Putting the blame on "deficiency" in design and material for the July 12 mishap which claimed six lives, Delhi Metro today claimed that a design consultant firm which inspected the site "misled" them and the contractor about the condition of the pier which collapsed.
The DMRC is also serving a show-cause notice to contractor Gammon India, which was carrying out the work at Zamrudpur accident site, to explain why it should not be blacklisted for two years, besides suspending its two Deputy Chief Engineers.
It also blacklisted Arch Consultant, design consultant of Gammon India, for five years besides issuing a "major penalty chargesheet" to Chief Engineer (Design) Rajan Kataria.
Making the findings of a probe into the Zamrudpur accident public, Delhi Metro chief E Sreedharan said Tandon Constructions were appointed by them to inspect the site after cracks were reported.
"The crack on the pier 67 was first noticed on April one and we approached them on April three. They gave us a report on April 15 saying that there was no inadequacy in the design. The consultant misled the DMRC and contractor," Sreedharan told a press conference.
The Board of Directors of DMRC which met New Delhi on Monday to study the report of the three-member panel headed by IIT professor A K Nagpal decided to blacklist Tandon Construction for two years.