Structural warehouse stores hundreds of different sizes of angle, pipe, I-beam, tubing, flat bar, round bar, square bar, channel, expanded metal and more structural items quickly and efficiently. It is made from high-strength hot-rolled structural steel produced at state-of-the-art min mills. Stronger rack that is able to withstand abuse to a much greater extent and has fewer maintenance needs, secure construction is assured by an ingenious lever-action bolt connection. Laboratory tests confirm an ultimate load of 50,000 pounds (22700 kg) per level with this single bolt.