McCarthy Building Companies Inc. is nearing completion on the 72,000-square-foot expansion of the Women's Center emergency room at Rancho Springs Medical Center at 25500 Medical Center Drive in Murrieta.
McCarthy was retained for the $32.3 million project by Universal Health Services Inc. (UHS), a hospital construction management firm. Tim Rielly is the project manager for UHS.
The project entailed construction of a two-story, cast-in-place concrete building with stud framing, plaster exteriors and punched windows.
McCarthy is also performing site work at the 5.5-acre property, including construction of a 252-space parking lot with associated site improvements.
According to McCarthy project manager John Metoyer, work on the health facility initially was scheduled for completion on Dec. 10 but, despite added work scope, the project was accelerated to an early November completion date.
"The project is especially unique in that it integrates 9,000-PSI high strength concrete mix for the structural columns into the 5,000-PSI structural deck concrete with no cold joints, which added a high degree of difficulty to the concrete work," Metoyer said.
Placing the 9,000-PSI concrete was challenging because it cured much faster than the 5,000-PSI mix used for the decks. The columns were poured monolithic with the deck, which required careful coordination and timing for the delivery of the 9000-PSI mix design so that the two mixes could be blended where the concrete deck and columns join.
McCarthy Building Companies constructed mock-ups of the column-to-deck connections to determine the best sequence and method of placement.
Other challenges for the McCarthy team included avoiding disruption of an operational emergency department during the construction of new corridors that connect the new construction to the existing facility.
HKS Architects of Dallas is the project architect and structural engineer.
Hunter Associates Texas LTD, a TRC Company based in Dallas, is the civil engineer; and CCRD Partners of Dallas is the electrical and mechanical engineer. San Diego-based KTU+A Landscape Architecture & Planning is the landscape architect.