Section 8 Additional requirements for double bottom structures in bulk carriers
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 1 Dry Cargo Ships - Section 8 Additional requirements for double bottom structures in bulk carriers

Section 8 Additional requirements for double bottom structures in bulk carriers

Parent topic: Chapter 1 Dry Cargo Ships

8.1 General

8.1.1 The requirements of Pt 4, Ch 1, 7 Double bottom structure are to be applied together with the requirements of Table 1.8.1 Requirements for double bottom structures in bulk carriers in this Section.

Table 1.8.1 Requirements for double bottom structures in bulk carriers

Item Parameter Requirements
(1) Inner bottom plating Thickness The greater of:
t =
t = 8,0 mm
This thickness is to be increased by 4 mm when no ceiling is fitted
(2) Girders and floors Thickness Not less than 8 mm
(3) Inner bottom longitudinals Section modulus (1) Within 0,25B on either side of centreline:
  Zl = 7,25P oksle 2 cm3
(2) Outside 0,25B from centreline:
The greater of:
(a) Z = 0,5Zl cm3
(b) Z = 4,85Hc ksle 2 cm3
Symbols

L, B, D, T, Cb, Hc, le, S, s, t, k and Z are as defined in Pt 4, Ch 1, 1.5 Symbols and definitions 1.5.1 and Table 1.7.1 Double bottom structure

r = ratio cargo compartment length, in metres/L

Note The application of higher tensile steel inner bottoms will be specially considered.

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