Background
Clasification Society 2024 - Version 9.40
Statutory Documents - IMO Publications and Documents - Circulars - Maritime Safety Committee - MSC/Circular.488 – Containers and Cargoes – (Adopted on 6 June 1988) - Carriage of GrainGuidance on interpretations and equivalences - 21 `Tween-deck hatch covers - Background

Background

 When bulk grain is stowed on several levels in the same cargo hold with the openings between decks closed so as to form separate compartments, it is possible for the grain to be transferred vertically from an upper level to a lower level through openings in the joints of the `tween-deck hatch covers. This change of configuration of the void spaces can generate heeling moments which were not provided for in the stability calculations.

Parent topic: 21 `Tween-deck hatch covers
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