DS/EN ISO 12215-5:2018

Small craft - Hull construction and scantlings - Part 5: Design pressures for monohulls, design stresses, scantlings determination (ISO 12215-5:2008, including Amd 1:2014)

This part of ISO 12215 applies to the determination of design pressures and stresses, and to the*determination of the scantlings, including internal structural members of monohull small craft constructed from*fibre-reinforced plastics, aluminium or steel alloys, glued wood or other suitable boat building material, with a*length of hull, LH, in accordance with ISO 8666, between 2,5 m and 24 m. It only applies to boats in the intact*condition.*It only applies to craft with a maximum speed u 50 knots in mLDC conditions.*The assessment shall generally include all parts of the craft that are assumed watertight or weathertight when*assessing stability, freeboard and buoyancy in accordance with ISO 12217 and are essential to the safety of*the craft and of persons on board.*For the complete scantlings of the craft, this part of ISO 12215 is used in conjunction with Part 6, for details,*Part 7 for multihulls, Part 8 for rudders and Part 9 for appendages and rig attachment.*The scantling determination of windows, portlights, deadlights, hatches and doors, is in accordance with*ISO 12216. The structure supporting these elements is in accordance with this part of ISO 12215.*NOTE 1 – Scantlings derived from this part of ISO 12215 are primarily intended to apply to recreational craft including*recreational charter vessels and may not be suitable for performance racing craft.*NOTE 2 – This part of ISO 12215 is based on the assumption that scantlings are governed solely by local loads.*NOTE 3 – The scantling requirements of this part of ISO 12215 are considered to correspond to the minimum strength*requirements of motor and sailing craft which are operated in a safe and responsible manner, having due cognisance of*the prevailing conditions.*Pressures and stresses are normally expressed in pascals, kilopascals or megapascals. For the purposes of a*better understanding for the users of this part of ISO 12215, the pressures are expressed in kilonewtons per*square metre (1kN/m2 = 1kPa) and stresses or elastic moduli are expressed in newtons per square millimetre*(1 N/mm2 = 1 MPa).