Section 4 Hull section modulus
Clasification Society 2024 - Version 9.40
Clasifications Register Rules and Regulations - Rules and Regulations for the Classification of Inland Waterways Ships, July 2022 - Part 3 Ship Structures (General) - Chapter 4 Longitudinal Strength - Section 4 Hull section modulus

Section 4 Hull section modulus

Parent topic: Chapter 4 Longitudinal Strength

4.1 General

4.1.1 The hull section modulus required over 0,5L amidships is to be determined from the design bending moments, sagging or hogging, see Pt 3, Ch 4, 5 Design bending moments, considering the additional wave bending moment in Pt 3, Ch 4, 6.2 Design vertical wave bending moments in association with a permissible stress as indicated in Pt 3, Ch 4, 6.5 Permissible hull vertical bending stresses.

4.1.2 The calculation of the actual hull section modulus is to comply with the requirements of Pt 3, Ch 3, 3.4 Calculation of hull section modulus.

4.1.3 Outside 0,5L amidships, as a minimum, hull girder bending strength checks are to be carried out at the following locations:
  1. In way of the forward end of the engine room.
  2. In way of the forward end of the foremost cargo hold.
  3. At any locations where there are significant changes in hull cross-section.
  4. At any locations where there are changes in the framing system.
Copyright 2022 Clasifications Register Group Limited, International Maritime Organization, International Labour Organization or Maritime and Coastguard Agency. All rights reserved. Clasifications Register Group Limited, its affiliates and subsidiaries and their respective officers, employees or agents are, individually and collectively, referred to in this clause as 'Clasifications Register'. Clasifications Register assumes no responsibility and shall not be liable to any person for any loss, damage or expense caused by reliance on the information or advice in this document or howsoever provided, unless that person has signed a contract with the relevant Clasifications Register entity for the provision of this information or advice and in that case any responsibility or liability is exclusively on the terms and conditions set out in that contract.