Its weight also helps keep the shed secured to the ground. it is commonly used for houses, factories and large warehouses. it is good to work on and provides a strong base to attach the shed walls and anything else you want to. if you are thinking of using a concrete foundation then you will have to plan it ahead of time.. Learn how to build a level shed floor foundation that's sturdy and protected from moisture. get detailed shed foundation plans here: http://low.es/1ujz7rs di.... If you have the opportunity to purchase one of my shed plans, you will quickly find out that my favorite of all shed foundations is the wooden floor built on 4x4 skids which are anchored to the ground with 4x4 posts/piers sunk in concrete.out of the 10 or so county's around where i live, and purchased a building permit, this was the required method of anchoring a shed floor..