The Altair tower in Colombo, Sri Lanka

The Altair tower in Colombo, Sri Lanka
The Altair tower in Colombo, Sri Lanka

Інвестиційні дані

Ім'я: The Altair tower in Colombo, Sri Lanka
Місцезнаходження: Colombo, Sri Lanka
Інвестор: South City
Тип: Residential and Comercial Real Estate
Завершення: 2017
Виконавець / Проектант: Shapoorji Pallonji Mideast LLC


The Altair tower in Colombo, Sri Lanka, is an ambitious project. With a final height of 240 metres, when fully constructed, the building will consist of a main 68-floor tower alongside a sloping, 64-floor tower. Even now, it is one of the tallest towers in Colombo’s skyline. The Altair tower contain both private apartments and commercial spaces.

The project is estimated to cost around 36,345,000,000 Sri Lankan Rupee (over 230,000,000 US Dollars) and includes R-XPT-16125/5 bolts in its construction. Specifically, Rawlplug’s through-bolts were used to fix and secure separator beams in the elevator shaft. Rawlplug DCA wedge anchors, threaded rods and screws used in various applications.

Moshe Safdie is the architect behind the project and has been involved in various iconic constructions around the world. Altair tower is being developed by Indocean Developers (PVT) Limited and contracted by Shapoorji Pallonko Co. & Ltd. OTIS-Elevators (Pvt) Ltd are also acting as a sub-contractor.

The building has been designed by Moshe Safdie of Safdie Design who was also the architect for the Marina Bay Sands in Singapore. There are two towers, one of which is leaning on the other. The leaning tower has been designed using a distinctive diagrid structure with flat slabs which not only adds structural stability to the building without the need for internal columns but also allows for a permeable surface with large windows. This allows maximum airflow and light which contributes to energy savings in heating and cooling and also provides access to the balcony for an awesome view.

The towers will be constructed on reinforced concrete piles and a raft footing with a reinforced concrete and/or steel superstructure. Even though Colombo rarely experiences significant earthquakes (it is classified in seismic Zone 0 under the international building code), Altair has been designed to withstand earthquakes up to 7 on the Richter Scale.

The developers have also commissioned wind tunnel tests to be conducted by RWDI. This is the same team that conducted the tests for the Burj Khalifa. 103 individual wind speed sensors were placed on a 2m model of Altair. They also modeled all relevant surrounding buildings and topography within a 480m radius.