This part of ISO 12215 applies to the determination of: the loads in rig elements, and the load and scantlings of rig attachments and mast step, on monohull and multihull sailing craft. This document is not planned to be applicable to racing craft designed only for professional racing. The scope of ISO 12215 was initially developed for craft below 24 m hull length LH, but it may be applied for craft up to 24 m load line length (see Note) and beyond, with the necessary critical mind. Scantlings derived from this International Standard are primarily intended to apply to recreational craft, including charter vessels. Throughout this document, and unless otherwise specified, dimensions are in (m), Areas in (m2), masses in kg, forces in (N), moments in (Nm), stresses and elastic modulus in (1N / mm2 = 1 Mpa). Unless otherwise stated, the craft shall be assessed in mLDC condition. NOTE The load line length is defined in the OMI "International Load Lines Convention 1966/2005", it may be larger than LH for craft with overhangs. This length also sets up, at 24 m, the lower limit of several IMO conventions.