Colombo, is a rapidly developing city in Sri Lanka, a new gateway to Southeast Asia. This 69-story Altair building consists of 400 residential units overlooking Lake Beira, the Indian Ocean, and the city of Colombo. Altair Apartments are centrally located at Staple Street, Colombo 02, and is one of the serviced apartments in Colombo. The Altair Tower, Sri Lanka's tallest residential building, offers a revolutionary two-leg structural design with outdoor garden terraces at every level. The Altair consists of two vertical blocks of stepping towers, one reclining on the other. The leaning shape allows an outdoor terrace facing Beira Lake to be built on each floor level. Both the leaning tower and its associated vertical tower are designed with through-unit designs allowing all units to have open plans and natural cross-ventilation. An arcade of retail outlets in the Altair building at ground level allows a pedestrian promenade along the waterfront. A mezzanine-level restaurant overlooks the promenade and the lake. A comprehensive study of structural systems and their effects on unit forms contributed to the unique diagrid system of choice. The units evoke a new sense of connection with the area, the lake, and the Indian Ocean with the column-free interiors. The diagrid structure is highly rationalized, allowing for units that are naturally ventilated and beautifully lit. Altair Sri Lanka is a real estate designer and architect by one of the renowned architecture Moshe Safdie. However, in order to develop this product development, other structural engineers with high-performance skills and effort were required.  Altair apartments offer 404 exclusive apartments ranging from 1,468 square feet 2-bedroom units to Presidential Palatial Suites and Sky Villas up to 5,273 square feet. Altair Constructions range from 1.5 million per slot of the unit.  Altair Tower offers a wide range of special integrations such as a swimming pool, sky garden, recreation facilities, shopping, and dining.