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Working details

STRUCTURAL ELEMENTS PROJECTING THROUGH A FACETED CURTAIN WALL

The building is 145m long, three storeys high on the south side and sloping down to give a more human scale on the north side which faces the river Clyde. It contains ice rinks and pools for training and leisure.

The main entrance is on the south, with administration, cafe, etc behind.

The structure consists of a threestorey concrete A-frame on the south side, enclosed by a faceted curtain wall. The A-frames are supported by 18 curved precast concrete columns or 'tusks' which run along the outside of the curtain wall and are reminiscent of the ribs of a ship. The main roof structure is a series of fabricated beams, which extend beyond the wall and are connected to ferrules cast into the tusks with stainless steel pins. The fabricated beams are supported inside the building by raked concrete columns.

The faceted curtain wall is made up of an outer layer of structurally glazed opaque glass panels, chosen to present an image of a watertight 'skin', and to resist the high humidity and harsh chemicals of the internal pool environment. They are backed with insulation and lined on the inside with Trespa solid-core laminate panels. The panel system is supported by curved extruded aluminium sections fixed to the roof and intermediate floors. The sections were rolled into a concave 'hour-glass' shape. They are slotted to receive T-shaped sections for fixing to the structure with vertical tolerance.

About 30mm of structural movement had to be accommodated at the eaves. The cladding is isolated from the roof structure by slotted head restraints fixed to the top of the aluminium support sections and by a curved coping/flashing which oversails the roof top sheet; it provides a positive and negative ventilation channel while preventing windblown ingress of snow and water.

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