The pedestrian bridge near Jawaharlal Nehru Stadium that collapsed on Tuesday was designed by engineers blacklisted for two years by Delhi Metro for providing “misleading” information.
The firm that built the bridge was hired on April 1, 2009 by Delhi Metro Rail Corporation (DMRC) to assess the structural safety of pillars, including pier no. 67, where cracks were already visible, in Zamrudpur.
They advised DMRC the cracks “could not be attributed to inadequacy of design and detailing”. But the same pier collapsed in July 2009, killing six people. The DMRC debarred Tandon Consultants for two years.
On Tuesday, 27 labourers were injured when the pin attached to one of the suspenders that connected the bridge’s deck with the arch, snapped.
The structural safety of the design prepared by the same company has, therefore, come under scanner now.
“The inquiry committee is looking at all possibilities, be it the design of the pedestrian bridge or the execution of the work or faults in supervision by our engineer or by the contractor,” said Delhi public works department secretary K.K. Sharma.
Mahesh Tandon, managing director, Tandon Consultants, however, said it was too early to say the pedestrian bridge collapsed due to failure of the structure’s design.
“The enquiry committee constituted by Delhi government has started its investigations and my team is cooperating with it. Since I was not in town for the past three days, I am yet to take feedback from my team," he said.
Tandon Consultants has designed structures of several flyovers and viaducts, underground structures and metro stations for the Delhi Metro.