Off-the-frame brickwork: analysis of the data from Winterton House, London


The refurbishment of a 25-storey residential tower block using vertically restrained, off-the-frame brickwork is described, and long-term height variation data is reported. The cladding consisted of high water absorption, solid brickwork, and below the thirteenth floor the thickness increased from 271 mm to a maximum of 655 mm. No bricklaying problems were encountered, and the bricklayers were able to lay 440 bricks/day. The brickwork was pre-compressed against the existing steel frame at roof level, using a total force of 8400 kN. Changes in height were monitored for 3 years, during which time the initial brickwork pre-compression force was dissipated. It is proposed that lower values than current design recommendations were appropriate for the creep and irreversible moisture movement of brickwork. 12 refs.

Primary author(s): Bingel P R;Bown A;Brooks J J

Source: Struct.Eng.

             Vol.81, No.9, 2003, p.27-33


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