Trial Assembly for Chennai Metro’s Open Web Girder Completed

Steel Infra Solution in Bhilai, Chhattisgarh on Wednesday completed trial assembly on a 40 meter long open web girder (OWG) bridge for Chennai Metro’s 26.09 km Line-4 which will connect Light House – Poonamallee Bypass through 30 stations.

This steel bridge weighing 222MT will be launched by Hindustan Construction Company – KEC International JV (HCC – KEC JV) on 118.9 km Chennai Metro Phase 2‘s 7.945 km Package C4-ECV-02 connecting Porur – Poonamallee Bypass.

Details are a little sketchy, but the exact launch location will likely be over Chennai Bypass (NH-32)’s flyovers at Mount Poonamallee Road (view on Google Maps). Also looking at its width, it appears can support only one pair of tracks, so it’ll likely have a twin.

Update: Location is correct. An industry source has confirmed it’ll be launched above Chennai Bypass’ flyovers between Piers P277 to P278.

Photo by Sourav Mukherjee

Chennai Metro Rail Ltd. (CMRL) had awarded Package C4-ECV-02’s Rs 1,147 crore contract to HCC – KEC JV in May 2021 with a 36 month deadline.

Besides constructing the viaduct from chainage 17982.240 to chainage 25928.186 and Poonamallee depot-line, HCC – KEC will build 9 stations at Chennai bypass crossing, Ramachandra Hospital, Iyyapanthangal Bus Depot, Katupakkam, Kumanan Chavadi, Karayan Chavadi, Mullai Thottam, Poonamallee Bus Terminus, Poonamallee Bypass.

Their package also includes launching 11 special steel spans, the exact locations of which I’m unaware of.

Route of Line-4 between Porur and Poonamallee Bypass with the indicative location of stations en-route – view Chennai Metro Phase 2 info & route map
Photo by Sourav Mukherjee
HCC-KEC, CMRL and Steel Infra’s teamsPhoto by Sourav Mukherjee

The OWG will now be dismantled, transported roughly 1200 km south to the site and reassembled for launch. When that is done, it’ll become the city’s second such metro bridge after the 105m long steel truss bridge at Guindy launched by Larsen & Toubro in 2015.

Back in April 2022, HCC – KEC JV had launched the entire Phase 2 project’s first U-girder near Ramchandra Hospital Station’s site. In December, they had completed 50% of pier cap erection.

Here’s a cool recent shot of the viaduct, shared by HCC, right in front of Ramchandra Hospital:

Photo by Hindustan Construction Company

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Global traveler who prefers mass rapid transit

7 Responses to "Trial Assembly for Chennai Metro’s Open Web Girder Completed"

  1. Rajanna says:

    Superb work.Tks for msg of TMRG

  2. Kamal says:

    I have raised a question regarding chennai metro phase2 madhavaram to sipcot via royapettah , when will the tunnel boring machine implemented in this area , is that tunnel boring will be done in royapettah or some other place pls update as the marking on road has happend long before

  3. Gokulanathan Mani says:

    The split OWG is likely because of the gap between the two lines.


    I too raised question regarding Airport – Kilambakkam Phase 1 Extension 👆🏿 What is the status ⁉️

  5. Manoj says:

    Hi, kindly confirm how the construction will be near porur bridge. How 2 lines will cross porur bridge.


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