| 摘要 |
PROBLEM TO BE SOLVED: To provide a floating roof with a single deck structure wherein the collecting and draining performance of rain water are taken into account so that a roof plate may not be depressed or corroded because rain water is accumulated in a recess on the roof plate to cause irregularity thereon after the floating roof of a floating roof tank with a single deck structure is deflected, and of which structure is simplified enough to be constructed easily.SOLUTION: A plurality of trough-like draining channels 12 that collect rain water on the upper surface of a roof plate 6 and lead it to a central sump 11, are radially arranged to the radial direction reaching the central sump 11 from the vicinity of the inside of an outer pontoon 7. |
