Giant 120 Tonnes Pier Arms Shaping Hingna Metro Station MahaMetro has begun transporting massive 120-tonne precast pier arms across a 52km stretch to construct the Hingna Metro station on the Reach-3A corridor. Each pier arm, weighing nearly as much as three empty Boeing 737 aircraft, is a critical component for the station’s framework. The project involves installing 20 such arms per station—10 at concourse and platform levels—across seven stations, with a total of 140 pier arms planned for the corridor. The first lifting operation for the Hingna Mount View Metro station commenced late Saturday night and continued into Sunday morning. At the station site, the 120-tonne structures were lifted using an 800-metric-ton crane and positioned on either side of the central pier. These arms are later connected via stitch concrete and post-tensioning methods to form the station’s structural foundation. The precast pier arms are manufactured at MahaMetro’s Khairi casting yard, where each unit undergoes a seven-day casting cycle. This process includes reinforcement work, placement of post-tensioning ducts, casting, and de-shuttering. Once completed, the structures are loaded onto specially designed super-heavy hauler trailers attached to puller vehicles for their 52km journey to the station sites. Transportation of these massive concrete elements primarily occurs via the Outer Ring Road corridor, with vehicles traveling at a maximum speed of 10kmph to ensure safety and reduce road congestion. Most lifting and installation activities are scheduled during nighttime hours to further mitigate traffic disruption. The Reach-3A corridor includes a notable engineering challenge: a 120-metre span over the Vena river in Hingna.#mahaMetro #hingna_metro_station #reach_3a_corridor #vena_river #khairi_casting_yard
