UK-based engineering practice Arup has completed the structural design for a 40-storey, one million ft² office tower development at 250 W. 55th Street in Manhattan, New York, US.
Arup, along with the US-based architectural firm Skidmore Owings and Merrill, has been appointed by Boston Properties to design the tower which features office space, a green roof, two podium levels and two basement levels.
The design of the tower incorporates a new viscous damping system into the outrigger and belt truss at the crown of the facility.
Arup said that the damping system will reduce building motion during wind storms and reduce the weight of steel by 10%, resulting in a cost saving of $5m.
The integration of seven small viscous dampers into the mechanical space at the top of the building preserved space within the facility that would have been occupied by a tuned-mass damper, thereby maximising rentable space in the building, Arup said.
Arup said it utilised building information modelling to deliver a coordinated and efficient design.
The new office building is expected to achieve LEED Gold certification from the US Green Building Council.
Boston Properties senior vice president of construction Robert Schubert said Arup’s engineering innovations helped the company save money and acquire more usable space per floor.
"The degree of coordination achieved with the Revit and Tekla models was extremely thorough, evidenced by the low number of RFI’s received for the entire steel fabrication and erection process," Schubert said.
Construction work on the project is expected to be completed in early 2014.
Image: The Manhattan office tower features office space, a green roof, two podium levels and two basement levels. Photo: Courtesy of Arup.