Section 2 Minimum thickness requirements

2.1.1 The thickness of plating and stiffeners determined from the Rule scantling requirements is in no case to be less than that given in Table 3.2.1 Minimum thickness requirements for the craft type.

2.1.2 In addition, where plating contributes to the global strength of the craft, the thickness is to be not less than that required to satisfy the global strength requirements detailed in Pt 6, Ch 6 Hull Girder Strength.

2.2.1 The minimum thicknesses given in Table 3.2.1 Minimum thickness requirements are based on the assumption that there is negligible loss in strength by corrosion. Where this is not the case the minimum thickness will be specially considered.

2.3.1 Due consideration is to be given to the scantlings of all structure which may be subject to local impact loadings. Impact testing may be required to be carried out at the discretion of LR to demonstrate the suitability of the proposed scantlings for a particular application.

2.4.1 Areas of shell and deck which are subject to additional wear by abrasion, e.g. from passenger routes, working areas of fishing vessels, forefoot region etc. are to be suitably protected by local reinforcement or sheathing. This sheathing may be of timber, rubber, steel, additional layers of reinforcement, etc. as appropriate. Details of such sheathing and the method of attachment are to be submitted for consideration.

2.4.2 The attachment of sheathing by mechanical means such as bolting or other methods is not to impair the watertight integrity of the craft. Through bolting of the hull is to be kept to a minimum and avoided where practicable. The design arrangements in way of any through bolting are to be such that damage to the sheathing will not impair the watertight integrity of the hull.

2.5.1 The minimum plating thickness of craft intended for operation in ice conditions is to comply with Pt 6, Ch 5, 7 Strengthening requirements for navigation in ice conditions.