Deck arrangement tank structure, fixed installation method and inspection method of ship and tank

摘要

The deck arrangement tank structure 1A includes a plurality of saddles 3, a grid member 4, a plurality of support portions 5A, a tank 6A, an upper cover 22, and a plurality of lower covers ( 23). The plurality of saddles 3 are provided at intervals so as to protrude from the deck of the ship. The grid member 4 is supported from below by a plurality of saddles 3, and forms a grid shape in plan view. The plurality of support portions 5A are disposed on the upper surface of the grid member 4. The tank 6 is supported from below by a plurality of support portions 5A, and liquefied gas is accommodated therein. The upper cover 22 is supported by the lattice material, and covers the side and upper sides of the tank. The plurality of lower covers 23 are attached so as to close the grid-like openings 4a of the grid member 4 to form a closed space together with the upper cover 22.