Riveted Steel Shelving is designed for heavy-duty storage, accommodating a total weight capacity of 3,800 lbs. with its five sturdy shelves. Constructed from heavy-duty riveted steel, each shelf measures 1/2" thick and is made of treated particleboard that meets California Carb Act standards. The boltless assembly requires only a rubber mallet and takes less than 30 minutes, fitting vertically or horizontally.