Section 5 Double bottom structure

Clasification Society 2024 - Version 9.40

Clasifications Register Rules and Regulations - Rules and Regulations for the Classification of Inland Waterways Ships, July 2022 - Part 4 Ship Structures (Ship Types) - Chapter 2 Ferries and Roll on-Roll off Ships - Section 5 Double bottom structure

Section 5 Double bottom structure

5.1 General

5.1.1 The requirements of Pt 4, Ch 1, 7 Double bottom structure are to be applied together with the requirements of this Section.

5.1.2 Where the tank top is to be used for the carriage of wheeled vehicles, the depth of the double bottom is to be at least 650 mm and the space is to be accessible. The minimum thickness of floors and inner bottom longitudinals is to be 7 mm and the inner bottom plating and bottom structure is also to comply with the requirements ofPt 3, Ch 9, 2 Decks loaded by wheeled vehicles.

5.2 Floors

5.2.1 Where floors support point loads, with or without the addition of uniformly distributed loads, the required section modulus and shear area are to be verified by direct calculation. For permissible stresses, see Pt 4, Ch 2, 7 Direct calculation procedures.

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