Section 8 Side shell framing in way of cargo compartment space
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 5 Tankers of Type G - Section 8 Side shell framing in way of cargo compartment space

Section 8 Side shell framing in way of cargo compartment space

Parent topic: Chapter 5 Tankers of Type G

8.1 General

8.1.1 This Section covers the arrangements and requirements for side shell transverse and longitudinal framing.

8.1.2 The scantlings required are based on end connections in accordance with Pt 3, Ch 10, 3 Secondary member end connections. Where brackets having arm lengths differing from the standard are fitted, the modulus of the stiffening member is to be corrected in accordance with Pt 3, Ch 10, 3.7 Correction of stiffening member modulus in relation to end connections.

8.1.3 The width of a double skin, where fitted, is not to be less than 0,80 m.

8.1.4 Care is to be taken to maintain adequate transverse strength in way of the side compartments.

8.2 Transverse framing

8.2.1 The scantlings of the side framing are to comply with Table 5.8.1 Side shell framing.

Table 5.8.1 Side shell framing

Item Parameter Requirements
Transverse framing
Side frames Modulus Z = 7skle2 hf cm3
Side frames of combination   Z = 7sle2 hf cm3
System (bottom and deck longitudinally framed and sides transversely framed) Modulus See Note
Longitudinal framing
Side shell longitudinals Modulus Z = (4,6 + 0,0342L1)ksle2 hf cm3
Side transverses Modulus Z = 10kS le2 hf cm3
Transversely and longitudinally framed ships
Web frames in way of floors/transverses of bottom structure
supporting the cargo tanks 		Web depth The greater of:
  0,1D mm
  300 mm
   
Modulus Z = 40kS le 2 cm3
Symbols
L, D, T, S, s, le, k, and Z are as defined in Pt 4, Ch 5, 1.10 Symbols and definitions 1.10.1
hf = h de + h t but not less than 2,0 m
hde = the vertical distance of the stiffening member under consideration to the deck at side
ht = 0 for void spaces, or
0,50 m for deeptanks
but not less than the actual distance of the top of the overflow above deck
L1 = L but is to be taken not less than 40 m, nor more than 100 m
W = weight of tanks with maximum weight of cargo supported by the combination of floors, in tonnes
NOTE
The section modulus of side frames in way of bottom and deck transverses is to be increased by 100 %.

8.2.2 Web frames are to be fitted at every floor of the bottom structure supporting the cargo tanks.

8.3 Longitudinal framing

8.3.1 The scantlings of the longitudinal framing are to comply with Table 5.8.1 Side shell framing.

8.3.2 Side transverses are to be arranged in line with bottom and deck transverses to form a ring system for support of the side longitudinals.

8.3.3 Web frames are to be fitted at every floor of the bottom structure supporting the cargo tanks.

8.4 Reinforcement of single skin side shell

8.4.1 For ADN related structural requirements regarding minimum structural requirements for single skin sideshell structures, see Pt 4, Ch 4, 3.5 Special requirements for Type G tankers.

8.4.2 The depth of the web frames and stringers is to be at least twice the depth of the slot cut for longitudinal or transverse frames.

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.