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Legend: Explanations & Illustrations Rationale Note Figures & Tables Revision history

Clause 6.4 Peacetime Requirement of Ventilation Sleeves

For ventilation purposes during peacetime, at least 25% of total area of the two ventilation sleeve openings in the SS walls shall be kept uncovered.

In the case of S/C SS and scissor S/C SS, all ventilation sleeve openings shall be fully closed.