| 摘要 |
PROBLEM TO BE SOLVED: To provide a clean room excellent in constructibility and allowing easy construction of hermetic structural parts while being so excellent in airtightness and waterproofness that it is particularly suited for use as an independent factory to be newly installed or extended. SOLUTION: This clean room comprises a two-layered metallic roof and metallic walls. Sealants are provided at the wrapping section mating surfaces of metallic roof boards constituting the inner shell roof A of the metallic roof and the inner shell wall B of the metallic wall and at the draining mating surfaces of the metallic roof boards and a metallic wall plate B1 to impart airtightness.
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