Muscle Rack UR185P-BLK Black Steel Heavy Duty 5-Shelf Shelving Unit, 4000lbs Capacity, 36" Width x 72" Height x 18" Depth

are the bottoms of the legs rubber padded or just exposed metal? If in a garage and one hoses out the garage, rubber better, no?

What are the exact measuremets for the wooden pannels used for the shelves?

Can this unit be anchored to a wall 6" off the floor? I want to put this in my garage and the foundation comes in several inches from the wall.

Can someone tell me dims of the spport vertical L bars?