| 摘要 |
PURPOSE: A prefabricated handrail for constructing and maintaining a common duct is provided to install a handrail in a site for constructing the common duct without carrying a separate safety fence. CONSTITUTION: A fabricated handrail for constructing and maintaining a common duct includes a first and a second cover (10,20) with a handrail, a first and a second support (30,40) with a handrail, a first and a second handrail (50,60), and fixing units (11,21). The first and the second cover with the handrail are arranged inside an opening unit of an entrance (2) which is formed under the ground to connect the common duct in the earth with the ground, and equipped with an opening handle and a rail handle. The first and the second support with the hand rail have both sides which are detachably installed on the inner wall surface of the common duct. The first and the second handrail are extractably inserted into the first and the second support with the handrail. |
