I purchased two sets of this cabinet unit designed to give me 18' of cabinets (six cabinets all together). Each cabinet when constructed weighs about 140lbs. Each cabinet hangs on a wall mounted suspension rail that was bolted to my garage wall. I used four wall anchors per suspension rail - each rated at 275lbs - giving me a potential supporting weight of over 1000lbs per cabinet. It took me three nights to build and mount all six units. I was quite impressed with the quality of the materials used - the side panels and the shelving is of heavy duty material. I do not see these bowing too much even under heavy weights. One of the best purchases I have made from Wayfair.