SGH evaluated the 120 ft by 166 ft deck that consisted of a 7 in. thick, post-tensioned slab with post-tensioned beams and girders. We found a loss of slab finish and indications of structural damage, including voids between column tops and slab and voids extending over tendons.
SGH examined two options, concrete repair or complete slab removal and replacement, and evaluated cost advantages, quality, and maintenance limitations over time. The contractor elected to replace the slab in order to provide better reliability despite the fact that it was the more expense repair option.
We helped the contractor address detensioning, shoring, crane capacity limitations, demolition sequencing, rigging equipment design, integration with the existing facility, and managing risk and safety.