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Allright Parking Garage 

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Location: Columbus, OH

Structure: Allright Parking Garage 

Problem

Allright Parking Co. operates under a long term lease, a ten level 180,000 square feet reinforced concrete parking garage, located at 60 West Long Street in Columbus, Ohio. The first two levels (basement and street) are in good condition, primarily due to the fact that they are on terrain. The eight elevated levels (first mezzanine to fifth floor) have suffered damage due to the infusion of water and salt into the concrete, and what appears to have been poor quality original construction. All of the elevated levels have suffered rebar corrosion, delamination, spalling and the loss of sections of concrete from the floor and roof. Previous restoration work has involved patching with asphalt, cement mortar, polymer concrete and polymer coatings.

All of the elevated levels had cracks and holes in the decks. The top two levels being in the worst condition. These levels had extensive surface disruption due to prior attempts to remove an asphalt top coat and due to general deterioration. Some areas of the decks and ceilings have exposed rebar.

The conventional approach to restoring a garage in this condition is to remove the concrete deck down to and just below the first course of rebar and to remove the concrete all the way through in areas where ceiling spalling had occurred. Some new rebar is then added and a new concrete top deck poured. Other than the basement and ground levels all of the elevated levels could be considered for this type of repair work. This would cover 144,000 square feet and cost between $2.0 to $2.5 million. The garage would be out of service or available for limited use during the repair period which could last for four to five months,


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