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RAISING THE ROOF:

RAISING THE ROOF: Baco Contracts, a division of British Aluminium, is in the final stages of its £1.7M contract to supply and erect the central roof vent on the Millennium Dome at Greenwich. The 30m diameter 'dome cap' is made up from 12 segments each comprising five units which individually weigh up to 1.25t, and contains extractor fans and ventilators fitted with sensors to close them when it rains. Fabrication was by Highland Construction Services and Varley & Gulliver, conceptual design was by Buro Happold. Installation of the PTFE-coated glass fibre roof cladding is well advanced, with cladding subcontractor Birdair on schedule to finish before the end of June.

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