Section 1 General
Clasification Society 2024 - Version 9.40
Clasifications Register Rules and Regulations - Rules for the Classification of Trimarans, July 2022 - Volume 1 Regulations and Structural Arrangements - Part 5 Environmental Loads - Chapter 5 Local Design Loads - Section 1 General

Section 1 General

Parent topic: Chapter 5 Local Design Loads

1.1 Introduction

1.1.1 This Chapter contains information regarding the derivation of local design loads that are to be used for the assessment of scantlings given in Vol 1, Pt 6, Ch 4 Local Scantling Requirements.

1.2 Application

1.2.1 The environmental conditions used for the determination of the local loads are to be based on the environmental design criteria specified in Vol 1, Pt 5, Ch 2 Environmental Conditions.

1.2.2 The formulae for ship motion loads given in this Chapter are suitable for all trimarans that operate in displacement mode. Ship motion loads for ships that operate in the fully planing mode are to be specially considered.

1.2.3 Design pressures consisting of a hydrostatic and a hydrodynamic component are to be calculated for the shell envelope, wet-deck, weather deck and inner bottom structures. Additionally, design impact pressures are to be calculated for portions of the shell envelope and wet-deck. These design pressures, calculated according to Vol 1, Pt 5, Ch 5, 3 Shell envelope, are comprised of the pressure components described in Vol 1, Pt 5, Ch 5, 2 Pressure components.

1.2.4 All remaining local structural requirements, described in Sections Vol 1, Pt 5, Ch 5, 7 Internal decks, are to be calculated according to the appropriate Complementary Rules.

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