The production and use of manhole grates and covers must comply with relevant industry standards. For example, the size and spacing of the drainage holes in manhole grates must conform to drainage design specifications to ensure drainage efficiency; the load-bearing capacity of manhole covers must pass professional testing (such as C250 or D400 grades) to meet the needs of different scenarios.
Maintenance of manhole grates mainly focuses on clearing blockages and regularly checking the filter screen for damage to ensure smooth drainage. Maintenance of manhole covers emphasizes safety; it requires regular checks for loose covers and damaged bases, and timely replacement of aged or damaged covers to prevent accidents.
