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Education the main entrance, are also linked into the central of roof,” comments Mr Naish. “It worked very well avenue. and there’s no doubt this roof structure couldn’t be The two steel-framed blocks will house an done in anything else than steel.” assembly hall, sports hall, dining room, kitchen and The roof will be covered with a metal decking administration offices. and to facilitate a quicker installation of this cladding “Steel was chosen for these structures because Haley has fabricated and erected all adjacent of the required long spans,” explains Duncan Overy, columns and beams with fixing studs already on. Project Manager for Arup. “The spans are 20m for Steelwork erection is also currently progressing the assembly and sports halls where column free rapidly at the Speedwell Technology College. Haley areas are important.” Haley erected these long is erecting 235t of steel on this site for two large spans with two beam sections, 14m long and 6m structures, either end of a predominantly concrete long, and splicing them together. school building. Above: Whitefield School will Mr Giltsoff says the covered street at Whitefield Speedwell is a four-storey development with have three teaching blocks separates the teaching blocks and provides the main a double-level assembly hall at one end, and two and two larger steel framed focus and hub within the school, combining the key sports halls at the opposite end. Throughout the buildings at the front. circulation, social and dining spaces. middle of the building, over the concrete frame Above near right: Whitefield’s covered street with its signa- The steel roof The steel roof structure there is also a steel roof. This area is to be glazed ture roof. that spans across the street and will give a bright, light area to the ‘street’ below. Above right: Approximately structure that twists and curves along This area gave Haley a challenge in that the erection 440t of steelwork will be its 100m length reflecting had to be over an open area where plant equipment erected at Whitefield. spans across the dynamism and activity could not enter. the street twists in the space below. The “Haley’s erectors had to climb and straddle twist is formed simply by the finished painted steel to access some areas,” and curves pivoting the steelwork about explains Mr Naish. This meant that the method along its 100m a horizontal axis, with the had to be planned, agreed and tested in advance to curve accentuated by the ensure everyone was aware of their actions during Below: The signature steel varied plan. erection and what they should do if there was alength. roof has a wave-like appear- The wave-like roof problem. ance formed with beams all has a varying width of between 6m to 14m and “Like Whitefield, this school has buildings set at different angles but all its undulating appearance is formed by a series requiring large open column-free areas and steel on the same axis. of crossbeams at 3.6m centres, all set at different was the obvious choice,” says Mr Naish. angles but on the same central axis. The assembly hall at Speedwell is a two-level “The clerestory glazing separates the roof and building measuring 25m by 20m and has 20m long the building parapets and allows it to float,” adds spans. Meanwhile, the two sports halls have equally Mr Giltsoff. “This in turn highlights the wave form, long spans and required Haley to deliver some long making it legible externally from around the site sections of steelwork to the site. perimeter, but more significantly allows dramatic All of the schools are in mainly residential internal street views of the curving soffit.” areas and access has been a slight problem, says The roof is unusual and Skanska was initially Mr Naish. “Getting steel onto site, especially at unsure how it would work out. “We decided at an Speedwell has been a bit problematical as the only early stage to erect a demonstration section of roof way in is via a narrow street where we have to next to our site offices,” explains Mr Giltsoff. “We negotiate around parked cars. Other than this all of wanted to be happy with the design prior to Haley the steelwork has so far gone to plan,” he adds. erecting its steelwork,” he adds. Steelwork has recently begun at the Brislington “We actually set out and erected a temporary Enterprise College, with Hartcliffe due to start later mock up at site of one of the more complex sections this year. NSC March 2007 19


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