The layout of the ocean deck:
The long sides of the ocean deck are arranged along the length of the ship and parallel to the centerline of the deck. Because the deck side board needs to maintain a certain width, it is in the shape of a broken line along the gunwale. At the fore and aft ends, as the width of the deck is reduced, the number of deck plates should be reduced accordingly, and the steel plates can also be arranged horizontally. For the sake of beauty, the central row of overtime should be arranged along the length of the ship to keep the same width. When making a decision, usually arrange the deck side panels and the central row of plates first, and then arrange them from the center line to both sides, striving to make the rows of plates on both sides symmetrical. In addition, steel plates can also be arranged horizontally between the large openings.
The end seams of the marine deck should not be set at the four corners of the large opening, because this is a stress concentration area, and the distance between the plate seal and the transverse end of the hatch should be at least 500mm, and the arc radius of the corner of the opening should be allowed. In addition, when arranging the deck plates, attention should be paid to the positions of the upper and lower members of the deck to avoid overlapping or too close to the weld seams of these members. Generally, the distance between the two is required to be greater than 50mm.
Force action:
The deck plate mainly bears the following various forces:
(1) Longitudinal bending-the upper deck is the upper wing plate of the ship beam, which bears the longitudinal bending stress.
(2) Lateral load-the upper deck bears water pressure or deck cargo load and deck mechanical forces, etc. The load on the lower deck and platform and other non-weather decks depends on the use of the deck.