Once the overhead crane girder camber is deformed, the repairing is required unless you have adequate budget, you can replace the old piece of lifting equipment with a set of new overhead crane. There are two ways to restore the deformed crane girder, the traditional Flame Correction Method and Prestress Correction Method.Flame Correction MethodThe principle of flame correction method is to heat the three sides of the girder and cool it down to reform the girder camber. It is difficult to control the heating temperature and time, thus, it is also very difficult to guarantee the reformation of the girder camber.Prestress Correction MethodPrestress correction method is to install two prestressed tensioners on the both sides of the flange-slabs of the overhead crane girder and use the tensioners to produce tensioning forces evenly and simultaneously to restore the crane girder camber. The advantages of this approach are:
When overhead crane camber deformation happened, professional crane restoration engineer is needed and advices, technique support and services from the overhead crane manufacturer are important. Free consultation are provided from Dongqi Crane whenever needed.