Section 2 General

201. Application

The requirements in this part are to be applied to yacht constructed in steel, aluminium or fiber composites (FRP) and satisfy relevant requirements given in Pt 1, Ch 1, 103.

202. Equivalency

1. The requirements, not defined in these rules, are to be in accordance with the Rules for Classification of Steel Ships.

2. Alternative hull construction, equipment, arrangement and scantlings are to be accepted by the Society, provided that the Society is satisfied that such construction, equipment, arrangement and scantlings are equivalent to those required in rules.

203. Direct strength calculation

1. Where approved by Society, scantlings of structure members may be determined based upon direct calculation. Where calculated scantlings based on direct calculation exceed the scantlings required in this part, the former is to be adopted.

2. Where the direct calculation specified in the Par 1 is carried out, the data necessary for the calcu- lation are to be submitted to the Society.

3. Where scantlings of structural members are determined based on the direct strength calculation,

Guidance Relating to the Rules for Classification of High Speed and Light Crafts, ANNEX 3-1 「Guidance for the Direct Strength Assessment」shall be followed. If the application of

the Guidance is considered inappropriate, analysis method, loads and allowable stress as deemed ap- propriate by the Society may be applied.

4. Based on the results according to the direct strength calculation, the buckling strength of the struc- tural members are to be examined by using the method and allowable stress given in Guidance Relating to the Rules for Classification of High Speed and Light Crafts, ANNEX 3-2

「Guidance for the Buckling Strength Calculation」.