Section 9 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 8 Container Ships - Section 9 Transverse bulkheads

Section 9 Transverse bulkheads

Parent topic: Chapter 8 Container Ships

9.1 General

9.1.1 The requirements of Pt 4, Ch 1, 9 Bulkheads are to be applied, together with the requirements of this Section.

9.1.2 Watertight transverse bulkheads may be vertically or horizontally framed.

9.1.3 The ShipRight FDA Procedure, Structural Detail Design Guide (SDDG), indicates recommended examples of structural design configurations in critical areas of transverse bulkhead structures.

9.2 Transverse watertight/non-watertight bulkhead primary supporting structure

9.2.1 The primary supporting structure of transverse bulkheads normally comprises a grillage of vertical webs and horizontal stringers/decks.

9.2.2 Vertical webs are to be fitted in line with double bottom girders.

9.2.3 The scantlings of transverse bulkhead primary structure including bulkhead plating are to be verified by direct calculations as described in Pt 4, Ch 8, 14.2 Procedures for verification of primary structure scantlings.

9.2.4 The scantlings are to be adequate for the static and dynamic loads imposed on the structure by the container stowage arrangements.

9.3 Transverse watertight bulkheads

9.3.1 The thickness of the transverse bulkhead plating is to satisfy the requirements of Pt 4, Ch 8, 9.2 Transverse watertight/non-watertight bulkhead primary supporting structure and is to be not less than required by Pt 4, Ch 1, 9.2 Watertight and deep tank bulkheads for watertight bulkheads.

9.3.2 In general, a transverse box structure or equivalent is to be arranged at upper deck level.

9.3.3 In certain cases, a transverse box structure at the inner bottom may also be required.

9.4 Transverse non-watertight mid-hold bulkheads

9.4.1 Where non-watertight bulkheads are arranged in conjunction with the double bottom mid-hold support, a transverse box is to be arranged at strength deck level.

9.4.2 Non-watertight bulkhead scantlings are to satisfy the requirements of Pt 4, Ch 8, 9.2 Transverse watertight/non-watertight bulkhead primary supporting structure and Pt 4, Ch 1, 4.4 Deck supporting structure for a non-watertight pillar bulkhead.

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