| 摘要 |
<p>PURPOSE:To execute at each completion of a building frame of each story of a building, to avoid fray at the time of carrying in trunk ducts to the site, to average number of operators, and to facilitate maintenance and replacement of components. CONSTITUTION:The trunk device for a building comprises a connecting cable 1 passed through a lower stair floor 3, and a trunk 2 having a conductor provided with connectors at both upper and lower ends, a branch unit 11 at an intermediate part, arranged longitudinally between the floor 3 and an upper stair floor 6 and connected with an upper end of the cable 1 to the connector, wherein a lower end of the cable 1 is connected to an upper side connector of the trunk 2 already arranged at a lower position of the floor 3.</p> |
