UNE-EN ISO 12215-5:2020

This part of ISO 12215 .applies to the scantlings determination of small craft with a hull length (LH) orLoad line length (see Note) up to 24 m, and in intact condition:¾ð Its main core determines the local design pressures and stresses on monohull small craft and gives apanel of assessment methods.¾ð Its Annexes gives various possible methods to determine the scantlings of plating and stiffeners, bothfor monohulls and multihulls. Local pressures and stresses for multihulls are defined in ISO 12215-7.It applies to small craft built from the following material¾ð fibre-reinforced plastics, either in single skin or sandwich construction;¾ð aluminium or steel alloys;¾ð glued wood or plywood (single skin or sandwich), excluding traditional wood construction;¾ð non reinforced plastics less than 6 m , using Annex D.It applies to the following types of small craft:¾ð recreational craft including recreational charter vessels;¾ð other small craft for professional use (workboats),using clause 12 and Annex J.It is not planned to be applicable to racing craft designed only for professional racing.The assessment includes all parts of the craft that are assumed watertight or weathertight when assessingstability, freeboard and buoyancy in accordance with ISO 12217.The scantling determination of windows, portlights, deadlights, hatches and doors, covered by ISO 12216,is excluded, but the structure supporting these elements shall be in accordance with this part ofISO 12215.For the complete scantlings of the craft, this part of ISO 12215 shall be used, where relevant with Part 8for rudders, Part 9 for appendages and Part 10 for rig loads and rig attachment.Throughout this document, and unless otherwise specified, dimensions are in (m), Areas in (m²), massesin kg, forces in (N), moments in (Nm), Pressures in kN/m² (1kN/m²=1 kPa), stresses and elastic modulusin N/mm² (1N/mm²=1 Mpa). Max (a;b;c) means that the required value is the maximum of a, b, and c,and min(d;e;f) means the minimum of d, e, and f.NOTE The load line length is defined in the OMI "International Load Lines Convention 1966/2005", it may belarger than LH for craft with overhangs. This length also sets up, at 24 m, the lower limit of several IMO conventions.