| 摘要 |
<p>A reinforcement bar centering device (2) to locate and centre a reinforcing thread bar (3) in a hole formed in an excavation to receive a foundation of a building. The device has a body having a band (8) of appreciable thickness formed on its periphery. There is a central opening (10). A thread is formed in the central opening (10) to engage the thread (11) of the reinforcing thread bar (3). Sloping portions extend from the peripheral band, inwardly to the central opening. Openings (12,16) allow concrete to pass by the device while the device is positioned in the hole.</p> |
