Section 3 Chain plates
Clasification Society 2024 - Version 9.40
Clasifications Register Rules and Regulations - Rules and Regulations for the Classification of Special Service Craft, July 2022 - Part 4 Additional Requirements for Yachts - Chapter 3 Special Considerations for Sailing Yachts - Section 3 Chain plates

Section 3 Chain plates

Parent topic: Chapter 3 Special Considerations for Sailing Yachts

3.1 General

3.1.1 Chain plates and other securing arrangements to take the loads of all standing rigging for masts and bowsprits, are to be of substantial construction and well integrated with the hull and/or deck supporting structure. They are to be of sufficient strength that, in the event of failure of the standing rigging, the watertight integrity of the hull is not impaired.

3.1.2 The breaking loads of all mast and bowsprit standing rigging together with the actual loads imposed by the rigging are to be submitted.

3.2 Calculations

3.2.1 The strength of any part of chainplates or structure to which it is attached is not to be less than the breaking load of the rigging to which it is attached or 2,5 times the maximum working load of the rigging, whichever is the lesser and to that load subject to the following factors of safety (FOS)

Items: Minimum FOS:
Rigging 1,0
Lug, eyebolt eye 1,2
Lug to baseplate 1,2
Eyebolt/base plate to foundation 2,0
Chainplate to foundation (below decks) 2,0
Chainplate foundation to hull structure 2,0
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