Small craft. Hull construction and scantlings. Design pressures for monohulls, design stresses, scantlings determination
47.080 - Small craft
FprEN ISO 12215-5
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 (LH) or a load line length (see
of up to
It considers all parts of the craft that are assumed to be
watertight or weathertight when assessing stability, freeboard and
buoyancy in accordance with ISOÃƒÆ’Ã¢â‚¬Å¡Ãƒâ€šÃ‚Â 12217.
The load line length is defined in the IMO "International Load
Lines Convention 1966/2005", it can be larger than
H for craft with overhangs. This length also sets up
the lower limit of several IMO conventions.
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
The assessment process requires, where relevant, the application of
This document is applicable to small craft, in intact condition,
of the two following types:
recreational craft, including recreational charter
small commercial craft and workboats, see
ClauseÃƒÆ’Ã¢â‚¬Å¡Ãƒâ€šÃ‚Â 12 and
It is not applicable to racing craft designed only for
Local pressures and stresses for multihulls are given in
ISOÃƒÆ’Ã¢â‚¬Å¡Ãƒâ€šÃ‚Â 12215-7 .
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 ISOÃƒÆ’Ã¢â‚¬Å¡Ãƒâ€šÃ‚Â 12215-8for
rudders, ISOÃƒÆ’Ã¢â‚¬Å¡Ãƒâ€šÃ‚Â 12215-9for
appendages and ISOÃƒÆ’Ã¢â‚¬Å¡Ãƒâ€šÃ‚Â 12215-10for
rig loads and rig attachments.
This document covers small craft built from the following
fibre-reinforced plastics, either in single skin or sandwich
aluminium or steel alloys;
glued wood or plywood (single skin or sandwich), excluding
traditional wood construction;
non-reinforced plastics for craft with a hull length less
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(1ÃƒÆ’Ã¢â‚¬Å¡Ãƒâ€šÃ‚Â kN/m2ÃƒÆ’Ã¢â‚¬Å¡Ãƒâ€šÃ‚Â =ÃƒÆ’Ã¢â‚¬Å¡Ãƒâ€šÃ‚Â 1ÃƒÆ’Ã¢â‚¬Å¡Ãƒâ€šÃ‚Â ÃƒÆ’Ã¢â‚¬Å¡Ãƒâ€šÃ‚Â kPa),
stresses and elastic modulus in N/mm2(1ÃƒÆ’Ã¢â‚¬Å¡Ãƒâ€šÃ‚Â N/mm2ÃƒÆ’Ã¢â‚¬Å¡Ãƒâ€šÃ‚Â =ÃƒÆ’Ã¢â‚¬Å¡Ãƒâ€šÃ‚Â 1ÃƒÆ’Ã¢â‚¬Å¡Ãƒâ€šÃ‚Â 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.
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