by S Matthews and B Reeves (12-Jun-2012)
This Digest provides an overview of the advice given in BRE Report 511 entitled 'Handbook for the structural assessment of large panel system (LPS) dwelling blocks for accidental loading'. It gives guidance to professional engineers and owners on the structural assessment of an existing LPS dwelling block for accidental loads. It explains the fundamental aspects of undertaking such a structural assessment, describing the technical requirements, the objectives, and the sequence of technical activities involved.
Background to the requirements for undertaking a structural assessment
Overview of the LPS dwelling block research programme
Background to the form of construction of LPS dwelling blocks
Historical perspective on the structural assessment of LPS dwelling blocks and their vulnerability to progressive vertical collapse
Accidental actions and loads: overview of the hazards and risks
Acceptability of the risks associated with accidental loads in LPS blocks
Full-scale structural load tests on three existing LPS dwelling blocks
The requirements for structural assessment of LPS dwelling blocks for accidental loads
Recommended structural assessment procedure for existing LPS dwelling blocks for accidental loads
Methodology for through-life management of LPS dwelling blocks
Proposed assessment and inspection regimes, including suggested timescales for visual inspections, sampling of selected components, and full structural assessments.
Finally: a note on the risk of progressive collapse
6 line drawings, 4 photos