Minimum coaming heigh

Minimum coaming height [mm] for ventilators according to LLC 66 as amended
D.2.1.5 The thickness of ventilator posts shall be at least equal to the thickness of coaming as per
D.2.1.4.
D.2.1.6 The wall thickness of ventilator posts of a clear sectional area exceeding 1600 cm2 is to be
increased according to the expected loads.
D.2.1.7 Generally, the coamings and posts shall pass through the deck and shall be welded to the
deck plating from above and below. Where coamings or posts are welded onto the deck plating, fillet
welds subject of GL Rules for Hull Structures (I-1-1), Section 19, B.3.3 shall be adopted for welding inside
and outside.
D.2.1.8 Coamings and posts particularly exposed to wash of sea are to be efficiently connected with
the ship's structure.
D.2.1.9 Coamings of a height exceeding 900 mm are to be specially strengthened.
D.2.1.10 Where the thickness of the deck plating is less than 10 mm, a doubling plate or insert plate of
10 mm thickness is to be fitted. Their side lengths are to be equal to twice the length or breadth of the
coaming.
D.2.1.11 Where beams are pierced by ventilator coamings, carlings of adequate scantlings are to be
fitted between the beams in order to maintain the strength of the deck.