Abstract: Steel box girders have the advantages of fast installation, light selfweight, large span, high load carrying capability and ease maintenance. They are receiving wider applications in the highway bridge construction practice. This paper presents a case history of the installation of steel box girders of a highway ramp over the existing Xi'anTongchuan high speed road. Steel box girder construction details, such as, installation procedure optimization, construction control measures and structural component performance during the construction, are considered and analyzed.

Key words:  , Box Girder Installation, Construction Control Measures, Structural Components Performance