Buildings, Office & Residential

Seven World Trade Center

© schlaich bergermann partner

The structural glass wall forms a transparent enclosure for the lobby of WTC 7 in Manhattan on the eastern facade of the tower facing Greenwich Street. The cable net wall incorporates tensioned high strength stainless steel cables to support the facade and resist lateral loads from wind, earthquake and blast.
A two-way system consisting of horizontal and vertical cables is tensioned against the base building structure where possible. The vertical cables are attached at the top to the concrete base structure, and at the bottom to the canopy girder. The horizontal cables are attached on both sides to the concrete base structure. Single-glazed, laminated, low-iron, frameless glass panels are attached to the cable net by cast stainless steel patch fittings, which forms the weather barrier to the building. The glazed entry canopy and the structure that supports the canopy consist of stainless steel boxes with special bolted site connections.

New York City, NY, USA
SOM, New York (building); James Carpenter Design, New York (facade)
Silverstein Properties, New York
Project Responsibility
Hans Schober
Facade, Glass


Technical Data

44 ft (13.4 m)
105 ft (32 m)
Glass panels
5 by 7 ft (approx. 1.5 m x 2 m)
Cable diameter
horizontal cables 7/8 inch (approx. 20 mm); vertical cables 11/16 inch (approx. 17 mm)
Canopy cantilever
12 ft (approx. 3.6 m)
Stainless steel boxes
Duplex Steel




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