The use of the birthing chair or similar devices has been seen around the globe, not isolated to a particular region. The birthing chair can be traced to Egypt in the year 1450 B.C.E. Pictured on the walls of The Birth House at Luxor, Egypt, is an Egyptian queen giving birth on a stool. It can also be traced to Greece in 200 B.C as it is featured on an ancient Grecian sculpted votive.
Water weighs 64 pounds per cubic foot and there are 27 cubic feet in one cubic yard. So a cubic yard of seawater weighs 1728 pounds. The original VW Beetle weighed only 1650 pounds! If that seems hard to believe, consider that 1 cubic foot is almost 7.5 gallons, and a cubic yard is more than 201 gallons.
Best Answer: Standard concrete weighs almost 4,000 pounds per cubic yard. A cubic foot of concrete weighs about 145 pounds. That means you would need roughly 3 bags per cubic foot. There are 27 cubic feet per cubic yard. If you need 6.5 cubic yards, that is 526.5 bags of mix, (3*27*6.5=526.5). Adding water to the mix will increase the weight a little bit, but you'll waste some of that volume in the wheelbarrow and on the ground.