| 摘要 |
A steel grating and a drain cap for installing a manhole are provided to prevent bad smell and to prevent infiltration of foreign material to a plurality of drain holes by individually inserting drain caps to a plurality of drain holes. A steel grating and a drain cap for installing a manhole comprises a rectangular drain hole, the drain cap, a drain cap body, a shielding cover(5). The body has an upper part(4a) and a lower part(4b). The rectangular drain holes are formed on an upper surface of the steel grating and a facility for installing a manhole. The drain cap is individually inserted to the rectangular drain holes. The drain cap is ejection-molded with a recycling material such as a synthetic resin. The drain cap body is tapered towards to the lower part. The upper and the lower parts of the drain cap body are opened. The shielding cover is formed in the upper part of the body. The shielding cover is opened and closed by self weight caused by water pressure. |
