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Report BR 463 Backprop forces and deflections in flat slabs: construction at St George Wharf
Publication Year
2004
Document Status
Archived
Abstract
Aims to investigate the validity of the conclusions drawn from previous work on deflection at the European Concrete Building Project’s in-situ concrete frame building at Cardington, which showed that slab deflections can be increased significantly by cracking induced by construction loading. Measurements of backprop forces at Cardington showed that the peak construction load on a slab occurs when the slab above is cast. Analysis of backprop forces measured at Cardington showed that the upper floor in a supporting assembly carried a greater proportion of the load from casting the slab above than that given by the conventional assumption that the load is shared equally between floors. The generality of this conclusion was investigated at St George Wharf by measuring backprop forces during the construction of floor 6, and concludes that the research into construction loading and deflection at Cardington are valid for practical purposes.
Document History
Whilst this publication can still be purchased some of the information in it has been superseded by more recent research and standards. The BRE Group does not accept any responsibility whatsoever for any loss or damage, including - without limitation - indirect or consequential loss or damage arising from use, or loss of use, of data or profits arising out of, or in connection with, the use of this document.
Author
Vollum, R.
ISBN
9781860816642
Publisher Information
BRE
BRE is a building science centre that generates new knowledge through research. This is used to create products, tools and standards that drive positive change across the built environment. BRE helps its government and private sector clients meet the significant environmental, social and economic challenges they face in delivering homes, buildings and communities. BRE is owned by the BRE Trust, a registered charity. The Trust uses the profits made by the BRE companies to fund research and education that advances knowledge of the built environment.
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