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Lightweight fill cuts piazza load

EXPANDED POLYSTYRENE proved a highly practical fill material during landscaping of the Stag Place Piazza near Victoria in London. The contract is believed to be the first use of cut-to-falls EPS to create different levels in a landscaped area.

Development of nearby Eland House as the new headquarters for the Department of the Environ- ment created the potential to develop a windswept and ill defined public space. Architect Renton Howard Wood Levin won

a competition organised by developer Land Securities and Westminster City Council for the project.

The site posed several problems, particularly that it was immediately above an under- ground car park, which restricted loads that could be applied. The problem was overcome by using 1,200m3 of Vencil Resil's Fillmaster EPS, the weight of which is only 1% that of traditional fill materials.

The EPS was delivered to site as lightweight blocks, up to 900mm thick, which were easily moved to position and cut to shape, generally to standardise and raise ground levels.

A variety of finishing layers are to be used, ranging from soil to pavoirs and concrete, and for this reason a 6mm thick top laminate was bonded to the Fillmaster to increase load spreading.

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