Section 2 Information required

2.1.1 Sufficient plans and supporting data are to be submitted to enable the design of the structure to be assessed. The plans are also to be suitable for use during construction, survey and inspection/maintenance of the unit.

2.1.2 Plans are to be submitted in triplicate, but generally only one copy of supporting design documentation and calculations is required. Plans and supporting documentation should be submitted and approved prior to commencement of construction.

2.1.3 Plans are to contain all necessary information fully to define the structure, including construction details, materials, welding and loads imposed on the structure by equipment and systems, as appropriate.

2.1.4 A copy of the Construction Booklet, Operations Manual and In-Service Inspection Plan must be submitted for class approval, incorporating the final approved revisions of relevant plans and documentation, see Pt 1, Ch 3, 1.6 Planned survey programme and Pt 3, Ch 1 General Requirements for Offshore Units.

2.1.5 Plans are to include information related to the renewal thickness as specified in Pt 10, Ch 1, 13 Steel renewal criteria.

2.2.1 In general, plans covering the following items are to be submitted:

1. main scantling plans:
   • midship section showing longitudinal and transverse structural members;
   • construction profiles/plans showing all main longitudinal structural elements along the unit's length;
   • shell expansion;
   • main oil-tight and watertight transverse bulkheads including primary support members.
2. loading guidance information:
   • preliminary loading manual;
   • final loading manual;
   • details of the design basis;
   • test conditions for the loading instrument.
3. detailed construction plans:
   • cargo tank construction plans showing the variations in detail arrangements and scantlings of transverse primary support members;
   • fore end;
   • aft end;
   • machinery spaces;
   • deck-houses and superstructures;
   • helideck;
   • ice strengthening;
   • materials and grades;
   • plans showing the proposed fatigue factors of safety for each part of the structure.
4. detail design plans, except where the information is already included on plans listed in Pt 10, Ch 1, 2.2 Plans and supporting calculations 2.2.1 and Pt 10, Ch 1, 2.2 Plans and supporting calculations 2.2.1:
   • hull penetration plans;
   • welding;
   • bilge keels;
   • booklet of standard design details;
   • pillar and girder support arrangements for decks;
   • access arrangements;
   • details and arrangements of openings and attachments to the hull structure for means of access for inspection/maintenance purposes.
5. plans detailing support structures, except where the information is already included on plans listed in Pt 10, Ch 1, 2.2 Plans and supporting calculations 2.2.1 to Pt 10, Ch 1, 2.2 Plans and supporting calculations 2.2.1:
   • masts, derrick posts, cranes and crane pedestals, flare towers and heavy equipment;
   • towing equipment;
   • other deck equipment or fittings;
   • machinery seatings;
   • riser support structures;
   • rudder stock, tiller and steering nozzles;
   • stern frame and propeller brackets.
6. The following supporting documents are to be submitted:
   • general arrangement;
   • capacity plan;
   • lines plan or equivalent;
   • dry-docking plan, where developed;
   • freeboard plan or equivalent, showing freeboards and items relative to the conditions of assignment;
   • corrosion control scheme;
   • towing and anchoring arrangements;
   • watertight subdivision;
   • welding procedures.

Plans are to indicate the new-building and renewal thickness for each structural item.