Section 8 Transverse bulkheads
Clasification Society 2024 - Version 9.40
Clasifications Register Rules and Regulations - Rules and Regulations for the Classification of Ships, July 2022 - Part 4 Ship Structures (Ship Types) - Chapter 11 Ore Carriers - Section 8 Transverse bulkheads

Section 8 Transverse bulkheads

Parent topic: Chapter 11 Ore Carriers

8.1 General

8.1.1 Where the form of construction used for transverse bulkheads in wing tanks is different from that used in centre holds, arrangements are to be made to ensure continuity of transverse strength through the longitudinal bulkhead.

8.2 Transverse watertight bulkheads in wing tanks

8.2.1 The requirements for transverse bulkhead plating, stiffening and primary structure given in Pt 4, Ch 1, 9 Bulkheads for deep tank bulkheads are to be applied.

8.3 Transverse watertight bulkheads in centre holds

8.3.1 Scantlings are to comply with Pt 4, Ch 1, 9 Bulkheads and assessed against ore loading in accordance with Table 11.7.1 Longitudinal and transverse bulkhead scantlings for ore loading. Transverse corrugated bulkhead scantlings may be determined by direct calculations but are not to be less than required by the watertight bulkhead requirements of Pt 4, Ch 1, 9 Bulkheads.

8.3.2 For ships where the requirements of Pt 4, Ch 11, 3.1 General 3.1.2 are applicable, the requirements for transverse hold bulkheads given for the carriage of dry bulk cargoes in Pt 4, Ch 7, 10 Bulkheads are also to be applied.

8.3.3 In general, the bulkheads are to have stiffening or corrugations arranged vertically, supported by top and bottom end stools. Alternative arrangements will, however, be considered.

8.3.4 Where inner bottom plating is increased as required by Pt 4, Ch 11, 6.1 General 6.1.4, the lower part of the transverse bulkhead should also be increased in accordance with Pt 3, Ch 9, 8.4 Transverse bulkhead plating 8.4.1.

8.3.5 For vessels eligible for the notation Strengthened to carry cargoes which may liquefy (IMSBC Group A), the plate thickness of corrugated bulkheads in any cargo hold shall be determined based on differential pressure between liquefied cargo and dry cargo in the adjacent hold.

8.4 Non-watertight bulkheads

8.4.1 Non-watertight bulkheads in wing tanks are to comply with the requirements given in Pt 4, Ch 9, 8 Non-oiltight bulkheads and Pt 4, Ch 9, 9.8 Primary members supporting non-oiltight bulkheads .

8.4.2 The bulkhead plating is to be suitably reinforced in way of double bottom scarfing arrangements and the ends of centre hold deck transverses. Openings in wing tank bulkheads are to be kept clear of these areas.

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