Sky Bridges – The Opus and One Za'abeel

Jens Fussing
Technical Director
BG&E, Dubai

The OPUS is a truly unique development, located in the Business Bay district of Dubai, adjacent to the Burj Khalifa. The two towers are connected by a sculptured sky bridge, spanning 40m, the sky bridge is 4 storeys on one side and 6 storeys on the other, enabling the twin tower scheme to be imagined as a single structure.
The sky bridge when installed acts as the upper part of a portal framed structure.The bridge was installed with segmentally erected segments from each tower until they eventually joined in the middle.
The temporary platform to the soffit of the bridge served the purpose as platform for the façade installation.
The One Za’abeel Towers takes part of the DIFC development and is a mixed used development including Prince’s office, five six and seven star hotel, residential and office levels. The towers are interconnected with a 4 level deep steel sky bridge which is 230m long in total and cantilevering 65m out from the tallest tower.
In contrast to the Opus, this sky bridge is constructed on top of the permanent podium structure over an existing highway and then lifted up into position in a single lift. The bridge is located 120m up on the outside of the two towers, which are 300m and 240m in height. This induces large eccentricities and subsequent lateral movement of the towers which. The presentation will include construction of the bridge, deformation of the bridge, and control of building movements, as the two towers and bridge acts as a portal frame once unified.