| 摘要 |
PROBLEM TO BE SOLVED: To provide a lightweight noncombustible duct with superior air tightness, heat insulation, lightness, noncombustibility, and water resistance. SOLUTION: A plurality of unit plate materials 2 wherein a front face and a back face of a hollow synthetic resin plate 2 formed by connecting a pair of plane parts 51, 51 by a longitudinal wall part 52 at a predetermined interval are covered with metal sheets, is connected so as to be able to be bent via a connection member such as a hinge 3. It is cylindrically assembled at a construction site, and connecting portions or joining parts 11 are fixed and sealed by a noncombustible seal material such as aluminum adhesive tape 4 to form the lightweight noncombustible duct 1. COPYRIGHT: (C)2009,JPO&INPIT
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