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The primary purpose of lifting a manhole cover is to provide access to underground utilities
. Utility workers and maintenance personnel perform this task to conduct inspections, repairs, or upgrades to the systems below. Regular maintenance is essential; for instance, in the case of sewer lines, routine checks can prevent blockages that lead to system failures and unsanitary conditions.2. Load Capacity When selecting steel grating, it is crucial to evaluate its load capacity. This is typically specified in pounds per square foot (psf) or kilograms per square meter (kg/m²). The load rating depends on the spacing of the bars and the thickness of the material. Common load classifications include light-duty, standard-duty, and heavy-duty, each designed for different weight-bearing requirements.
steel grating specifications

Most manhole covers are round. The shape of manholes has generated a surprising amount of speculation, and the query, why are manhole covers round? has not only become a bit of a cliché but is also a much-searched question on the internet. This question gained worldwide notoriety in the 1990s when Microsoft began to ask it during job interviews.