Patent ID: 6009821
Filing Date: 2000-01-04
Classification: B63B,Y02T

Abstract:
A method of providing a second bottom to a cargo hold in a steel hull ship, said second bottom being supported without a steel structure, the method comprising:a) applying a first layer of sand to the bottom of the ship's cargo hold over an area that is to be covered by a second bottom;b) compacting the first layer of sand;c) applying one or more additional layers of sand to the first layer of compacted sand;d) separately compacting each of the one or more additional layers of sand after the layer has been applied;e) applying a layer of reinforced concrete to the uppermost layer of compacted sand;f) placing one or more steel plates on top of the cured layer of reinforced concrete and in abutting relationship with the side walls of the cargo hold, and/or with each other; andg) welding the one or more steel plates to the side walls of the cargo hold, and/or to each other in fluid-tight relation, to thereby provide a continuous second bottom to the cargo hold capable of supporting and retaining cargo placed in the cargo hold.