Structural Glass Observation Boxes (Willis Tower Ledge)

The 1,350 foot high Willis Tower (formerly known as Sears Tower) was looking for a grand attraction for their Skydeck in 2008. Few structures in the world have glass floors (both interior and exterior), and almost all are continuously supported along their edges with steel supports. In order to cre...

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Autores principales:	T. McDonnell, D. Thompson
Formato:	article
Lenguaje:	EN
Publicado:	Challenging Glass Conference 2010
Materias:	Structural Glass Laminated Tempered Clay industries. Ceramics. Glass TP785-869
Acceso en línea:	https://doaj.org/article/d670f69298bb4814b9ba215c0ca0959c
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spelling	oai:doaj.org-article:d670f69298bb4814b9ba215c0ca0959c2021-12-04T05:12:46ZStructural Glass Observation Boxes (Willis Tower Ledge)10.7480/cgc.2.23112589-8019https://doaj.org/article/d670f69298bb4814b9ba215c0ca0959c2010-05-01T00:00:00Zhttps://proceedings.challengingglass.com/index.php/cgc/article/view/56https://doaj.org/toc/2589-8019 The 1,350 foot high Willis Tower (formerly known as Sears Tower) was looking for a grand attraction for their Skydeck in 2008. Few structures in the world have glass floors (both interior and exterior), and almost all are continuously supported along their edges with steel supports. In order to create a dramatic, unimpeded view of the City of Chicago the Skydeck Owners conceived of a glass platform that would protrude out of the building envelope and enable tourists, guests, and long time residents of the City to walk outside the building and look down the 1,350 foot exterior to the sidewalk below and have un-impeded views of the city. The structural glass floor system was designed to be supported by glass wall panels on three sides. In addition, the entire platform was constructed to be movable; into and out of the building. By allowing the glass observation box to move it could be constructed on the interior of the building and enable the automated window washing system for the rest of the building to continue functioning un-obstructed as well. Every piece of glass on this structure is designed to carry pedestrian loads and work with elegant connections that are at once exposed and architecturally sculpted to disappear when the view of the city is observed by the guests on top of the highest structural glass floor in the world. In addition to gravity loads, and coordinating the retraction mechanism, the glass was designed with attention to redundant laminates and supports, according to the buildings high wind loads, and requiring special permissions by the City of Chicago for construction to begin. T. McDonnellD. ThompsonChallenging Glass ConferencearticleStructural GlassLaminatedTemperedClay industries. Ceramics. GlassTP785-869ENChallenging Glass Conference Proceedings, Vol 2, Iss 1 (2010)
institution	DOAJ
collection	DOAJ
language	EN
topic	Structural Glass Laminated Tempered Clay industries. Ceramics. Glass TP785-869
spellingShingle	Structural Glass Laminated Tempered Clay industries. Ceramics. Glass TP785-869 T. McDonnell D. Thompson Structural Glass Observation Boxes (Willis Tower Ledge)
description	The 1,350 foot high Willis Tower (formerly known as Sears Tower) was looking for a grand attraction for their Skydeck in 2008. Few structures in the world have glass floors (both interior and exterior), and almost all are continuously supported along their edges with steel supports. In order to create a dramatic, unimpeded view of the City of Chicago the Skydeck Owners conceived of a glass platform that would protrude out of the building envelope and enable tourists, guests, and long time residents of the City to walk outside the building and look down the 1,350 foot exterior to the sidewalk below and have un-impeded views of the city. The structural glass floor system was designed to be supported by glass wall panels on three sides. In addition, the entire platform was constructed to be movable; into and out of the building. By allowing the glass observation box to move it could be constructed on the interior of the building and enable the automated window washing system for the rest of the building to continue functioning un-obstructed as well. Every piece of glass on this structure is designed to carry pedestrian loads and work with elegant connections that are at once exposed and architecturally sculpted to disappear when the view of the city is observed by the guests on top of the highest structural glass floor in the world. In addition to gravity loads, and coordinating the retraction mechanism, the glass was designed with attention to redundant laminates and supports, according to the buildings high wind loads, and requiring special permissions by the City of Chicago for construction to begin.
format	article
author	T. McDonnell D. Thompson
author_facet	T. McDonnell D. Thompson
author_sort	T. McDonnell
title	Structural Glass Observation Boxes (Willis Tower Ledge)
title_short	Structural Glass Observation Boxes (Willis Tower Ledge)
title_full	Structural Glass Observation Boxes (Willis Tower Ledge)
title_fullStr	Structural Glass Observation Boxes (Willis Tower Ledge)
title_full_unstemmed	Structural Glass Observation Boxes (Willis Tower Ledge)
title_sort	structural glass observation boxes (willis tower ledge)
publisher	Challenging Glass Conference
publishDate	2010
url	https://doaj.org/article/d670f69298bb4814b9ba215c0ca0959c
work_keys_str_mv	AT tmcdonnell structuralglassobservationboxeswillistowerledge AT dthompson structuralglassobservationboxeswillistowerledge
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Structural Glass Observation Boxes (Willis Tower Ledge)

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