Altair (building)

Altair
The two towers under construction in March 2017
Location in central Colombo
General information
Status Under construction
Type Residential
Retail
Location Colombo, Sri Lanka
Address 121A Sir James Pieris Mawatha, Colombo 00200
Town or city Colombo
Country Sri Lanka
Coordinates 06°55′08″N 79°51′16″E / 6.91889°N 79.85444°E / 6.91889; 79.85444Coordinates: 06°55′08″N 79°51′16″E / 6.91889°N 79.85444°E / 6.91889; 79.85444
Construction started 2012
Height
Architectural

240.0 m (787 ft),

209.0 m (686 ft)[1]
Technical details
Floor count

68 Vertical tower

63 Leaning tower
Floor area 1,500,000 sq ft (140,000 m2)
Lifts/elevators 9 high speed, 2 service
Design and construction
Architect Moshe Safdie
Developer South City
Main contractor Shapoorji Pallonji Mideast LLC
Website
www.altair.lk
Engineering services
Piling Works San Piling
Water Proofing Finco Engineering
References
Skyscraper Database [2]

Altair is a residential and commercial development under construction in Colombo, Sri Lanka. The building is an architectural masterpiece with a 68 floor vertical tower and 63 floor leaning tower.[3] At 240m, the building will be one of the tallest buildings in Colombo when it is completed. The building is situated on the banks of the Beira Lake on a 2-acre plot of land.

Location

The towers under construction (far left) in November 2017.

The building is located in the heart of Colombo, in an area the Urban Development Authority plans to convert into a pedestrian-only promenade to facilitate the 40,000 sq ft (3,700 m2) high-street retail component being constructed at street level. To reduce congestion, traffic will be diverted via a new access road; according to traffic analyses conducted, travel time will increase by 14 seconds. Due to its location, the building will enjoy 270 degree unobstructed views of Beira Lake and the Indian Ocean.

Features

Altair will consist of 400+ luxury apartments (3 Bedroom, 4 Bedroom and Penthouses) ranging from 1,500 square feet (140 m2) to over 4,000 square feet (370 m2). Additionally, the development will also have a Sky Garden on the 63rd floor with a pool, lounge and party arena.

Design and Construction

The building has been designed by Moshe Safdie of Safdie Design who was also the architect for the Marina Bay Sands in Singapore.

Altair comprises two structures, one a 240-meter vertical tower and a 209-meter leaning tower. The leaning tower is inclined from level 5 to level 39 and goes vertical up to roof level at a height of 209 meters.[1] The leaning or stepping tower has an angle of 13.8 degrees from the vertical and leans towards the vertical tower. The two towers are connected by steel outriggers at four points at levels 39 and 41.[1] Each tower is supported by external walls and internal core walls forming a three dimensional structured frame.

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. 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.

Completion of the structural work was marked by “topping out” in December 2017.[4] Interior work is currently underway and Altair is schedule to be completed in 2018.[4]

References

  1. 1 2 3 "Altair's structural engineer explains high-rise design principles at Colombo forum". Pressreader.com. 18 July 2017. Retrieved 28 August 2018.
  2. ↑ "Altair". CTBUH Skyscraper Database.
  3. ↑ "Altair Sri Lanka". altair.lk. Retrieved 28 August 2018.
  4. 1 2 "Altair celebrates 'topping out' – interior work in full swing". sundaytimes.lk. 17 December 2017. Retrieved 28 August 2018.
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