Contrx capabilities include fabrication of single box girder or Monobox cranes and double box girder cranes. Box girder cranes have almost unlimited capability as they have a very light weight to span ratio which can reduce the size of the required runway and building structure. Box girder cranes are used in applications where a very robust, long lasting crane is needed. Contrx box girder cranes are fabricated by AWS D1.1 and D14.1 certified welders and designed specifically for your application.