Chhatrapati Shivaji International Airport – Terminal 2 – Structural Engineering

The new Integrated Terminal Building at Mumbai’s Chhatrapati Shivaji International Airport combines international and domestic operations at one of India's busiest airports. Designed to accommodate up to 40 million passengers per year, the 410,000-square-meter facility features a number of structural innovations.

A key feature is a long-span roof covering 70,000 square meters, making it one of the world's largest roofs without an expansion joint. The roof is supported by 30 massive columns spaced at 64 meters in the north–south direction and at 34 meters in the east–west direction. SOM increased the depth of the trusses near the columns, and ran trusses in both an orthogonal grid and a 45-degree grid, resulting in generous spacing and cantilevers of 40 meters along the perimeter. The mega-columns were also designed to serve as hoist mechanisms so the entire roof could be constructed without tower cranes — a measure taken in response to site constraints and the close proximity of an existing terminal.

In addition to its superlative roof, the terminal features the largest and longest cable wall system in the world. Furthermore, the structural design prioritizes modular construction in order to optimize costs and to facilitate an accelerated construction schedule.