WTC Oculus Project Crane Supports, Lower Manhattan, NYC

Project Location: World Trade Center, Lower Manhattan, NYC
Date: February 2012 - October 2012
Owner: Port Authority of New York & New Jersey
General Contractor: Skanksa-Koch
Steel Fabricators: MC Ironworks, Lehigh Valley, PA
Project Cost: $600,000
Tonnage: 150 tons of fabricated steel

Description: The "Oculus" structure, being erected at the base of the Freedom Tower, will serve as the new World Trade Center Transportation Hub for roughly 200,000 daily subway commuters. To erect the 11,000 ton transit station, the crane was placed below ground level and needed a stable platform over the course of the construction.

Skanksa-Koch contracted MC Ironworks (MCIW) to fabricate the steel structures that would support the crane tower. The supports required 16 critical full penetration welds on the skewed connections, as well as 20 partial joint penetration welds on the 20" tube connections. The need for critical welds also came with a critical timeline. The delivery of the tower supports needed to align with the delivery of the crane, so there was no room for quality or fit issues. To ensure a smooth assembly onsite, MCIW did a full assembly at their facility prior to shipping, making sure the top collar of the support structure had the proper fit to the base section of the tower. The crane supports were delivered on time with the superior welds expected by our customer.

Ultimately, the crane was raised 180' over the construction site on eighteen 10' tower sections, all supported by the base supports fabricated by MC Ironworks. The Oculus structure itself is being fabricated by Cimolai, San Giorgio Nogaro, Italy and is scheduled for completion in March of 2014.

WTC Oculus Project Photos

Crane Supports
 

Crane Supports
 

Crane Supports Closeup
 

Crane Support Assembled
 

Crane Support Onsite

(courtesy of Skanska-Koch)

Crane Support Onsite

(courtesy of Skanska-Koch)

Crane Support Onsite