set up as a straight line linking the various units. However, this was seen spatially as too linear and thus the form evolved into something more serpentine; this generated a more interconnected space and was more easily accommodated on the site. This approach proved to be very successful in presentations to the tenant, but it was ultimately the architecture that won the commission. A central core of circulation and services ties the building together and the various areas are linked by a series of bridges. The major challenge was the site which is on a curving edge of Katherine Street, and to ensure a large building of 68,000m 2 could be accommodated and well connected both vertically and horizontally. The building leaps the boundary of
the commercial edge of Sandton to sit as a floating glass box hovering above an indigenous parkland.
Façade The glass façades were carefully engineered with Pure Consulting and Paul Carew from PJC Consulting to ensure that this 5 Star Green Star design satisfied performance and aesthetic requirements. The glazing is a combination of reflective glass spandrels and vision glass which combine to form a unified crystal façade.
The external façade is interesting in that it comprises floor to floor unitised double glazed panels of vision glass and spandrels. The shapes and glass variations are encapsulated in each
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