slewing bearing beam transport vehicle

Technical Guide Slewing Bearings in Beam Transport Vehicles How a 700 mm slewing ring keeps 1,000-tonne girders moving Application case from Anhui Yuanfeng What is a beam transport vehicle? A beam transport vehicle (also called a girder transporter) is a special-purpose machine used in bridge construction to carry precast concrete box girders from the casting yard to the erection site. A single girder can weigh 800 to 1,200 tonnes, and the vehicle that carries it may have 40 or more wheels arranged on multiple independently-steered axles. Every steering axle group pivots on a slewing bearing. The bearing must transmit the full axle load to the chassis while allowing precise steering rotation - often under extreme load, shock, and dirty construction-site conditions. This makes beam tr...