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Eleven Times Square, New York City, New York
ACS Self-Climbing Technology Increased Productivity With Unsurpassed Safety
Eleven Times Square is a 40 story commercial office building located on the corner of 42nd Street and 8th Avenue in the midst of Times Square in New York City. This 600' (183 m) tall glass tower with 1.1 million ft² (102,193 m²) will offer spectacular views of the city from every floor. Interesting about this project is its architecture which features an outwardly sloping facade where the upper floors are larger than the floors below. This construction method is unique for New York because the reinforced concrete core is being constructed ahead of the structural steel which hasn’t been done in the city in over 40 years.
PERI supplied 11,500 ft² (1,068 m²) of VARIO formwork and its Automatic Climbing System (ACS) for crane free forming of the core walls.
A combination of ACS P (Platform) and ACS R (Regular) units allows for independent climbing of the interior and exterior formwork with no over-wall obstructions. This means that the reinforcement can be partially pre-fabricated and installed in mats. The ACS P units also provide generous storage areas in each of the three cells of the core. The ACS unit was designed to support the placing boom and self-climb with the formwork. PERI also incorporated trolley beams beneath each ACS P platforms to erect the structural steel on the interior of the core below forming operations. The enclosed perimeter of the ACS system keeps the crew safe and keeps building material from falling, which was of particular concern for this site location.
PERI also supplied an independent self-climbing platform on the exterior of the core for access to the ACS from the man lift. Secondary egress was provided by a suspended PERI UP stair tower within the core which climbs with the system.
Sorbara has been able to obtain a three-day floor cycle while saving an estimated 50% on manpower.
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Stanley Conrow
Foreman
"The design of the ACS system is very safe with panels that enclose the upper deck and working platforms. This makes our crew feel safe while preventing building materials from falling off. We would not be on our current three-day cycle without the PERI systems used on this site."
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