--- title: Case Study - Emirates Spinnaker Tower description: Construction of the Spinnaker Tower legs that is regarded as one of the most difficult slipform operations carried out in the UK to date. image: https://www.icc-commonwealth.com/hubfs/images/imgs/spinnaker-tower_support-legs.jpg --- [![icc-commonwealth_logo_d](https://www.icc-commonwealth.com/hs-fs/hubfs/logos/icc-commonwealth_logo_d.png?width=655&name=icc-commonwealth_logo_d.png "icc-commonwealth_logo_d")](https://www.comdynam.com?hsLang=en-us) [Ë](https://www.icc-commonwealth.com/case-study/emirates-spinnaker-tower#mobile) # Tall Structures ### QUESTIONS? Contact one of our Industry divisions for assistance   [![Contact  >](https://no-cache.hubspot.com/cta/default/160860/d7ebeaf5-189b-44eb-abe0-579db1af2ea7.png)](https://cta-redirect.hubspot.com/cta/redirect/160860/d7ebeaf5-189b-44eb-abe0-579db1af2ea7) ## Case Study - Emirates Spinnaker Tower **Portsmouth Harbor  **| *** Portsmouth, England - UK*** Slipform Construction of Concrete Tower Support Legs The two main concrete support legs for this dramatic 160 meter tall observation tower overlooking Portsmouth Harbor are hexagonal in section.  The cross sections of the legs taper as they get higher and then join into one tower section for the top 50 meters of the structure. The cross sections of the legs are hollow, with one housing the internal passenger lift and the other a full height internal staircase.  The construction of the Spinnaker Tower legs is widely regarded as one of the most difficult slipform operations carried out in the UK to date. ![spinnaker-tower_support-legs.jpg](https://www.icc-commonwealth.com/hs-fs/hubfs/images/imgs/spinnaker-tower_support-legs.jpg?width=387&name=spinnaker-tower_support-legs.jpg "spinnaker-tower_support-legs.jpg") ![Spinnaker Tower Support Leg Construction](https://www.icc-commonwealth.com/hs-fs/hubfs/images/imgs/concrete-support-legs_spinnaker-tower03.jpg?width=217&name=concrete-support-legs_spinnaker-tower03.jpg "Spinnaker Tower Support Leg Construction") ![Concrete Support Legs Spinnaker Tower](https://www.icc-commonwealth.com/hs-fs/hubfs/images/imgs/concrete-support-legs_spinnaker-tower02.jpg?width=238&name=concrete-support-legs_spinnaker-tower02.jpg "Concrete Support Legs Spinnaker Tower") [![gda-usa logo_wht](https://www.icc-commonwealth.com/hs-fs/hubfs/gda-usa%20logo_wht.png?width=293&height=187&name=gda-usa%20logo_wht.png "gda-usa logo_wht")](http://www.dominion-global.com/en) #### ICC Commonwealth a division of Global Dominion Access, USA 795 Wurlitzer Drive N Tonawanda, New York 14120-3039 716.634.3967 ### Subscribe to Our Blog