U.S. Concrete's San Francisco Bay Area Operating Company Showcases Bay Bridge
Concrete Construction Milestones and Technical Achievements
EULESS, Texas, Sept. 4, 2013 (GLOBE NEWSWIRE) -- Celebrating the opening of
the San Francisco-Oakland Bay Bridge, Central Concrete Supply Co., Inc., a
business unit of U.S. Concrete, Inc. (Nasdaq:USCR), and the leader in
delivering low-CO concrete to the San Francisco Bay Area, has posted a
photo gallery showcasing the innovative concrete solutions deployed for the
Bay Bridge construction project. This Visual Album, "The Bay Bridge, A
Thirteen-Year Retrospective," provides visitors with a unique view of the
enormity of the Bay Bridge project.
Thirteen-Year Retrospective: Highlights
By the Numbers
Central Concrete started work on the San Francisco-Oakland Bay Bridge in 2001.
Twelve years later, Central Concrete has supplied over a quarter of a million
cubic yards of concrete—equivalent to covering a football field with concrete,
153 feet thick. At peak times, Central Concrete utilized four plants, 60
trucks at a time (using 136 trucks for the East Span Deck pour alone), and
multiple 12- to 16-hour pours, including several overnight placements.
The Bay Bridge project entailed a number of rigorous requirements, such as
concrete durability, CO[2 ]reduction, rapid setting and pumpability. To meet
these requirements, Central Concrete engineered more than 40 specialty mixes,
leading to many new performance milestones. Not only were the mixes optimized
to deliver the aggressive performance specified for this large-scale,
technically challenging project, but Central Concrete's use of 25 percent to
50 percent cement replacement materials significantly reduced the Bay Bridge's
carbon footprint. The low-C0 mix designs resulted in at least 60 million
pounds of CO reduction, as compared to traditional Portland cement
"Central Concrete, at every turn, was ready to take on the uncompromising
demands presented by the Bay Bridge Project," said Greg Allen, project manager
for MCM Construction, one of the lead contractors on the bridge project. "We
selected Central Concrete for their deep technical expertise, outstanding
problem-solving skills, and ability to deliver the highly engineered mixes
required for this job. At the same time, they offered the broad and deep
resources necessary for this enormous project, while running their business
with the personal care seldom found in large companies."
"Central Concrete is uniquely capable to develop and produce high performance
and highly sustainable concrete in the Bay Area," said Tarek Khan, market
development manager, for BASF Construction Chemicals, Admixtures
Systems."Central Concrete's technical team, research laboratory, production
capabilities, and their management's focus on innovative, sustainable concrete
have put them in a class by themselves to meet technical and operational
challenges like the Bay Bridge project."
Three-Day Demolition and Roll-in, Labor Day Weekend 2007
Labor Day weekend 2007, crew members began a campaign dubbed by C.C. Myers,
Inc., the lead contractor for this project, as "We rocked, it rolled."
Following closure of the bridge at 8:49 on Friday night, team members removed
a football field-size section—348 feet long by 75 feet wide—of the San
Francisco Bay Bridge deck on Yerba Buena Island, rolling in a pre-constructed
replacement span and placing the replacement concrete.
Within 49 hours, each of the 48 deck and beam sections, weighing an average of
85 tons, was hoisted and removed. Crews then began the roll-in of the 6,700
ton replacement structure built by C.C. Myers, Inc. The new structure was
moved into place in just under two hours; the teams quickly installed the
joint seals in preparation for the last steps: the concrete placement and
To meet the aggressive schedule, Central Concrete engineered a concrete mix
with extremely fast strength gain. Central's ability to deliver a concrete mix
that was ready for vehicle traffic within four hours contributed to the team's
ability to have the bridge striped and open to traffic at 6:00 p.m. Monday—11
hours ahead of the opening deadline of Tuesday at 5:00 a.m.
Designing for the Famous Bay Bridge S-Curve 2005-2008
A key challenge presented to Central Concrete was how to design a concrete mix
for the famous Bay Bridge S-curve—a temporary structure, connecting the older
eastern span of the Bay Bridge to Yerba Buena Island that acted as a detour
while teams built a new bridge structure. Working with general contractor C.C.
Myers, Inc. and subcontractor Conco, Central Concrete designed a concrete mix
that could: (1) be pumped across an extraordinary distance of 2000 feet
including 300 feet vertically; (2) achieve very high strength properties; and
(3) be easily supported by the steel superstructure.
Central Concrete worked with BASF, the leader in developing chemical
admixtures for concrete, to design solutions to meet these aggressive
requirements. Through leading-edge chemistry and material science expertise,
Central and BASF engineered a highly flowable, lightweight concrete that
achieved the required compressive strength and other durability requirements.
The concrete mixes for this application, along with the other mixes for the
Bay Bridge, underwent extensive testing in Central Concrete's Lab and then
verified by San Jose State University's Civil Engineering department.
"Central Concrete's performance on this complex project was exceptional," said
Bob Coupe, project manager for C. C. Myers, Inc. "Their technical and
operational capabilities coupled with their dedication to project safety
contributed greatly to the success of the project. They were an integral part
of the team."
Final Deck Section Placed, March 2013
The final deck of the San Francisco-Oakland Bay Bridge's East span was placed
on March 9, 2013, creating the finishing section of the Bay Bridge's
cast-in-place concrete roadway decks.
Beginning at 7:00 a.m. on March 9th, 136 Central Concrete trucks began
delivering 1,266 cubic yards for the Oakland Touchdown eastbound roadway. The
1,079-foot section—an area equal to about two city blocks—was placed and
finished within nine hours. The completion of the East Span ensured that the
westbound and eastbound lanes of the new bridge would open to traffic
simultaneously, a key milestone set for the 2013 Labor Day Opening. To learn
more about the March 9, 2013 placement, go to: ABC KGO Video
Central Concrete would like to acknowledge these outstanding partners that
made this massive undertaking possible:
*American Bridge/Fluor JV:
*California Department of Transportation, http://baybridgeinfo.org
*San Jose State University Civil Engineering Department
*C.C. Myers, Inc., http://www.ccmyers.com
*Flatiron Construction Corp., http://www.flatironcorp.com
*Kiewit Infrastructure Group, http://www.kiewit.com
*MCM Construction, Inc., general contractor:
*Condon Johnson & Associates, Inc., http://www.condon-johnson.com
*Murga Strange and Chalmers
About Central Concrete
Central Concrete Supply Co., Inc., a business unit of U.S. Concrete, Inc.
(Nasdaq:USCR), has been serving the San Francisco Bay Area for more than 60
years. The company is recognized for engineering higher-performing concrete
than traditional concrete, while significantly lowering carbon footprints with
its low-C0 mixes.
Unlike traditional concrete, Central's standard mixes deliver 50% or greater
cement replacement materials, thereby significantly reducing the carbon
footprint of the project under construction. Central Concrete is recognized
for supplying its low-CO mixes to numerous San Francisco Bay Area signature
projects, including the Cathedral of Christ the Light Church, Oakland;
California Academy of Sciences, San Francisco – the world's greenest museum;
NASA Ames Sustainability Base, Mountain View – the greenest federal building
in the U.S.; David and Lucile Packard Foundation, Los Altos – largest net-zero
private office building in Calif.; the San Francisco Public Utilities
Commission (SFPUC) headquarters – San Francisco's greenest office building;
and the new Santa Clara 49er Stadium.
With 12 locations in the San Francisco Bay Area, Central Concrete offers
multiple points of service to meet the diverse operational needs of its
customers.For more information, visit www.centralconcrete.com.
About U.S. Concrete
U.S. Concrete services the construction industry in several major markets in
the United States through its two business segments: ready-mixed concrete and
aggregate products. The Company has 105 fixed and 10 portable ready-mixed
concrete plants and seven producing aggregates facilities. During 2012, U.S.
Concrete produced approximately 4.8 million cubic yards of ready-mixed
concrete and approximately 3.3 million tons of aggregates. For more
information on U.S. Concrete, visit www.us-concrete.com.
CAUTIONARY STATEMENT REGARDING FORWARD-LOOKING STATEMENTS
This press release contains various forward-looking statements and information
that are based on management's belief, as well as assumptions made by and
information currently available to management. These forward-looking
statements speak only as of the date of this press release. The Company
disclaims any obligation to update these statements and cautions you not to
rely unduly on them. Forward-looking information includes, but is not limited
to, statements regarding: the stability of the business; encouraging nature of
second quarter volume and pricing increases; ready-mix backlog; ability to
maintain our cost structure and the improvements achieved during our
restructuring and monitor fixed costs; ability to maximize liquidity, manage
variable costs, control capital spending and monitor working capital usage;
and the adequacy of current liquidity. Although U.S. Concrete believes that
the expectations reflected in such forward-looking statements are reasonable,
it can give no assurance that those expectations will prove to have been
correct. Such statements are subject to certain risks, uncertainties and
assumptions, including, among other matters: general and regional economic
conditions; the level of activity in the construction industry; the ability of
U.S. Concrete to complete acquisitions and to effectively integrate the
operations of acquired companies; development of adequate management
infrastructure; departure of key personnel; access to labor; union disruption;
competitive factors; government regulations; exposure to environmental and
other liabilities; the cyclical and seasonal nature of U.S. Concrete's
business; adverse weather conditions; the availability and pricing of raw
materials; the availability of refinancing alternatives; and general risks
related to the industry and markets in which U.S. Concrete operates. Should
one or more of these risks materialize, or should underlying assumptions prove
incorrect, actual results or outcomes may vary materially from those expected.
These risks, as well as others, are discussed in greater detail in U.S.
Concrete's filings with the Securities and Exchange Commission, including U.S.
Concrete's Annual Report on Form 10-K for the year ended December 31, 2012 and
subsequent Quarterly Reports on Form 10-Q.
CONTACT: Company Contact:
Marketing Communications, U.S. Concrete
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