Best Practice Guidance for Hybrid Concrete Construction A guide to choosing and using combinations of precast and in-situ concrete for better value structural frames C. H.Goodchil H.Goodchild d BSc,CEng, MCIOB,MIStructE J. Glass BA,Dip Arch,DipBRS, PhD,ILTM
Acknowledgements The Concrete Centre acknowledges and appreciates the support given by many individuals, companies and organisations.These include: The Advisory Group John Caine Curtins Consulting Engineers Norman Brown ABC Structures Clive Budge British Precast Concrete Federation Mike Downing Downing Associates CharlesMcBeath whitbybird Rob Moura Ascon/Edmund Nuttall Chris Packer HBG Construction Mahesh Parmar Anthony Hunt Associates Ltd Martin Southcott The Concrete Centre Russ Wolstenholme W S Atkins for DTI
Interviewees and Participants at Workshops MatthewAllen Sir Robert McAlpine Design Group Roger Bailey Tarmac Precast Concrete Ltd Graham Beardwell Ove Arup & Partners (M&E) Andy Butler Stanhope plc PeterCarruthers Sir Robert McAlpine Ltd Ian Cordingley Upton McGougan Consulting Engineers Mike Crook HOK Sport Ian Curry AMEC John Cutlack Jan Bobrowski & Partners Brian Cutler Independent Consultant Phil Doyle Sheppard Robson Architects Chris Edwards HBG Construction Adrian Falconer Ove Arup & Partners Jim Farley Sir Robert McAlpine Ltd Ian Feast Hammerson plc Andy Fereday Miller Construction Jack Gabrielcyzk Taylor Whalley Spyra
Tony Giddings Argent Group Kevin Gill Gill Associates Ray Hull Byrne Brothers Ltd Rob Jones Davis Langdon and Everest Simon Lake Toyota GB Suqlain Mahmood Sir Robert McAlpine Design Group Bob Martin Bison Concrete Products Gavin Murgatroyd Gardiner & Theobald Dominic O’Neill Fitzroy Robinson Robert Reed HBG Construction Martyn Reeve Sir Robert McAlpine Ltd Peter Rogers Stanhope plc David Rose Ipswich Town FC PeterStackhouse Lyons Sleeman & Hoare Thierry Suc Upton McGougan Consulting Engineers George Tootell CV Buchan DennisVittle The Marble Mosaic Company Ltd David Walker Trent Concrete Ltd Russell Woby Hoopers Architectural Services
Researchers on ‘Hybrid Concrete Construction for the UK Market’ Ghassan Aouad University of Salford Bousmaha Baiche Oxford Brookes University Peter Barrett University of Salford Pal Chana BCA (formerly of Imperial College) Charles Fowler RPEG, University of Reading Colin Gray RPEG, University of Reading Rod Webster CiD Dedicated to Gerry Shaw .
Published by The Concrete Centre on behalf of industry sponsors
Riverside House, 4 Meadows Business Park,Station Approach,Blackwater,Camberley,Surrey GU17 9AB Tel: +44 (0)1276 606800 Fax: +44 (0)1276 606801 TCC/03/09 Published September 2004 ISBN 1-904818-09-9 Price Group L © The Concrete Centre All advice or information from The Concrete Centre is intended for those who will evaluate the significance and limitations of its contents and take responsibility for its use and application. No liability (including that for negligence) for any loss resulting from such advice or information is accepted by The Concrete Centre or their subcontractors,suppliers or advisors.Readers should note that The Concrete Centre publications are subject to revision from time to time and should therefore ensure that they are in possession of the latest version. Front cover:Inland Revenue,Nottingham, interior of building. Photo: Martine Hamilton-Knight/Built Vision.Architect: Michael Hopkins & Partners. British Precast is the trade federation representing the UK precast and concrete masonry industry.The Structural Precast Association is a member of British Precast and is supporting this publication.Website:www.britishprecast.org Tel: 0116 253 6161. CONSTRUCT is an association of member companies dedicated to the task of improving the construction efficiency of in-situ concrete frames and associated structures. For further details contact the Secretary on
Best Practice Guidance for Hybrid Concrete Construction Contents 2. Introduction
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3. Why use Hybrid Concrete Construction?
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1. Executive summary
4. Best Practice Guidance for Hybrid Concrete Construction 5. Achieving best practice 6.Case studies
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Ipswich Town Football Club: North Stand
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Toyota (GB) Headquarters
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West Car Park, West Quay, Southampton Whitefriars, Canterbury 7. Conclusions 8. References and further reading Appendix: Background research
A.1 Context A.2 Best Practice Guidance for Hybrid Concrete Construction research project A.3 Structural design
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1 Executive summary
Introduction 2
Executive summary
Introduction
Hybrid Concrete Construction (HCC) is about providing best value in structural frames. HCC provides simple, buildable and competitive structures that answer client demands for better value. It meets industry requirements for increased prefabrication, increased off-site activity,safer and faster construction and consistent performance.
Hybrid Concrete Construction (HCC) combines all the benefits of precasting (e.g. quality, form, finish, colour, speed, accuracy,prestressing) with all the benefits of in-situ construction (e.g. economy, flexibility, mouldability, thermal mass, continuity,durability, and robustness).HCC can answer client demands for lower costs and higher quality by providing simple, buildable and competitive structures that offer consistent performance and quality.
Despite the challenges thrown down by the Latham 2 and Egan 3 reports and their successors, the UK has been slow to realise the benefits of HCC.One of the barriers to HCC’s more widespread use was found to be the lack of comprehensive guidance, a situation which this publication aims to change.
To date,the use of HCC has been confined mainly to bespoke structures. Some of these structures achieved cost savings of up to 30% over more conventional structural frames. Naturally,the concrete industry was eager to identify how this order of saving might be achieved consistently and more widely.As well as responding to the challenges laid down by the Latham 2 and Egan 3 reports, wider use of hybrid structures would significantly improve the productivity and therefore competitiveness of the whole UK concrete frame industry.
Based upon work carried out under a PII research project, this publication demonstrates how to achieve best practice.T he guidance explains the benefits that result from: early involvement of specialist contractors using a lead frame contractor ■ using best value philosophy ■ holding planned workshops ■ measuring performance ■ trust ■ close co-operation – with an emphasis on partnering. ■ ■
The guidance is supported by case studies and shows that although there are intense periods of co-ordination during the design phase, there are tremendous rewards on site and in use. Best value is achieved through communication and measured in terms of buildability, construction speed, aesthetic, quality, environmental and whole-life cost benefits. HCC can achieve very significant cost savings and give rise to some very satisfied clients.This publication is intended to show how this can be achieved.
Figure 1 Gatwick office project Showing precast floor beams onto in-situ beams and columns. Photo :J Doyle
With this in mind, the Reinforced Concrete Council was successful in gaining government support, through the Department of Trade & Industry Partners in Innovation (PII) scheme, to carry out a research project entitled ‘Best Practice Guidance for Hybrid
