Section 5 Surface Type Units

501. Application

The requirements in this Section apply to surface type units.

502. Ship type units

The hull structure is to be in accordance with the requirements in the Rules, taking account of the followings. Where, however, approved by the Society, the requirements in Rules for the Classification of Steel Ships may apply, except the requirements in Sec 3 and 4.

(1) Where large deck openings such as wells, etc. are provided, the hull structure is to be suitably reinforced and to be good in the continuity of longitudinal strength and transverse strength.

(2) The plating of the well is to be suitably stiffened to prevent damage due to other objects which may become trapped in the well.

(3) The unit's structure in way of heavy concentrated loads is to be suitably reinforced.

(4) Local structures in way of fairleads, winches, etc., forming part of the position mooring system, are to be designed to the breaking strength of the mooring line or chain.

503. Barge type units

The hull structure is to be in accordance with the requirements in this rule, taking account of the requirements in 502. Where, however, approved by the Society, the requirements in Rules for the Classification of Steel Barges may apply.