Concrete Provides Luxury Residence in Atlanta
Completed in the fall of 2007, the Parc at Buckhead offers apartments for lease in a high rise independent living community for 55 and older active seniors. The 296,000-square-foot concrete frame tower, topping out at 224 feet above street level, is located in the heart of the upscale Buckhead district in Atlanta, Georgia. The building has 193 apartments with landscaped gardens and the amenities and services of a five-star hotel.
This 20-story tower, transfers out over two stories of underground parking using 15 post tensioned transfer beams which are between 3- and 6 1/2-feet deep.
Typical tower floors are 8-inch post tensioned flat plate supported on 24-by-30-inch columns. Lateral system consists of 14-inch concrete shear walls which reduce to 12 inches at the upper lobby and surround the elevators and stairs at the core of the building. Due to a mix of rock and soil on site, the tower structure is supported on deep piles and shallow foundations.
There is also an elevated lap pool, sunroom, and terrace next to the tower that provide stunning views of Buckhead for the residences.
To aid the construction schedule, a 5,000 psi early concrete mix was used for the tower slabs to allow for stressing after 24 hours. In place IntelliRock concrete maturity testing was used to avoid the requirement of an on-site testing facility. This allowed tower construction to move skyward at one floor, almost 15,000-square-feet plus vertical structure, every seven days.
The concrete supplier constantly updated their mixes to work through a transition from winter to summer and also to allow the mix to be continuously pumped up the tower over 200 feet.
Concrete framing allowed the structure to have superior acoustic performance to steel framing, and also provided built in fireproofing. The thin floor plate design, only possible with concrete, allowed for an increase in tower floors and rentable residences without adding to the overall height and cladding cost of the tower.
The flexibility of concrete construction, as opposed to fabricated steel, allowed the design team to make last-second additions and revisions to the tower and to maintain expectations for this all inclusive luxurious community.
Due to the efforts of the design team and use of an efficient concrete frame, the project stayed on schedule and within budget.
Corcoran Ota, Atlanta, Georgia
Pruitt Eberly Stone, Atlanta, Georgia
Choate Construction, Raleigh, North Carolina