scope:

This part of ISO 12215 applies to the determination of design loads, pressures, stresses, and to the
determination of the scantlings, including internal structural members of multihull small craft with a length of the hull (LH) of up to 24 m according to ISO 8666. The construction material is planned to be fibre reinforced plastics, aluminium or steel alloys, wood or other suitable boat building material. It only applies to boats in intact condition.
The assessment shall generally include all parts of the craft that are assumed watertight or weathertight when assessing stability, freeboard and buoyancy according to ISO 12217, all structural integral parts, and in addition any highly loaded areas like attachment areas of ballast keels, centreboards, rudders, chain plates, etc.
Hydrofoils are not covered in this part of 12215.