapter seeks to provide assurance that a ship’s structure is suitable for the environmental conditions (e.g. ice loads and temperature) by requiring that a ship’s design plan be made to a recognized standard, such as the Polar Class or the Finnish-Swedish (Baltic) classes, and that materials be suitable if the vessel operate at low temperatures. These are clearly set out in the Chapter 3 wording below, and in the Part 1B Additional Guidance.


SUBMISSIONS


CHAPTER 3 – SHIP STRUCTURE:
Full Polar Code text
As adopted from IMO - Full Polar Code text

3.1 Goal

The goal of this chapter is to provide that the material and scantlings of the structure retain their structural integrity based on global and local response due to environmental loads and conditions.

3.2 Functional requirements
In order to achieve the goal set out in paragraph 3.1 above, the following functional requirements are embodied in the regulations of this chapter:
  • .1 for ships intended to operate in low air temperature, materials used shall be suitable for operation at the ships polar service temperature; and
  • .2 in ice strengthened ships, the structure of the ship shall be designed to resist both global and local structural loads anticipated under the foreseen ice conditions.
3.3 Regulations
  • 3.3.1 In order to comply with the functional requirements of paragraph 3.2.1 above, materials of exposed structures in ships shall be approved by the Administration, or a recognized organization accepted by it, taking into account standards acceptable to the Organization or other standards offering an equivalent level of safety based on the polar service temperature.
  • 3.3.2 In order to comply with the functional requirements of paragraph 3.2.2 above, the following apply:
    • .1 scantlings of category A ships shall be approved by the Administration, or a recognized organization accepted by it, taking into account standards acceptable to the Organization or other standards offering an equivalent level of safety;
    • .2 scantlings of category B ships shall be approved by the Administration, or a recognized organization accepted by it, taking into account standards acceptable to the Organization or other standards offering an equivalent level of safety;
    • .3 scantlings of ice strengthened category C ships shall be approved by the Administration, or a recognized organization accepted by it, taking into account acceptable standards adequate for the ice types and concentrations encountered in the area of operation; and
    • .4 a category C ship need not be ice strengthened if, in the opinion of the Administration, the ship's structure is adequate for its intended operation.

 

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POLAR CODE CHAPTERS:
EXPLANATION AND SUBMISSIONS







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