This document defines the dimensions, design local pressures, mechanical properties and design stresses for the scantlings determination of monohull small craft with a hull length (L_H) or a load line length (see NOTE 1) of up to 24 m. It considers all parts of the craft that are assumed to be watertight or weathertight when assessing stability, freeboard and buoyancy in accordance with ISO 12217.

The main core of this document determines the local design pressures and stresses for monohulls and details the possible scantlings methods derived from these pressures and stresses, both for monohulls and multihulls (see NOTE 2). The assessment process requires, where relevant, the application of Annexes.

This document is applicable to small craft, in intact condition, of the two following types:

It is not applicable to racing craft designed only for professional racing.

This document is applicable to the structures supporting windows, portlights, hatches, deadlights, and doors.

For the complete scantlings of the craft, this document is intended to be used with ISO 12215‑8 for rudders, ISO 12215‑9 for appendages and ISO 12215‑10 for rig loads and rig attachments.

This document covers small craft built from the following materials:

Throughout this document, unless otherwise specified, dimensions are in (m), areas in (m²), masses in (kg), forces in (N), moments in (N.m), pressures in kN/m² (1 kN/m² = 1  kPa), stresses and elastic modulus in N/mm² (1 N/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 that the required value is the minimum of d, e, and f.