CONNECTION DIAPHRAGM USING POROUS DOUBLE LIGHTWEIGHT PANEL

A gangway connection includes an outer connection and an inner connection. The outer connection has first and second outer layers. The first and second outer layers are spaced apart from each other and overlap with each other. The inner connection is disposed inside of the outer connection, and has first and second inner layers. The first and second inner layers are spaced apart from each other and overlap with each other. A plurality of first U-shape cross-sections is connected with each other in the first outer layer, and a central portion of each of the first U-shape cross-sections is protruded outwardly. A plurality of second U-shape cross-sections is connected with each other in the second outer layer, and a central portion of each of the second U-shape cross-sections is protruded outwardly. A plurality of third U-shape cross-sections is connected with each other in the first inner layer, and a central portion of each of the third U-shape cross-sections is protruded inwardly. A plurality of fourth U-shape cross-sections is connected with each other in the second inner layer, and a central portion of each of the fourth U-shape cross-sections is protruded inwardly.