The design for new cast iron drain bowl with sediment catcher eliminated debris buildup within the drain bowl. New cast-in-place concrete encasement with steel reinforcement and hydrophilic water stops around the drain bowl topped with heavy duty traffic coating system provided watertight system and eliminated water infiltration into concrete substrate. Drain repairs were completed in 2020 in the first year of a five-year phased plaza renovation and coating replacement project.
Traffic coatings have since been completed in a targeted approach and are expected to continue through 2024. Extensive concrete repairs, including full-depth repairs, were required in drive lane areas due to moisture infiltration and minimal concrete cover around reinforcing steel. Hydro-demolition was selected to ensure 100% removal of the existing traffic coatings.
Plaza deck renovation had been phased over a four (4) year schedule. Phase 1 was completed in 2021 and Phase 2 is currently ongoing. Phases 3 and 4 are scheduled to be performed in 2023 and 2024, respectively. At the plaza level, approximately ten (10’-0”) feet of excavation was required to transition the waterproofing at the foundation walls. Building façade panel removal was performed so that the new plaza waterproofing could be transitioned to the building waterproofing. Following removal of the existing failed waterproofing membrane, a new hot applied waterproofing system was installed, and new concrete paving placed.
These renovations resolved the client’s concerns of tenant/occupant complaints from repeated leaks, falling debris, trip hazards, and re-established protection of the unique garage structure.