Section 1 Introduction
Clasification Society 2024 - Version 9.40
Clasifications Register Rules and Regulations - Rules and Regulations for the Classification of Naval Ships, January 2023 - Volume 1 Ship Structures - Part 3 Design Principles and Constructional Arrangements - Chapter 4 Closing Arrangements and Outfit - Section 1 Introduction

Section 1 Introduction

Parent topic: Chapter 4 Closing Arrangements and Outfit

1.1 General

1.1.1 The requirements of this Chapter are applicable to all ship types. If required, reference should be made to the specified subdivision and stability standard(s)

1.1.2 Provisions covering acceptable arrangements for the watertight and weathertight integrity of the hull and spaces within the hull are to be read in conjunction with the limits defined in Vol 1, Pt 3, Ch 1, 1.3 Loading.

1.1.3 Requirements are given for watertight and weathertight steel hatches and doors, securing arrangements, coamings, also closing arrangements for other miscellaneous openings, ventilators, air pipes, magazine blow out plates and discharges. For side shell doors for main opening and bow doors, see Vol 1, Pt 4, Ch 3 Special Features.

1.1.4 Requirements are also given for other outfitting arrangements including protection of personnel, lagging of structure and the fixing of equipment lifting eyes.

1.1.5 A boundary or a closing appliance is considered weathertight if it is capable of preventing the passage of water into the ship in any sea condition. Weathertightness can be obtained, by design, where closing arrangements are constructed of steel (or equivalent) and are capable of being closed by clamping devices or bolts. The joining parts are to be gasketed and for all practical purposes have an equivalent structural integrity and tightness to the surrounding structure.

1.1.6 The requirements for closing appliances in this Chapter are suitable for weathertight arrangements. When closing appliances are designed to comply with the requirements for CBRN Defence, they will be considered as being equivalent to the weathertight requirements of this Chapter.

1.1.7 In general, closing arrangements and outfit should be positioned so as to avoid direct weapon recoil, blast or efflux loads however, where this is not the case, they are to be additionally examined for structural integrity and tightness when subject to the loads defined in Vol 1, Pt 4, Ch 2, 9 Military installation and operational loads as applicable.

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