| 摘要 |
PROBLEM TO BE SOLVED: To prevent inexpensively crosswise sway of a duct suspended from a ceiling and reduce a work burden of a worker at work execution. SOLUTION: Four support materials 2 are suspended from a ceiling 4, a lower end part of each support material 2 is mounted in a duct 1, it is supported in a pendent condition. An extensible/contractible first connection material 6 is obliquely arranged between the two support materials 2 positioned on a diagonal, also an extensible/contractible second connection material 7 is similarly obliquely arranged to be crossed with the first connection material 6 between the rest of two support materials 2. Both the connection materials 6, 7, after arranged in a contracted condition between the support materials 2, is extended, both end parts of the connection materials are engaged with both the support materials 2. |
