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The architect, engineers and contractors have worked together to produce a stunning and sustainable building

The external timber cladding adds to the stunning look

An artist’s impression of the Velodrome site

audited from extraction from the ground back through to disposal following future demolition.’

Smart attack Intelligent systems have been used to ensure that the building is as energy effi cient and user friendly as possible. Ventilation and lighting systems feature presence detection in many instances, and there is daylight control and presence detection on the lighting system itself. All the lighting is monitored in real time and reports back to a central PC, where the status of emergency and standard luminaires can be monitored. Access control, CCTV and the intruder systems are also monitored back from the same point, while water supplies to public toilet areas are fi tted with solenoid valves so they are automatically isolated when not being used. A BMS systems is also used to monitor and control opening windows and dampers to provide free cooling and night time purge ventilation to the building in summer time. Each company working on the site also had to demonstrate

a green approach to its work. To this effect, Imtech limited deliveries onto the site and made sure that light fi ttings were delivered to site in pallets instead of in separate boxes.

About the author

Rob Shepherd Rob Shepherd is a freelance journalist who has worked in the electrical contracting industry for more than 10 years, most recently as editor of Electrical Contracting News (ECN).

Bright thinking The lighting inside the Velodrome is a key element of its design, and there’s more than £1 million worth of lighting products in the roof. These were assembled at ground level and then lifted into place in sections of up to 63m in length. The lighting is confi gured on 4m sections of rack-based containment that are bolted on to the roof and support the lights, the PA/VA and their associated wiring. London 2012 will be broadcast in high defi nition around

30 ECA Today May 2011

the globe, and in order to meet the demands of this format, the Velodrome contains 258 lights, giving the building a light output of 2000 Lux. However, when this isn’t required the lighting control system can bring the Lux level down. The lighting control system also facilitates daylight dimming

and incorporates presence detection, while 89 linear strips let natural daylight in through the roof. Some 24km of YY OHLS fl exible installation cable was used to power the lighting and was chosen so that contractors can lay it straight into the cable tray and it will stay fl at, reducing the need for fi xings and making it quick and simple to use. Brunton considers the installation of the high level

fl oodlighting as the single most signifi cant achievement in the project. He explains: ‘We had to have the fl oodlighting installed by a specifi c date so that Ron Webb of RV Webb, who was commissioning the cycle track, could come in and sign it off. He was booked to come in and this date could not be changed. We managed this with about three hours to spare, and meeting this deadline went a long way in ensuring that the project was completed on time.’

Problem solving Some extremely challenging M&E services coordination issues were identifi ed very early on in the programme and required some innovative thinking to solve. Due to the fact that the building has a curved structure, Imtech G&H realised that the initial coordination strategy wouldn’t work, causing a major headache all round. Brunton takes up the story: ‘Once we realised we had

a problem we decided to draw a CAD-based 3D model of the services in that area, which wasn’t cheap and involved the assistance of the design team and the architect to fi nd a

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