PURPOSE:To make stowage work ever so easy, by using a king beam installing each stacking cone and thereby having a consolidated state of a container formed in all directions of the king beam. CONSTITUTION:A king beam 1 is of a long member making its section from in an orthogonal direction to a lengthwide direction into a cross, and its horizontal part, it takes an interval made in conformity with width of each container 10. And, each stacking cone 10 is symmetrically installed tight in all directions of this horizontal part. At the time of stowage, the king beam 1 is installed between angular side parts 10a of each container 10, and each stacking cone 11 is fitted in corner hardware 12 of each container 10. Under this condition, each upper container 10 is properly stowed on each lower container 10.
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