Typically an open structure, a concrete parking garage is exposed to more extreme temperature variations and other harmful conditions than other structures. Many garages in Northern regions experience deterioration problems caused by corrosion of reinforcement, freezing and thawing, cracking, and water penetration. Delaminations and spalling of slab-top surfaces, water leakage through joints and cracks, rust stains, and concrete spalls on slab bottoms, beams, and other underlying concrete elements are all common symptoms of concrete parking garage deterioration.
Despite harsh exposure conditions, parking garages can be designed to be more durable structures. To help concrete parking structures better withstand the elements, consider:
- Concrete cover over reinforcement
- Concrete mix design
- Construction practices
- Precast, prestressed concrete connections
- Post-tensioning details