Section 5 Shell envelope plating

5.1.1 The requirements of Pt 4, Ch 1, 5 Shell envelope plating are to be applied, together with the requirements of this Section.

5.1.2 The bottom shell is, in general, to be longitudinally framed for ships where L > = 100 m.

5.1.3 The side shell may be longitudinal or transversely framed, except in way of the topside torsion box which is, in general, to be longitudinally framed.

5.2.1 The thickness of the bottom shell plating is to satisfy the requirements of Pt 4, Ch 8, 3 Longitudinal strength and Pt 4, Ch 8, 7.2 Double bottom primary supporting structure and is to be not less than required by Pt 4, Ch 1, 5.3 Bottom shell and bilge.

5.2.2 In regions where transverse framing is adopted, particularly towards the end of the ship, the buckling stability of the plating will be specially considered.

5.3.1 The thickness of the side shell and sheerstrake plating is to satisfy the requirements of Pt 4, Ch 8, 3 Longitudinal strength and Pt 4, Ch 8, 6.2 Side shell primary supporting structure and is to be not less than required by Pt 4, Ch 1, 5.4 Side shell.

5.3.2 At positions where high shear forces are present, local increases in thickness may be required.

5.3.3 The difference in thickness between the sheerstrake and shell plating below is not to exceed 25 mm.