Construction World December 2018

kilometer of high performance full vision glazing. The construction of the atrium sky light was a first of its kind in SA by utilising a gantry crane fixed on a set of rails/tracks to complete the glazing installation. Environmental impact consideration The area in which the project is situated is considered highly developed and as such, the environmental sensitivity of the surrounding land is considered low. There were however a few potential adverse impacts identified prior to construction, which were minimised as follows: Water The prevention of stormwater pollution was prioritised on this project, and the following mitigation measures were implemented: • Stormwater inlets were protected by means of silt traps to prevent any sediment or debris from being washed down into the system. • The roads were kept clean and free of debris through daily sweeping. • Care was taken to prevent spills by making use of drip trays and any activities which could result in spills were undertaken in a controlled manner. Air Quality Dust may impact on the health and safety of employees and impact on the surrounding community through respiratory, visual and aesthetic impacts. The following measures were implemented for reducing and managing these impacts: • Dust suppression by means of watering was done throughout the project, especially on exposed soil surfaces and during windy conditions. • Service providers transporting loose/fine material were required to make use of tarpaulin to cover their loads. • Plant and equipment used on the project were always kept in good working condition to ensure that fumes were kept to a minimum. Noise Construction only took place during specified hours and neighbours were informed of any noise generating activities which would have a higher impact. A Complaints Register was kept on site at all times to record any complaints. Soil Contamination of soil from accidental spills was prevented by ensuring that the correct storage, handling and refueling procedures were followed. Soil protection measures included the use of drip trays, ground sheets and mixing trays. Site Access and Traffic In order to prevent congestion of traffic and reduce emissions from vehicles the following measures were implemented: • Deliveries of materials only took place at designated areas and under strictly controlled conditions to minimise traffic disruption. • Construction vehicles were restricted to designated routes. • Safe pedestrian walkways were provided for passers-by. Green building aspects The new Discovery Head Office is the largest new build project to receive a 5 Star Green Star rating from the GBCSA to date. Features of the new building which have contributed to the rating

include high-efficiency air conditioning that leverages an outside air economy cycle and indoor air CO 2 monitoring. Added to this is the low- energy lighting, occupant control and daylight optimisation in conjunction with a fully automated “sun tracking” louvre blinds system, as well as the building’s high-performance double-glazed curtain wall. Other sustainable building features include but are not limited to the following: • By implementing a comprehensive Waste Management Plan from project inception to project completion, more than 70% of all demolition and construction waste was diverted from landfill through reuse/recycling; • There was in excess of 30% replacement of Portland Cement by industrial waste products for all concrete used in the project which allowed for the reduction in mining of natural resources and Green House Gas emissions associated with cement production; • At least 20% of all construction materials that were selected for the project were sourced and manufactured within a 400 km radius from the site, reducing the impact of long distance transportation emissions on the environment; • Exposure of building occupants to air pollution was minimised by using and installing low VOC paints, adhesives & sealants and flooring systems (carpets and vinyl); and • All insulation, refrigerants and gasses installed in the building have an Ozone Depletion Potential (ODP) of zero, thereby ensuring no further long-term damage to the ozone layer. Health & Safety Health & Safety being the TWJV’s highest priority throughout the duration of the project. With a project of this magnitude, there are very few things that can be said to justify the challenge it was to ensure the safety of all staff on the project and to ensure a safe working environment for all, all of course was made up of around 3 400 staff on site. TWJV are proud to have been awarded the following achievements over the duration of the project: • 2015 MBA Regional award (2 nd Place) (Super Category 750 m+) • 2016 MBA Regional award (1 st Place) (Super Category 750 m+) • 2016 MBA National award (2 nd Place) (Super Category 750 m+) • 2017 MBA Regional award (3 rd Place) (Super Category 750 m+) Milestones/objectives achieved on the project include: • Personal growth by numerous employees and management involved on the project • Continuous improvement by numerous contractors towards health and safety compliance and a total buy into safety principles on site. • Learning from previous incidents and incorporating measures to prevent further similar incidents from occurring. • Striving for a zero tolerance approach to any form of unsafe acts and conditions on site. • Only one prohibition notice was issued by the Department of Labour Quantifiable time, cost and quality “Quality Assurance of the Discovery Project was of the utmost importance and essential to both Tiber and WBHO. We developed the building to the best quality, as we knew that if we did not, it could have

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