There are rules everywhere to restrict people's behaviors so that people can live a normal life. Manhole covers also have many specifications in various production industries to restrict the production process of products, and the production specifications of different countries are different. And according to the place of use, the specifications formulated are also different.
Manhole covers are closures at the top of the entrances and exits to underground equipment. Manhole covers are required wherever public facilities such as tap water, telecommunications, electricity, gas, heat, firefighting, and sanitation are installed. With the rapid development of China's economy, China's basic equipment construction has ushered in a new cycle. The market demand for manhole covers in urban planning and road construction is huge. However, the manhole cover is crushed and damaged occasionally, which causes the road and equipment safety to decrease. This article starts with various manhole cover specifications and analyzes the rationality of setting the specifications.