Two Buckhead Plaza Office Building

Location:

Atlanta, GA
 

Owner:

Stafford Properties Inc., Atlanta, GA
 

Architect:

Corcoran, Nelson, Nardone Associates Inc., Atlanta, GA
 

Engineer:

Echelon Engineering LLC, Atlanta, GA
 

Contractor:

Trammell Crow Residential, Atlanta, GA
 

Project Scope

Sq. Footage:

210,000 (office with restaurant and retail)
 

Levels/Floors:

7
 

Structural Precast Elements:

1,349 total pieces including wall panels, columns, tri-slabs, flat-slabs and rectangular beams.
 

Award:

2006 PCI Harry H. Edwards Design Award
 
 
 
 
 
 
 
Two Buckhead Plaza Office Building
Two Buckhead Plaza Office Building
Two Buckhead Plaza Office Building
Two Buckhead Plaza Office Building
Two Buckhead Plaza Office Building
Two Buckhead Plaza Office Building
Two Buckhead Plaza Office Building
Two Buckhead Plaza Office Building
Two Buckhead Plaza Office Building
Two Buckhead Plaza Office Building
Two Buckhead Plaza Office Building
Two Buckhead Plaza Office Building
Two Buckhead Plaza Office Building
Two Buckhead Plaza Office Building
Two Buckhead Plaza Office Building
Two Buckhead Plaza Office Building
Two Buckhead Plaza Office Building
Two Buckhead Plaza Office Building
 
 
 
 
 
 
 
 
 
 
 
 
 

Designers created an all-precast concrete structural system that emulated cast-in-place construction to meet the owner’s needs, which included the restriction of having 21-inch total depths for floor joists and 28-inch total depths for beam lines. To achieve this, the precaster created two new product lines.

The first product consisted of “tri-slab” deck members that were 12 feet wide by 18 inches deep. The members feature three stems, a half-stem on each end and a full stem in the middle. This allowed the two half-stems to create a full stem when they were placed side by side, creating a joist that was 6 feet on center. The sides of the tri-slabs have a shear key running the full length of the half stems, so they can be grouted together to eliminate welded connections.

The second product line was a W-shaped beam that was 36 inches wide by 25 inches deep. The W-shaped cross-section comprises a center web and two thinner outside webs that each have pocket blockouts into which the tri-slab stems fit. After the tri-slabs were set, two trough sections were formed on either side of the center web of the W-beam. These troughs were poured in the field to lock them together. The W-beams threaded over rebar couplers on the columns, and the connections were grouted together. Each floor then received 3 inches of field topping to complete the system.

The architectural precast concrete cladding panels serve as intermediate moment frames for lateral-load resistance in the long direction of the building. The result of these design innovations was to give the owner the continuity available with cast-in-place concrete while providing the speed, quality, convenience and cost of a precast concrete design.

DESIGN CHALLENGE: Create a seven-story, 210,000-square-foot Class A office building with restaurant and retail space on the ground floor. The building must feature continuous-span construction for beams and floor joists, as well as no welded connections, to avoid increased maintenance costs.
 
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