| 摘要 |
PURPOSE: A square manhole cover with a lifting ring function is provided to easily lift the installation height of a manhole cover, and to be securely coupled to an asphalt concrete material. CONSTITUTION: A square manhole cover with a lifting ring function comprises a body(110), a cover support projection(120), pressure units(130), and a fitting member(140). The body is mounted on the top of a base fastening member(20), and formed to be corresponded with the lifting height of a road. The cover support projection is protruded to the inner side of the body, and support the manhole cover. The pressure units are protruded to the outside of the body, and fixed by downward pressurizing by concrete mortar or asphalt concrete. The fitting member fixes the body to the bottom of the base fastening member. |
