| 摘要 |
PURPOSE:To prevent deformation of a ceiling, by deferentiating the strength of outside suspension rods from that of inside suspension rods, and designing the outside suspension rods to be breakable upon generation of vacuum due to sloshing of a cold liquid to deform a suspension deck. CONSTITUTION:The strength of suspension rods 4a located in a vacuum generation range 7 is differentiated from that of the other inside suspension rods 4b. The suspension rods 4a are breakable when a vacuum tensile force greater than a certain value is applied to a suspension deck 5 because of sloshing of a cold liquid 6. Accordingly, a ceiling 3 is protected with no deformation. Further, even if shear of the suspension rods 4a is generated, the suspension deck 5 may be safely supported by the inside suspension rods 4b having a large strength. |
