We prepared an evaluation report with general recommendations, including temporary shoring, structural member replacement and protective coatings. Due to the high degree of soluble salts and chloride ion content, and with prior substandard repairs causing an accelerated deterioration due to entrapped contaminants, we determined that several sections of metal deck, concrete slab, structural steel beams and column bases would require replacement in lieu of repair.
Steel framing members which resulted with less contamination catalyst content and a higher degree of remaining steel section could be salvaged and reinforced with steel plate and angle welded reinforcement.
Since the original paint and galvanize coating had long been depleted at much of the garage area, recommendations for complete surface preparation, including treatment of chloride ions and soluble salts, with application of a high performance rust inhibitive paint system was given. Additionally, low-level parking regrading was necessary due to the steel column bases being embedded below grade, and elevated concrete pier supports were submitted as an option. As the client’s budget was constrained, we provided a phased repair approach including requirements for limited parking use and temporary shoring.
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