| 摘要 |
Each section comprises four side walls 1 to 4 defining four corners 15 to 18 extending between top and bottom faces, and a reinforcing post 20 incorporated into each corner during casting of the section. The post may include a vertical element which is encased in concrete with top and bottom plates which define the top and bottom corner faces of the section. The top plate has a screw threaded socket for receiving a lifting loop 40 or a locating pin 36, 37, and the bottom plate has a hole for receiving the pins of another such section. One of the locating pins 37 may be significantly higher than the others to assist location during assembly of the lift shaft. Later embodiments relate to a lift shaft constructed from said concrete sections, a method of forming said concrete sections and a method of constructing a lift shaft using said sections. |
