Architect and Builder April/May 2019 | Page 20

Design The precinct and the building in particular aim to be respectful of the public environment. As such, at ground level, the building’s edges are set back to give walking shelter and are activated by high street retail and the entrances of the office buildings above. Designed by GLH Architects, the architecture of the building is modern, humble and timeless with an open and permeable character. Clear glass married with the warmth of natural stone provide for a soft palette of materials. The attractive wedge-shape design is notable for its glass façades, created with 4,500m 2 of glazing. This design enhances the wellbeing of the building’s users allowing ample fresh air, particularly unimpeded access to external vistas looking east over Johannesburg’s treed suburbs and plenty of natural daylight. The emphasis of the building is on the Oxford Road façade with the other two façades being downplayed as they are only visible at acute angles through the pedestrian streets of the precinct. The Oxford Road façade is east facing and consists of double façade clear glazing flanking the frameless atrium glazing. The transparency of the façade is complemented by the dynamism of the motorised blinds linked to a weather station that are tracking the light along the day, protecting the office space in the morning and opening fully once the sun has passed the corner. To deal with the sun’s heat through the glazing without overloading the air conditioning system, a couple of innovations have been included. The first is a double-ventilated façade on the front of the building, involving two layers of glazing some 40cm apart. The outside layer is open at the bottom and at the top, allowing air to rise and exit this vertical channel as it heats, sucking in cooler air at the bottom and keeping the building cool. Interior The atrium provides for a seamless transition between the outside and the inside of the building, allowing for reception functions, lounges, vertical circulation and distribution. This open, vibrant and bright space brings departments and people together. The observation lifts overlooking Oxford Road contribute to the pleasurable journey through the building. The office spaces are an unencumbered rectilinear ‘L’ shaped space with the core at its centre allowing maximum sub-divisibility of the space in departments or separate tenants. This sub-divisibility of the building is further increased thanks to the double lift bank system that allows for a main tenant operating from one lift bank 20 199 Oxford