THE PINNACLE AT CITY PARK SOUTH PHASE II
Location
Colorado, USA
PROJECT TYPE
Vertical / High-Rise
PROJECT TIMELINE
24 months
PROJECT SIZE
22 Story
CONCRETE
20,000cy
ARCHITECT
Fentress
STRUCTURAL ENGINEER
OPUS Design Group
GENERAL CONTRACTOR
OPUS Northwest
CONCRETE
Concrete Frame and Associates (vertical)
CONCRETE
Concrete Frame and Associates (vertical)
The Pinnacle at City Park South is located directly across the street from Denver's City Park, a 370-acre park system modeled after New York City's Central Park. This two-tower, luxury residential development features condominiums and park homes.
Opus' team designed The Pinnacle in two phases - The 27-story Phase I features 140 luxury one-, two- and three-bedroom residences plus 18 two-story park home residences wrapping the 17th Avenue and Fillmore Street sides. The architectural design is modeled after Phase I; the 22-story Phase II tower features 98 luxury homes with two and three bedrooms.
Both towers are capped with two elegant penthouses. Taking inspiration from the mix of historic architecture and materials of the surrounding neighborhood, the Opus team incorporated stylish concrete into the exterior features and building design of The Pinnacle.
Project Challenges
BURNCO helped provide a solution for getting the project back on schedule for the Phase II portion of this project. Many concrete mix designs were utilized on this project, from high strength 8,000 psi shear walls and columns to 5500 psi post-tensioned slabs. When BURNCO started the project, the schedule for the slabs was to begin in early November. The aggressive plan required placing a floor every ten days through the winter, topping out in June.
Project Solutions
The shear walls and columns in the three bottom levels of the parking structure were placed with 8,000 psi concrete to increase parking square footage. The mix was designed with smaller aggregate and high cement content to flow freely through the detailed rebar structure and provide a nice glassy exposed finish.
Working with OPUS, we built a Post-Tensioned slab mix that allowed them to get 80% of the design strength in 2 days to stress the slab and continue to move up. OPUS figured out a way to warm the subgrade by tenting and heating the floor immediately under the slab we placed. This process allowed the mix design to gain heat and strength throughout icy ambient conditions. OPUS understood the importance of quality testing by using maturity meters on the slab placements and providing a well-protected testing lab for cylinder storage and testing. With great teamwork, BURNCO completed this project before the contracted end date.
Project Awards
NAIOP Colorado Development of the Year (2007)
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