National September 11 Memorial Museum Pavilion
The National September 11 Memorial Museum resides in the space between where the Twin Towers once stood in New York City. designed by Snøhetta with Handel, Zahner manufactured the custom facade skin for the building. The architects worked with Zahner engineers and designers in the Design Assist team to develop the facade system. Zahner unitized the metal systems in Kansas City and then shipped everything to the job site for installation.
Cooper Union's 175,000-square-foot, $111.6 million addition, known simply by its street address, 41 Cooper Square, covers the full block on Third Avenue from East 6th to East 7th in downtown Manhattan, bordering the East Village. Designed by Morphosis and engineered and installed by Zahner, the building's futuristic facade is strikingly different and unlike anything else around it.
Developing the 911 Museum Metal Facade
The panels were tested for wind loads and water permeability at a special facility. The panelization method used for the project required welding studs to the reverse of each panel. Fabricators weld with the engineered settings so that the studs don't show on the face of the panels.
The surface of the metal shell alternates between GB-60 polish and a No. 4 polish on stainless steel. The No. 4 polish has greater reflectivity along a linear grain, while the GB-60 surface scatters light for a more diffused look. This alternation repeats itself as a motif in not only the stainless steel facade, but also across the fenestration surface.