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1 Title:Case Study: The Leadenhall Building, LondonAuthors:Andy Young, Project Architect, Rogers Stirk Harbour + PartnersNigel Annereau, Director, ArupAndy Butler, Director, Laing O`RourkeBrian Smith, Director, Davis LangdonSubjects:Architectural/DesignBuil ding Case StudyStructural EngineeringKeywords:BIMMega FramePrefabricationPublication Date:2013 Original Publication:CTBUH Journal, 2013 Issue IIPaper Type:1. Book chapter/Part chapter2. Journal paper3. Conference proceeding4. Unpublished conference paper5. Magazine article6. Unpublished Council on Tall Buildings and Urban Habitat / Andy Young; Nigel Annereau; Andy Butler; Brian buildings: design, construction, and operation | 2013 Issue IIEurope Special Issue: 2013 London ConferenceCase Study: The Leadenhall Building, LondonBuilding Tall in a 2,000-Year-Old City Offi ce vs.

2 Residential: Tower EconomicsEngineering Tall in Historic Cities: The ShardLimiting Tall Buildings to City Outskirts?Talking Tall with Irvine Sellar and Kent GardnerTall Buildings in Numbers: EuropeCTBUH JournalInternational Journal on Tall Buildings and Urban HabitatSpecial Issue Sponsored by:12 | The Leadenhall Building, LondonCTBUH Journal | 2013 Issue II12 | The Leadenhall Building, LondonCTBUH Journal | 2012 Issue IIITall, Light, and HandsomeCase Study: The Leadenhall Building, LondonThe Leadenhall Building leans back to make way for views to St. Paul s Cathedral and other historic sites in a crowded section of the City of London, but it also springs forward with an innovative structure and a dynamic street presence. Stopped once during the economic downturn, the tower is rising again under a new joint venture.

3 Scheduled for completion in 2014, the 224-meter-high building was more than 50% leased before topping out. Members of the design, engineering, and construction team here detail the thinking process that led to the building s unique tapering shape the components of which were largely built off-site that is making the Cheese-grater stand out from the crowd as both an icon and a lucrative investment |||ndodndodododododdodoooooooooooooooooo oooooooooooooooooooooooooooooooooooooooo nnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnn nnnnnnnnnnnnnnnnnnnnnnnnnnCTCCTCCCCCCCCC TCTCTCTCTCTCTCTCTBCTBCTBCTBCTBCTBCTBCCCC CCCCCCCCCCTCCCTCCCTCCCCCCCCCCCCTTCCCCCTC CCTCCCCCCTCCCCTCTCTCCCTCCCCCCTCCCCCTCCTC CCCCCCTCCTCCCCCTCCCTTCCCCCCCTCCCCTTTCCTC CCCCCCTTCCCCCCCCCCCCCCTCCCCTCCCCCTCCCCCC CCCCCCCCCCCCCCCCCC|||1111111122222111222 2221222222222211111222222222211212222222 2222221212122122122222212121212222112122 11212212112121112112221111212221212||||| |||||||||||||||||||||||||||

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8 In addition to its distinctive tapering shape, it is remarkable in many ways. It is built to the edges of its 48 x 62 meter plot and incorporates signifi cant new public space at the ground level galleria. From a structural perspective, the building is unusual for a building of its height. There is no central core; instead, the building makes use of a tube structural perimeter envelope, with an external support core, that allows for open fl oor plates (see Figure 1). In addition, 85% of the building s construction value will consist of prefabricated and off -site construction Young, Project Architect Rogers Stirk Harbour + PartnersThames Wharf, Rainville RoadLondon W6 9HA, United Kingdomt: +44 20 7385 1235, f: +44 20 7385 Annereau, Director Arup London13 Fitzroy Street, London W1T 4BQ, United Kingdomt: +44 20 7636 Butler, Director Laing O RourkeBridge Place 1 & 2, Anchor BoulevardCrossways Dartford Kent DA2 6SN, United Kingdomt: +44 1322 296200, f: +44 1322 296262 Smith, Director Davis Langdon, an AECOM companyMidCity Place, 71 High HolbornLondon WC1V 6QS, United Kingdomt: +44 20 7061 7000, f: +44 870 048 Young joined Rogers Stirk Harbour + Partners (then Richard Rogers Partnership) in 1996 and was made an Associate Partner in 2011.

9 He has led the Leadenhall team as Project Architect since 2005 and previously worked on a number of high profi le projects, including 88 Wood Street and the Lloyd s Register of Shipping, both Stirling Prize-nominated. Andy has also been involved in expanding the practice s work into the Middle East, working on projects in Beirut, Annereau has worked for Arup for 26 years and is a director within one of the London building teams. He has been working on Leadenhall since 2005, initially looking at the demolition of the original structure, then leading the basement design phase, and subsequently providing day-to-day leadership of the structural project team. Andy Butler has worked for more than 30 years in the UK construction and property industry, and has a diverse, proven capability that ranges from managing commercial development at every stage, including delivering large-scale prestigious developments from funding through occupation.

10 In addition to his commercial development roles, Andy plays a key role in the technical development of innovation within our organization and in the wider construction industry environment. He is a leading mentor for graduate, postgraduate, and executive development programs within the Laing O Rourke Smith is a director within the London Commercial team at Davis Langdon, an AECOM company, and has led the cost consultant team on Leadenhall since 2006. In more than 17 years of leading and delivering a variety of projects within central London and abroad, including work on tall buildings around the world, Brian understands the key drivers for delivering large-scale developments. He is also member of the company s tall buildings group, leading collaboration with other regions around the the site of the City s ancient Roman center, this distinctive building sits across the road from the Lloyd s Building.