Derek overhead yang digantung di bawah dengan landasan pacu lengkap terutama digunakan untuk pengangkutan material di bengkel manufaktur dan pemrosesan mesin dalam ruangan, bengkel perakitan, gudang, tempat penyimpanan material, untuk mengangkat peralatan pemeliharaan tetap seperti pembangkit listrik, dan kesempatan lainnya. Mereka juga dapat digunakan di bengkel metalurgi dan pengecoran sebagai alat pengangkat tambahan. Selain itu, tidak cocok untuk lingkungan gas yang mudah terbakar, meledak, mudah terbakar, debu, dan gas korosif. Namun, ini tidak cocok untuk lingkungan radiasi nuklir dan lingkungan gas beracun.

Underhung cranes are lifting equipment that are placed horizontally over workshops, warehouses and stockyards for lifting materials. Because the two ends of the bridge's underhung cranes are located on tall cement columns or metal supports, and are shaped like a bridge, they are commonly known as "overhung cranes" and "driving cranes." It is a kind of lifting machinery with wide range of use and large quantity.

After understanding the basic parameters of underhung cranes, we must also understand the metal structure frame structure of the bridge crane in detail. Let’s share it with you. The metal structure of underhung cranes is the skeleton of the crane, on which all mechanical and electrical equipment are distributed. It is the load-bearing structure of the crane and makes the crane form a whole mechanical equipment.