An overview of current practice in the field of cable-stayed post-tensioned precast box girder technology and construction is presented. Likewise, a preliminary design for a 600 foot main span cable-stayed post-tensioned box girder bridge is presented. The analysis considers dead load, and live loadings acting on the girder using nonlinear analysis assumptions governing the bridges response. Since specific codes governing cable-stayed bridges are not presented in the AASHTO Code, analysis was based on allowable stresses where requirements in the AASHTO code were not specified. / M.S.