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									St Mary Axe

  “Overcoming the challenges and limitations of a city centre
          location to create a high quality scheme”



St Mary Axe                               Client
                                          Frogmore
London
                                          Contract Value
                                          £ 10.5 million
                                          Contract Period
                                          October 2007 to March 2009
                                          Contract Type
                                          JCT 2005 Design and Build
Sector
Commercial                                Gross Internal Floor Area
                                          3018 m²
Breeam Rating
Very Good


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                                          Project Summary

                                          A modern seven storey office
                                          block with stone cladding built in
                                          the heart of the city’s
                                          commercial centre.
St Mary Axe


                                        Project Overview

                                        A modern seven storey office block erected using reinforced concrete to basement
                                        and ground floor, with a steel frame above and holorib decking acting as permanent
                                        formwork for the concrete. The windows are bronze anodised aluminium and
                                        flashing and the copings are in traditional lead.

                                        The scheme is constructed to BREEAM ‘Very Good’ utilising sustainable measures
                                        where possible such as “recycled tyres” floor finishes to the main staircase. Water
                                        usage in the building was decreased with the introduction of low flush WC’s and
                                        restricted flow showers and taps.


                                        Challenges & Solutions

                                        The city centre location of this site proved particularly challenging as there was
                                        limited scope for material storage on site and multiple deliveries on sizeable
                                        vehicles was not viable. We therefore had the large Portland stone faced concrete
                                        panels manufactured and delivered to site ‘just in time’ for erection.

                                        We operated strict delivery time procedures with suppliers by allocating time slots
                                        to avoid congestion of vehicles on the highway.

                                        In addition, we hired a nearby office in an existing suite for site management to use
                                        throughout the project. This ensured the building itself was kept free of excess
                                        equipment and improved the quality of the working environment for both the team
                                        and our sub-contractors.

                                        This project included a complex M&E installation including a chilled beam system
                                        combined with natural ventilation, a unique staircase pressurisation system and full
                                        lighting control incorporating daylight dimming, comprehensive commissioning
                                        programmes and workshops were held for all key trades to ensure this element of
                                        the work was successfully completed in the timescales required.


                                        How We Made A Difference

                                        •      The key to creating a scheme of quality required by our client has been the
                                               selection of the best specialist subcontractors who have worked closely with
                                               us from the outset, adding value across the project.

                                        •      We worked closely with the design team to rationalise the basement design
                                               to reuse part of the existing basement slab, thereby negating the need for
                                               piling which would have been both noisy and logistically challenging in the
                                               location. We also reused the existing retaining wall around the site
                                               perimeter and the combined foul and surface water drainage connection.

                                        •      We liaised with our adjacent neighbours at all times keeping them abreast
                                               of progress on site. A regular newsletter was produced.




                                        Client Details                               Architect
                                                                                     Black Architecture




“
                                        Frogmore
       We have enjoyed an excellent     11-15 Wigmore Street                         Project Manager
working relationship with GB            London                                       RLF
Building Solutions. The site team       W1A 2JZ
have really taken the time and effort                                                M&E Services Engineer
to produce a finished product of                                                     Waterman Building Services
outstanding quality




                  ”
                                                                                     Structural Engineer
                                                                                     Waterman Structures
Simon Casey
Senior Project Manager, Frogmore

								
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