These videos provide information on structural steel detailing, which is a specialized type of drafting. Detailers convert engineering drawings to fabrication shop drawings so that the structural steel can be properly cut, cambered, welded, bolted, etc. Most detailing is performed using expensive and specialized detailing software -- and many detailers are now using programs that show 3D renderings, which are useful in eliminating interference between the steel and other systems such as ductwork. In addition, the detailers provide important information on connections.