What Is the Weight of a Manhole Cover? – According to Government Security News, a manhole cover weighs between 90 and 150 pounds. A 32-inch cast-iron manhole cover can weigh up to 250 pounds at 450 pounds per cubic foot.
Manhole covers were initially constructed from cast-iron to resist the weight of transport vehicles such as buses and heavy trucks. Oil corporations began seeking for alternatives to use on their gas station storage tanks in the 1980s since these hefty coverings can cause major bodily injury to personnel. Composite manhole covers, such as those made by Fibrelite, have been proved to be a lighter and safer alternative to cast iron while still holding the same weight.
Read more: What Is a Conditional Prognosis?