| 摘要 |
PURPOSE:To make a free surface of a bulk cargo inside a hold smaller, preventing it from rocking, as well as utilize each empty space at lower corners of the hold as a ballast tank, by forming an upper deck into an inclined form to ward both side platings from the hold central hatch. CONSTITUTION:An upper deck 15 is formed into an inclined form toward a side plating 3 from the hatch installed in the center of a hold 13. A tilt angle in the upper deck is more than 30 deg., that is, it is the almost the same as that in an upper inside plate for forming the conventional top side tank, whereby a free surface of a bulk cargo in the hold 13 is made smaller, thereby preventing it form rocking. An empty space part to be formed in a gap with a bottom plate 4 by a hopper due to lower inside plates 7-10 is utilized as a ballast tank. An inboard space loss is eliminated, and a rock of bulk cargoes is kept back by one sheet of the upper deck, thus the whole structure is simplifiable in this method. |
