Section 7 Small hatchways
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 7 Small hatchways

Section 7 Small hatchways

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

7.1 General

7.1.1 This Section applies to small hatchways to dry spaces with a length and width less than 3 m.

7.1.2 If small hatchways are to be used as emergency exits they shall have a clear opening of not less than 0,36 m2, and the smallest dimension shall be not less than 0,50 m.

7.2 Construction of coamings

7.2.1 The thickness of the hatch coaming is to be not less than the Rule thickness of the deck around the hatch. When the height of the coaming exceeds 300 mm the upper edge of the coaming is to be stiffened and the coaming may need to be supported by brackets or stays to the deck. Where the height of the coaming plate exceeds the spacing of the deck beams, the thickness of the coaming plate is to be increased or additionally stiffened.

7.3 Hatch covers

7.3.1 Hatch covers on hatches for access to dry spaces may be constructed of steel, aluminium or wood. The scantlings of these covers are to comply with the requirements of Pt 3, Ch 11, 2 Self-supporting steel hatch covers, Pt 3, Ch 11, 3 Self-supporting aluminium hatch covers or Pt 3, Ch 11, 4 Portable wood, steel or aluminium covers with portable beams, whichever is applicable. The edges of the covers are to be adequately stiffened.

7.3.2 Hatch covers are to be weathertight. The securing arrangements are to be adequate to ensure the weathertightness. Escape hatches are to be capable of being opened from either side.

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