Yacht design standards

Yacht-design-standardsFew dedicated Rules exist for sailing yacht rigs A specific section was contained in the old version of Det Norske Veritas Rules for construction and certification of vessels less than 15 metres (DNV, 1983). A similar section is presented in 1993 Bureau Veritas Rules for the classification of yachts (BV, 1993).

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Standing yacht rigging

Standing-yacht-riggingStanding rigging can be considered as a unique, balanced, structural system which should withstand loads transmitted by sails: mast and spreaders are designed to support compression stresses, stays and upwind shrouds support tension stresses. Chainplates finally distribute the shroud tension on side shell and frames.

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Loadings on mast

Loadings-on-mastsIt should be underlined that, in the last decade, significant progress has been made in the field of aerodynamic and hydrodynamic load analysis, thanks to some prestigious international competition such as the America's Cup and Admiral's Cup. Many problems related to the forces generated by sails have been faced by developing powerful numerical software able to take into account a large number of geometric and physical variables.

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The structural arrangements of sailing yachts

yacht-constructionsThe structural arrangements of sailing yachts vary significantly depending on the vessel size, its mission and the construction materials used. Small vessels less than 10 metres in length typically rely on the hull skin and deck for most of the structural support while yachts longer than 24 metres use a system of bulkheads, ring frames and longitudinals to support the skins. An inshore vessel may have no bulkheads while ocean-crossing vessels may have multiple watertight bulkheads.

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Yacht design standards and rules

yacht-design-standartThe traditional approach to designing a yacht hull structure is to use a classification society's rules such as Lloyd's Register (LR) or the American Bureau of Shipping (ABS). The International Standards Organisation (ISO) is developing a new standard (12215) that is mandatory for all boats less than 24m in length which will be sold in the European Union (mandated through CE directives). The importance of the European market to most yacht builders means that the ISO standards are becoming a universal standard.

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