In May, 2012 the 1 World Trade Center tower
established itself as the tallest building in New
York City, surpassing the city’s iconic Empire
State Building. As the tower continues to rise
in the New York City skyline, it will eventually
take its place as the 3rd tallest building in the
world, with its spire reaching a symbolic 1,776
feet into the air (a reference to the year of the
U.S.A’s independence).
The building began the climb from a 185'
concrete base, located on the northwest corner
of the World Trade Center site, where in
November 2006 400 cubic yards of concrete
were poured on the building’s foundation.
In May 2008, the concrete core rose to street
level and has continued to ascend at a rate
of approximately one floor per week. When
construction is complete, more than 200,000
cubic yards of concrete (more than three
times the concrete used for the Empire State
Building) will have been poured at 1 WTC
and concrete contractor Renzo Collavino of
the Collavino Group is responsible for all of it.
Among the many preparations for such a massive
undertaking, The Collavino Group sought
a product solution that would standardize the
above-grade core wall to slab connections
in order to meet the high-profile project’s
aggressive construction schedule. Working
closely with Dayton Superior’s National Sales
Manager Don Van Gerve and Barker Steel, The
Collavino Group selected Dayton Superior’s
D55 MetalStrip for the task. In addition, the
Collavino Group utilized a number of Dayton
Superior products including bar supports,
rock anchors, coil rod, nuts, plates, grout
and form release, making Dayton Superior a
significant provider of product solutions for
the 1 WTC structure.
“When we build with concrete, we use Dayton
Superior product solutions and application
engineering to optimize our efficiencies,” said
Renzo Collavino, president, Collavino Group
and concrete contractor for 1WTC.