Sabre Headquarters Southlake, TX
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Located in Southlake, Texas, which is northeast of Fort Worth, is the new
home of Sabre, a leader in providing technology and online services for
the travel industry. The project consists of 2 similar concrete-framed office
buildings—one 4 stories, the other 5—and a 5-story cast-in-place concrete
parking structure for 1,800 vehicles. Together, this first phase has approximately
1.1 million square feet of office and parking space.
In the initial planning stages, Sabre decided that they wanted something
different in their new facilities that would set them apart. In particular, they
sought an environmentally friendly, comfortable workplace that offered
numerous amenities for their employees. It was also important to have clear,
open floor plans that would give them the freedom to set up and subsequently
rearrange their work areas as required. Finally, they wanted their
new headquarters to be a marketing tool that would attract the best and
brightest workers. All of these requirements were met with a concrete
framing system.
Typical bays in the office buildings are 30 ft by 55 ft. Spanning in the 30-ft
direction are wide-module joists comprising 4-3/4-in.-thick slabs on 66-in.-
wide by 20-in.-deep pans, with 10-in.-wide ribs, spaced 6 ft-4 in. on center.
The joists are supported on 48-in. by 24-3/4-in. post-tensioned girders, which
span 55 ft. This long-span floor system provided the column-free spaces required
by the owner. The columns are 24 in. by 30 in. for the entire height
of the building. Lateral loads are resisted by the moment frames.
In the quest to provide environmentally sustainable construction, the owner
and design team utilized the U.S. Green Building Council’s LEED (Leadership
in Energy and Environmental Design) program. This project, which is
probably the greenest corporate office facility in Texas, is one of the first
and largest in the U.S. set to receive the LEED Silver Level Certification. In
keeping with the LEED requirement on the use of recyclable materials, the
concrete mix contained fly ash. A 5,000-psi mix is utilized for both the floor
members and the columns. This was one of many requirements that were
implemented to significantly reduce or eliminate the negative impact this
project would have on the environment and its occupants.
In addition to the green construction aspects, concrete framing was chosen
for other reasons. Overall cost was one of the main factors: it was determined
that structural steel framing would have resulted in a floor system
that was 5 in. deeper than the concrete system. This, along with fireproofing
that was required for the steel, would have increased overall costs significantly.
Also, since this was a high-profile client, the structure needed to be
high quality with superior performance. Exposed interior concrete is used
throughout the facility. Furthermore, vibration of the long-span floor system
is not an issue with concrete framing. Finally, Sabre needed move in as
soon as possible. Even though the LEED program was utilized, the facility
was occupied as planned.
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Owner:
Sabre, Southlake, TX
Architect:
HKS, Dallas, TX
Structural Engineers:
Buildings:
Brockette Davis Drake,
Inc., Dallas, TX
Parking Structure:
HKS, Dallas, TX
General
Contractor:
The Beck Group,
Dallas, TX
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