Straddle Carrier is a kind of Gantry Crane ,but running system is different with gantry crane, straddle crarrier is equipped with rubber tyre for running, it is normally divided into truss type and box girder type,being widely used in workshop, concrete girder yard, shipyard and port, the designer can design various different types Straddle Carrier based on the lifting weight, span and use height. According to the lifting weight, the main beam of Straddle Carrier is divided into single beam and double beam. The lifting system will be winch trolley and electric block system .The operating system can be designed as operation room and remote control according to customer needs. The safety level can vary according to the place of use and customer requirements..