2.1 General
This chapter covers those elements of hull and superstructure which provide longitudinal
and other primary and local strength of the craft as a whole and also other important
components such as foils which are directly associated with the structure of the craft.
2.2 Materials
Materials used for the hull and superstructure and the other features referred to in 2.1
should be adequate for the intended use of the craft.
2.3 Structural Strength
2.3.1 The structure should be capable of withstanding the static and dynamic loads which
can act on the craft under all operating conditions in which the craft is permitted to
operate, without such loading resulting in inadmissible deformation or loss of
watertightness/ weathertightness or interfering with the safe operation of the craft.
2.3.2 The static and dynamic loads referred to in 2.3.1 include all anticipated loads in
all conditions for which the craft is certified to operate, including, for example,
emergency landing fully laden in critical design conditions.
2.3.3 Craft should be designed, constructed and maintained in compliance with the
structural, mechanical and electrical requirements of a classification society which is
recognized by the Administration in accordance with regulation XI-1/1 of the Convention,
or with applicable national standards which provide an equivalent level of safety.
2.4 Cyclic Loads
Cyclic loads, including those from vibrations which can occur on the craft, should not:
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.1 impair the integrity of structure during the anticipated service life of the
craft or the service life agreed with the Administration;
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.2 hinder normal functioning of machinery and equipment; and
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.3 impair the ability of the crew to carry out its duties.
2.5 Design Criteria
The Administration should be satisfied that the choice of design conditions, design
loads and accepted safety factors corresponds to the intended operating conditions for
which certification is sought.
2.6 Trials
If the Administration considers it necessary, it should require full-scale trials to be
undertaken in which loads are determined. Cognizance should be taken of the results
where these indicate those load assumptions or structural calculations have been
inadequate.