1. Bottom structure of the ship: such as rib plates, middle inner keel, side inner keel, and other steel structural components.
2. Side structures: such as ribs, side longitudinal girders and side plates, and other steel structural components.
3. Deck structure: such as deck slabs, beams, deck longitudinal girders, hatch panels, and other steel structural components.
4. Bulkhead structure: such as transverse bulkhead, longitudinal bulkhead, and other steel structural components.