When A. S. Horner Construction Company, Denver, was awarded a contract recently for the construction of four highway bridges and two railroad bridges within the area of the Air Force Academy north of Colorado Springs, Colorado, it was confronted with a problem in positioning the prestressed concrete girders for the highway bridges following their onsite casting. The following method was developed: two gantries were constructed, each with a 50- ton chain block. Mounted on rails which extended over the abutment on temporary steel trusses, these gantries, in effect, "straddled" each end of the girder in its casting bed. Subsequently, the gantry chain blocks were hooked onto the lifting loops in each end of the girder, which was then rolled into its final position in the span. Concrete casting beds were constructed on one of the approaches to each bridge. These casting beds were aligned with the final location of the girders on the piers and abutments. Wooden side forms, fabricated in 20 foot long panels, were used to form the girders. These panels were bolted to inserts in the concrete form soffit a the base and tied across the top? Each panel was used an average of 15 times before major repair was needed. Both internal and external vibration were used for consolidation.