Manhole covers most commonly come in sizes from 300mm x 300mm to 1200mm x 1200mm, for square/rectangular covers, and with 450mm or 600mm diameters for circular covers.
How Big Is a Manhole Cover?
A manhole cover is a metal disc–shaped component that covers a manhole—an opening in the ground—to keep people, animals, and debris from falling into the manhole.
The size of the manhole cover varies, depending on the size of the opening and the local regulations. Generally, manhole covers are round in shape and range from 24 to 48 inches in diameter.
The exact size of the cover depends on the local regulations, as well as the size of the manhole itself. In most cases, the size of the manhole cover is determined by the size of the manhole opening.
For example, a manhole opening that is 24 inches in diameter will require a manhole cover that is 24 inches in diameter. Most manhole covers are made of steel and are typically circular in shape.
The size of the manhole cover also depends on the type of material used in its construction. For example, manhole covers made of cast iron are usually heavier and thicker than those made of steel.
The weight of the manhole cover also affects its size. For example, a manhole cover that is made of cast iron may weigh up to 500 pounds, while a manhole cover made of steel may only weigh up to 150 pounds
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