... 9001 1. Brief introductionMH type single girder gantry crane is devided into 3 types, box girder type, truss type and truss leg ... type. Compared with box girder type, The windward area of the truss type is very ... Crane traveling limit switch, Voltage lower protection function, Emergency stop system, current overload protection system and so on! 16t single girder gantry crane