072
OLYMPIC GAMES / VELODROME, LONDON, UK
REDUCE, REUSE, RECYCLE
Hopkins Architects’ Velodrome was one of the first Olympic Park venues to be completed back in January 2011. Draw- ing inspiration from the ergonomic beauty and efficiency of a modern racing bike, the design features a distinctive hyperbolic paraboloid roof and cedar-clad upper bowl structure that echo the racing track inside. A public concourse runs around the venue, separating the upper and lower seating tiers – visible from the outside as a glazed band that wraps around the venue’s base. Hopkins Architects worked with BDSP who carried out the internal and external light- ing designs and set out the track lighting criteria based on CIBSE recommendations, HDTV requirements and experience gained from previous Olympic Velodromes. BDSP in turn appointed a specialist lighting manufacturer to carry out the design and
implementation of a track lighting system that would meet the needs of both ‘games time’ and ‘legacy mode’ use, as well as fit- ting elegantly within the structure. The team established a series of objectives for the lighting scheme: • To use arena lighting for access, security and to provide secondary lighting should a power failure occur during an event or training. • To provide an uninterruptable power sup- ply to maintain a minimum of 50% of the lighting output on power failure or ‘brown out; for cycling safety and to allow events to continue. • To provide appropriate lighting levels for different modes of use, including training, elite training, events and broadcast events. • To provide sufficient glare- and shadow- free daylight to allow training without the
need for artificial lighting for significant. parts of the year (during daylight hours). • To allocate groups of lighting that will be used in alternation to ensure running hours for lamps are evened out. • To develop a containment and support system that integrates with the roof design to allow for wind movement and avoid excessive ‘clutter’. • To locate fitments in a way that will increase ease of maintenance. The team developed a solution that uses 1000W double-ended, 90,000 lumen discharge lamps with Ra 90 and Tc 5600 to cover the track and infield areas. The floodlight enclosures have highly efficient optics, precision aiming and separate control gear housings. A common lamp size and type is used throughout and the optical control uses various optics within a common
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