Single welding box girder, beam deflection with DIN/FEM standard Steel Material: Fe37 or Fe52 (Equal to Chinese standard Q235B and Q345B) Whole length CNC cutting for complete web plate, to ensure the precision and smooth curve shape of the camber Trolley rail is made of high strength hot rolled flat steel (16 Mn) Automatic submerged arc welded main weld with NDT inspection Shot-blasting Sa2.5 for complete girder after welding, to achieve stress release Epoxy zinc-rich painting for one bottoms and two sides of 120μm thick, to achieve a long lifespan, beautiful appearance and good luster The girder and end beam are connected together by Class 10.9 high strength bolts to ensure the structure strength and precision of the whole machine Trolley and crane are driven by Three-in-One driving mechanism, variable frequency speed regulation, the hard tooth face, electromagnetic disc brake Protection class: IP54, Insulation class: F, electrical sustained rate: 40% ED The end beams are equipped with flat wheel or double rim wheels, anti-friction bearings, buffer blocks and derailment preventing end plate Maintenance walkway is located on one side of the main girder, consisting of pattern plate, armrest (Height: 1050 mm), pillar and toe protection