How much would it cost me to make a 10 x 10 slab of concrete if I am doing it myself? Also do i need to put gravel down? It's not for a customer its for myself to put my power rack and bench outside since I cant workout inside my house because I don't have the space. The power rack alone weighs 800 lbs. Plus weights so its about 1200 pounds sitting on concrete. I know its an out of the blue question but I figured someone would know. Thanks :weightlifter: