SPS Repair
Strengthening of SUNY parking garage
Strengthening of SUNY parking garage
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Award-Winning Strengthening of Parking Garage
Brooklyn, New York
Award Winning Project:  Award of Excellence - Strengthening Category, International Concrete Repair Institute (ICRI) Project Awards

Located in Brooklyn, the State University of New York (SUNY) Health and Science Center parking structure serves as the main parking facility for the adjacent medical complex. Constructed in 1967, the 360,000-square-foot structure has 10 levels - three below grade and seven above - and has space for approximately 933 vehicles. Built using a cast-in-place reinforced concrete moment frame, the floor was designed showing a one-way joist/slab supported by beams having the same depth. However, during construction, a dome pan was used that created a waffle floor slab appearance. Immediately following the completion of construction, a structural crack developed perpendicular to the one-way joists. The crack occurred on all supported levels of the structure. An investigation revealed that a major structural error had occurred, and a substantial amount of the negative bending reinforcing steel was not developed sufficiently past the column supports.

Upon realization of the error, the garage was shored full height, and a corrective solution was implemented. However, over time, the parking structure condition deteriorated due to corrosion damage from deicing salts. Much of the waterproofing system and expansion joints began to fail, and many beams and columns were spalled from corrosion damage. Further, the structural concrete topping debonded in large areas. It was not in the University's best interest to continue repairing the concrete overlay, and the original defect still needed to be addressed to maintain the safety of the structure.

In response to these challenges, Structural Preservation Systems (SPS) was hired to strengthen the structure using Carbon Fiber Reinforced Polymers (CFRP). The use of CFRP on this project is perhaps one of the largest top-side FRP strengthening applications in the US. Not only did it prove to be a cost-effective repair method eliminating a serious trip hazard liability, it also increased the headroom in a low clearance structure and eliminated the risk of future repair costs on a chloride-filled concrete overlay.

Since the structure stayed open during repairs, SPS managed the project in 11 phases, allowing for the removal of only 100 spaces at any one time.



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