Section 1 General
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 6 Hull Construction in Steel - Chapter 3 Scantling Determination - Section 1 General

Section 1 General

Parent topic: Chapter 3 Scantling Determination

1.1 Application

1.1.1 The requirements of this Chapter are applicable to monohull craft of steel construction as defined in Vol 1, Pt 1, Ch 2, 2 Scope of the Rules

1.1.2 All NS1, NS2 and NS3 ships as defined in Vol 1, Pt 1 Regulations are to comply with the minimum requirements of Vol 1, Pt 6, Ch 3, 2 Minimum structural requirements and general structural requirements of Sections Vol 1, Pt 6, Ch 3, 5 Shell envelope plating to Vol 1, Pt 6, Ch 3, 16 Masts.

1.1.3 The basic structural scantlings of NS1 ships are to be determined in accordance with Vol 1, Pt 6, Ch 3, 3 NS1 scantling determination and supported where necessary by direct calculations.

1.1.4 The basic structural scantlings of NS2 and NS3 ships are to be determined in accordance with Vol 1, Pt 6, Ch 3, 4 NS2 and NS3 scantling determination and supported by direct calculations where necessary.

1.2 General

1.2.1 The formulae used in this Chapter are to be used in conjunction with the design loadings from Vol 1, Pt 5 Environmental Loads and design tools in Vol 1, Pt 6, Ch 2 Design Tools to determine the rule scantling requirements.

1.2.2 All references to longitudinal locations in the rules are to be taken as forward of the aft end of L R unless otherwise stated, e.g. 0,75L R is 75 per cent of L R forward of the aft end of L R

where

L R is defined in Vol 1, Pt 3, Ch 1, 5.2 Principal particulars

1.3 Direct calculations

1.3.1 The extent of direct calculation required will depend on the ship's structural configuration and operational requirements and is to be agreed between the designer, Owner, Naval Administration and Clasifications Register (hereinafter referred to as 'LR') at an early stage in the plan approval process.

1.3.2 In addition, where the ship is of unusual design, form, proportion or has operational requirements such as very high speed, the scantlings will be specially considered and may require direct calculation.

1.4 Equivalents

1.4.1 LR will consider direct calculations for the derivation of scantlings as an alternative and equivalent to those derived by rule requirements in accordance with Vol 1, Pt 3, Ch 1, 2 Direct calculations Vol 1, Pt 3, Ch 1, 2 Direct calculations and Vol 1, Pt 3, Ch 1, 3 Equivalents.

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