Helix Towers


The Helix occupies a site on the Isle od Dogs, and consists of two elliptical residential towers, respectively 28 and 34-storeys high. The two towers are linked by a podium structure extending up to level 4. The podium levels host residential amenities such as gym, pool, dining room and lounges, and plant rooms.

The two towers are connected between levels 16 and 24 by an architectural feature called the “spaghetti”, consisting of double-curved steel units cantilevering from each tower. Part of the core of the tallest tower is transferred at podium level to create a clear floorplan for a restaurant. A single level basement sits beneath the building foot print and accommodates 20 car parking spaces, bike storage areas and MEP plant rooms. The basement positioned close to a major Thames Water asset and an HV cable.

Key Technical Innovation

  • Design of spaghetti structure, including second-order non-linear analysis
  • Transfer of the core of the tallest tower to create enough space for the ground floor restaurant

Key Technical Challenges

  • The transfer of the tallest tower core wall at podium level to create space for ground floor restaurant
  • Wind response of two towers positioned close one to each other
  • Design of spaghetti structure, including second-order non-linear analysis
  • Introduction of a swimming pool within the lower tower podium
  • Asset protection of a 1500 mm concrete trunk sewer and of a 130kV cable in close proximity to the asset

Project Value:
£120 million
Year Completed:
Building Metrics:
34 storey and 28 storey towers
podium linking the two structures up to level 4

Essential Living
Darling Associates
Robert Bird Group Services:
Structural Engineering
Civil Engineering

Additional Information

Additional information is available for you to view regarding services and sectors RBG provide.


Robert Bird Group provide outstanding innovative and buildable structural design solutions in all sectors across the globe.


Robert Bird Group’s Civil Engineers provide engineering design services from concept and planning through detailed design on to construction and maintenance, with the potential for ongoing management and advice for the operating life of a project.

Residential + Retirement

Residential developments define the modern city – where and how we live drives urban spread, social cohesion, and plays a huge part in quality of life, for all of us.

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