5 Tier Garage Shelving Unit 180x120x60cm 175kg Load Weight Per Tiershelving is strong and sturdy. The shelves are made of 5mm MDF. While the shelves are rated at 175kg 385lb each, we would say that 80 100kg per shelf is a more sensible rating limit. The theory behind keeping the shelves to 5mm thick is to keep the overall package weight around 20 25 kg thus allowing courier delivery and crucially allowing easier movement should you decide to move it around once assembled. Reviews elsewhere mention how MDF shelves can