Tensile Structure in Kolkata

Kolkata's tensile-structure demand comes from its industrial belt (the Falta and Taratala SEZs, the Howrah and Kalyani estates, the port), its commercial core (BBD Bagh, Park Street, the Sector V IT hub at Salt Lake), a substantial institutional and school sector, and the courtyard-and-arcade architecture of its older commercial buildings.

Ekra Decor's documented Kolkata work is a tensile membrane roof over the store shed and an adjoining canopy at Vikram Solar's module-manufacturing site near the city, and a single-mast conical shade over the courtyard of an arcaded commercial building. Both were engineered for the region's monsoon and wind.

Kolkata is served from the Delhi NCR base; steel and membrane are fabricated at the workshop and shipped, and the same in-house team installs. For the full technical background, see the tensile structure guide.

The steel is hot-dip galvanised for the humid, salt-tinged air, with stainless fittings where exposed. Full comparison on the membrane materials page.

• Site survey & soil investigation — the soft Gangetic delta soil often needs piled foundations, sized from the site's own investigation to IS 456.
• Wind — two cases matter: the sharp gusts of the Kalbaisakhi Nor'westers and the coastal, cyclone-fringe design wind. Uplift is taken to the appropriate figure under IS 875 Part 3.
• Drainage — steep falls and generously sized gutters and outlets for the heavy monsoon, with a designed overflow route.
• Corrosion protection — hot-dip galvanising and stainless fittings for the humid, salt-tinged air.
• Courtyard structures — a single-mast cone puts one foundation in the court and drains outward, clear of the surrounding arcades — well suited to the city's older commercial buildings.
• Constrained-site logistics — off-site fabrication and a planned crane lift keep the on-site programme short on a congested plot.