These viewing boxes offer visitors to the 427 metre high One Vanderbilt with a head for heights spectacular views of Madison Avenue and the city. Each box is a self-contained system suspended from the building by three tie-backs to the primary steel.
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In order to maximise transparency and provide an uninterrupted view, façade builder Gartner structurally bonded the glass and attached it with peg-like glass connections.
The glass comes from Eckelt
Guests access the 5.3 m high and 3.7 m wide glass boxes of the Summit One Vanderbilt via two exterior glass lifts. The floor glass is 1.55 metres wide up to the inside of the front glass. The front glazing is from Eckelt (A) and consists of 4 x 12 mm toughened safety glass, each with 1.52 mm SGP and an anti-reflective coating. Edged stainless steel sheets with structural silicone are bonded to the edge of the glass as a snow guard.
The movements of the building at the respective storeys are absorbed by movement joints around the perimeter of the boxes and therefore do not cause any further deformation in the glass construction.
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The glass surface is protected by an additional layer of wear-resistant glass to prevent the floor glass from breaking, for example due to falling objects. In tests lasting several weeks, Josef Gartner GmbH has proven that the glass has sufficient load-bearing, impact-bearing and residual load-bearing capacity.