Brayman Construction Corp., headquartered in Saxonburg, Pa., installed 176 total shafts for the foundation of the 40-span precast concrete segmental box girder bridge over the Susquehanna River Bridge in Harrisburg, Pa.
The $5.8 million project consisted of 156 shafts for the bridge piers with 72-inch rock sockets that averaged 15 feet in length, and 20 shafts for the bridge abutments with 42-inch rock sockets that averaged 10 feet in length. The rock sockets were installed in sandstones and siltstones with unconfined compressive strengths as high as 25 ksi. The project was particularly challenging, as 100 of the shafts for the piers were located within the limits of the Susquehanna River and its fluctuating water levels.
All shafts were inspected for cleanliness using a shaft inspection device to ensure that no more than one inch of debris or sediment was located on the shaft bottom. Cross-hole sonic logging (CSL) was performed to evaluate the presence of anomalies, defects or voids in the shaft concrete – and none were detected.
Incorporated in 1947 as a family business with a staff of two, Brayman has broadened its construction services from simple single-span box culverts to a become a $100 million nationally recognized provider of complex heavy/civil, demolition, geotechnical, marine, and steel erection construction capabilities. Brayman offer solutions to projects of all sizes and complexities in multiple public and private market sectors throughout the eastern United States.