Safety is the most important factor to be considered during a construction. The Tower crane seems quite unsafe to the naked eye because they have no support wires of any kind. But the Tower Cranes stability depends on certain elements. The first element is a large concrete pad that the construction company pours several weeks before the crane arrives. The concrete pad typically measures 30 feet by 30 feet by 4 feet and weighs 400,000 pounds or 182,000 kilogram. The Tower Cranes are essentially bolted to the ground to ensure their stability. Large anchor bolts are embedded deep into the pad support in the base of the Crane. But before that, Tower Cranes are delivered at the construction site on 10-20 tractor trailer rigs.

 

Mobile Crane is used to assemble the jib and the machinery section. The Mobile Crane then adds the counterweights. To rise to its maximum height, the Tower Crane grows itself one mast at a time. Special devices within the Tower Crane prevent the user from attempting to lift a weight heavier than allowed. Because the United States Government sets specific regulation through safety that limit the weight that a specific Crane is allowed to lift. A completed Crane is first tested without a weight to ensure that all of its components operate properly. It is then tested with a weight to ensure that the crane is able to lift heavy objects without loosing stability. Safety is ultimately depends on that proper use of the Crane.