2 Rule Application

2.1 Rule description

2.1.1 Rule structure

The rules contain 2 parts:

Part 1: General hull requirements.
Part 2: Ship types.

The parts are structured in chapters giving instructions for detail application and requirements which are applied in order to satisfy the rule objectives.

2.1.2 Numbering

The system of numbering is given in Table 1.

Table 1 : Rule numbering and abbreviations

Order	Levels	Example	Abbreviations
1	Part	Part 1 – General Hull Requirements	Pt 1
2	Chapter	Chapter 1 – Rule General Principle	Ch 1
3	Section	Section 1 – Application	Sec 1
4	Article	1. Scope of Application	[1]
5	Sub-article	1.1 General	[1.1]
6	Requirements	1.1.1 These Rules apply to...	[1.1.1]

2.2 Rule Requirements

2.2.1 Part 1

Part 1 of the Rules provides requirements common to all ship types as follow:

Chapter 1: Rule General Principles.
Chapter 2: General Arrangement Design.
Chapter 3: Structural Design Principles.
Chapter 4: Loads.
Chapter 5: Hull Girder Strength.
Chapter 6: Hull Local Scantling.
Chapter 7: Direct Strength Analysis.
Chapter 8: Buckling.
Chapter 9: Fatigue.
Chapter 10: Other Structure.
Chapter 11: Superstructure, Deckhouses and Hull Outfitting.
Chapter 12: Construction.
Chapter 13: Ship in Operation - Renewal Criteria.

The provisions of the Ch 1, 2, 3, 4, 5, 6, 8, 12, 13 and Ch 10, Sec 4 are applicable all over the ships length. The Ch 7, 9, 10 and 11 define their own scope of application.

2.2.2 Part 2

Part 2 of the Rules provides requirements coming in addition to those of Part 1 specific for ship types and is divided as follow:

Chapter 1: Bulk Carriers.
Chapter 2: Oil Tankers.

2.2.3 Application of the Rules

The ship arrangement and scantlings are to comply with the relevant parts and chapters of the Rules as it is given in Figure 4.

Figure 4 : Application of the Rules

2.2.4 General criteria

The ship arrangement, the proposed details and the offered scantling in net or gross, as the case may, are to comply with the requirements and the minimum scantling given in the Rules.

2.3 Structural requirements

2.3.1 Materials and welding

The Rules applies to welded hull structures made of steel having characteristics complying with requirements in Ch 3, Sec 1. The Rules applies also to welded steel ships in which parts of the hull, such as superstructures or small hatch covers, are built in material other than steel, complying with requirements in Ch 3, Sec 1.

Ships whose hull materials are different than those given in the first paragraph are to be individually considered by the Society, on the basis of the principles and criteria adopted in the present rules.

2.4 Ship parts

2.4.1 General

For the purpose of application of the present rules, the ship is considered as divided into the following five parts:

Fore part.
Cargo hold region.
Machinery space.
Aft part.
Superstructures and deckhouses.

2.4.2 Fore part

The fore part is that part of the ship located forward of the collision bulkhead, i.e.:

The fore peak structures.
The stem.

2.4.3 Cargo hold region

The cargo hold region is the part of the ship that contains cargo holds, cargo tanks, and slop tanks. It includes the full breadth and depth of the ship, the collision bulkhead and the transverse bulkhead at its aft end. The cargo hold region does not include the pump room, if any.

2.4.4 Machinery space

The machinery space is the part of the ship between the aft peak bulkhead and the transverse bulkhead at the aft end of the cargo hold region and includes the pump room, if any.

2.4.5 Aft part

The aft part includes the structures located aft of the aft peak bulkhead.

2.4.6 Superstructures and deckhouses

superstructure is a decked structure on the freeboard deck extending from side to side of the ship or with the side plating not being inboard of the shell plating more than 0.04 B.

A deckhouse is a decked structure on the freeboard or superstructure deck which does not comply with the definition of a superstructure.

2.5 Limits of application to lifting appliances

2.5.1 Definition

The fixed parts of lifting appliances, considered as an integral part of the hull, are the structures permanently connected by welding to the ship’s hull (for instance, crane pedestals, masts, king posts, derrick heel seatings, etc, excluding cranes, derrick booms, ropes, rigging accessories, and, generally, any removable parts), only for that part directly interacting with the hull structure.

2.5.2 Rule application for lifting appliances

The fixed parts of lifting appliances and their connections to the ship’s structure may be covered by the Society’s rules for lifting appliances, and/or by the certification (especially the issuance of the Register of ship’s lifting appliances and cargo handling gear) of lifting appliances when required.

2.5.3 Structures supporting fixed lifting appliances

The design of the structure supporting fixed lifting appliances and the structure that might be called to support a mobile appliance is to be designed taking into account the additional loads that may be imposed on them by the operation of the appliance and environmental conditions as declared by the builder or its sub-contractors.

2.6 Novel designs

2.6.1 Ships with novel features or unusual hull design are to comply with Ch 1, Sec 3, [6.2].