... and price Explosion-proof single-girder crane1.Manufacturing, installation, use all accord with JB/T 10219 "explosion-proof overhead crane" ... than II B or II grade C5.Ignites temperature classes are T1 ~ T4 group a flammable ... with converter function, steady travelling3.Choosing according to different needsCrane Mechanical Feature1.Single welding box girder,Material Q235B or Q345B ,Rectangular tube ...