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Cantilever architecture: Clearpoint Residencies Tower, Sri Lanka

The 46 level high Clearpoint Tower will be the tallest vertical garden in Asia. The building is being constructed in the Colombo district of Rajagiriya. The use of post-tensioning systems made it possible to build cantilever swimming pools and balconies.

The tower includes 5 m cantilever balconies surrounding the entire building that required a high load-bearing capacity in order to accommodate the loads of the planned plantings. The tower also features 10 swimming pools extending in 5.1 m cantilevers.

The current construction boom in Sri Lanka has led to wide spread usage of post-tensioning systems in high rise buildings because these systems make it possible to build extraordinary and seismically resistant designs with long cantilever spans.

74 t of strand post-tensioning tendons were installed

Utracon supplied and installed 74 t of strand post-tensioning tendons in the cantilever beams, flat slabs and walls. The stressed beams enabled the construction of flat girders so each level has the same floor to floor clear height.

In the cantilever swimming pool slabs, Utracon installed and stressed 30 strand tendons with FA flat anchorages. In the cantilever balconies, a total of 328 strand tendons including FA flat anchorages and 716 strand tendons including MA multiplane anchorages were installed and stressed.

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Sri Jayewardenepura Kotte, Sri Lanka (2017)

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