Air Traffic Control Tower, Chhatrapati Shivaji International Airport

  • The unique sloping skirts are architectural features but also reduce wind-induced oscillations
  • The design meets tight vibration limits without the need for added structural dampers
  • Winner of a Autodesk Hong Kong BIM Award 2009

The Air Traffic Control (ATC) Tower is an iconic structure and landmark addition to Mumbai’s skyline. It is the tallest structure in the area, with a roof at 84m above ground. The tower combines aesthetic designs with stringent traffic control requirements.

Arup provided structural, geotechnical, civil, mechanical, electricalpublic health and acoustic engineering services for the ATC tower. As part of a separate contract, Arup also provided façade design services. The main challenges for Arup were to shoehorn the 84m tall tower with all associated services including a technical block and a mechanical plant building (a total of 3,641 m2) onto the 2,884m2 site, then marrying them with a competition winning design concept and satisfying the functional demands of air traffic control.

The sloping skirts are present primarily as an architectural feature, but also break up the air flow around the tower, reducing the wind-induced vibrations. As a result, control of vibrations was achieved without the use of dampers.

Building Information Modelling (BIM)

Structural modelling and documentation was carried out in Autodesk Revit Structure, which is BIM-focussed software. Model data was transferred over to structural analysis software (Oasys GSA and CSi ETABS, which both have links to Revit) for design. Revit models were exchanged with the architect HOK and were used to produce the drawing deliverables, which is critical for the design of such a complex structure.

The tower design was one of the five winners of the Autodesk Hong Kong BIM Awards 2009, an industry-recognised award held by Autodesk Hong Kong.