Motorists Insurance Company Parking Structure
O&S Associates provided the engineering and parking consulting services for the complete structural restoration and preventive waterproofing of this 600 vehicle parking garage serving a 21-story office building for the Motorists Mutual Insurance Company. The building is located on Broad Street just east of downtown Columbus. The structural system of the parking garage consists of cast-in-place one-way concrete joists supported on cast-in-place concrete beams and columns. The floor slab is reinforced with high strength, post tensioning and mild steel reinforcement. The parking facility had been experiencing on-going corrosion related deterioration and spalling of the floor slabs and the helical entry/exit ramp. Previous attempts at patch repairs had been piecemeal and largely unsuccessful in addressing the overall deterioration of the parking garage.
- O&S Associates was retained to perform a condition assessment and devise a program of requirements for restoration of the parking garage.
- O&S developed a repair program which addressed the concrete deterioration of the floor slabs, beams and columns especially at the post tensioning dead ends and stressing pockets.
- A complete waterproofing program was also devised utilizing the most effective mix of protected and traffic bearing waterproofing membranes and sealants. windows, cleaning and coating the entire building; roof replacement and installation of temporary sidewalk protection/bridge.