Altair (Colombo) Altair is an ongoing residential and commercial development project in Colombo City, Sri Lanka (Agrawal ae al, 2016). Constructed on a two-acre land at Sir James Peiris Mawatha on the east bank of Beira Lake, it comprises 2 tower blocks; a 63-storied leaning tower and a 68-storied vertical tower. Of them, the vertical tower is 241.2 m (791.33 ft.) in height and it is considered one of the tallest residential buildings in Colombo (Kajeenthan & Ranaweera, 2019; Kanaharaarachchi, 2017). Design & Construction Altair was designed by renowned Architect Moshe Safdie based in Boston, USA and developed by Indocean Developers (Pvt) Ltd, India (Agrawal ae al, 2016; Kanaharaarachchi, 2017). It consists of two tower blocks, one vertical tower and one stepped tower which slopes to the vertical tower. The inclination angle of the leaning tower is 13.75° (Kajeenthan & Ranaweera, 2019). It is inclined from level 5 to level 39 and goes vertically up to the roof level at a height of 209.1 m. T…
