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by belinda munday
(harlow)
Q. How much does a patio slab weigh that's 16 x 16 x 1?
A. At 4" thick, concrete weighs approximately 50 lbs per square ft. A typical 4" patio with 256 sq ft weighs about 12,800 lbs. If your patio is 1' thick, then 12,800 x 3 = 38,400 lbs.