With adequate and strict technical preparation, the working procedure is executed in stages of assembly, pre-joint and on-site welding for the super-large crane beam of main workshop of 3,500 mm plate rolling mill.

A steel box-section crane girder with 4m high and 1.

The strengthening method of steely crane girder;

Hoisting of precast concrete crane girder for the powerhouse of Dalahekou hydropower station in Gansu;

The application of long pretensioning method in fabrication of prestressed heavy duty crane girder;

The welding quality of T-type weld in up flange of crane beam and quality controlling;

Performance test of a crane beam in a workshop;

Probe on the mechanism of the fatigue fracture of the upper part of welded steel crane girders;

Reliability evaluation and strengthening for the steel crane girder;

Fuzzy analysis on the crack damage in the steel crane girder system;

Design and calculation of steel crane beam for multifunction crane

Construction drawings of steel crane beam with middle and light class duty type are compiled in National Building Standard Design Collective Drawings SG520-1,2,which is convenient for the design procedure;however,deficiencies of tedious work and high repetitions during drawing still exist.