Section 6 Hatch cover securing arrangements and tarpaulins
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 11 Closing Arrangements to Openings in Shell and Deck, Ventilators, Air Pipes, Sounding Pipes and Discharges - Section 6 Hatch cover securing arrangements and tarpaulins

Section 6 Hatch cover securing arrangements and tarpaulins

Parent topic: Chapter 11 Closing Arrangements to Openings in Shell and Deck, Ventilators, Air Pipes, Sounding Pipes and Discharges

6.1 Securing arrangements

6.1.1 Hatch covers are to be provided with securing arrangements to prevent undue movement of the covers, and to ensure suitable compression of the gasket if fitted. When toggles are fitted to ensure compression of the gasket, their number and spacing will be considered in relation to the rigidity of the hatch cover.

6.1.2 Toggles to cargo tank hatch covers are generally to be spaced not more than 450 mm apart, but the number and size are to be commensurate with the loads imposed upon them. When the cover is provided with suitable additional stiffening, the number of toggles may be reduced.

6.1.3 Hinges are not to be used for sealing arrangements unless they are adjustable in height.

6.1.4 On non-adjustable hinges the holes for the bolts are to be slotted in order to provide adequate vertical clearance in way to ensure equal packing pressure over the entire hatch by the toggles.

6.2 Tarpaulins

6.2.1 Where tarpaulins are fitted to make hatch covers weathertight, they are to be of ample strength and waterproof. Tarpaulins are to be secured by battens and wedges or equivalent arrangements.

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