Delhi Metro chief E Sreedharan said, "We have received the report on the snapping of cranes in Zamrudpur. It holds contractor's mismanagement and non-professional approach as the reasons for the mishap."
The DMRC has appointed B P Singh, an expert on cranes and former general manager of NALCO, to inquire into the July 13 mishap when three cranes toppled during debris clearance at Zamrudpur.
Sreedharan said Gammon India for using four cranes at the same time which was not the practice. He also said, "Two cranes should have been used instead of four. Once you use four and if one of them develops a snag, then everything goes wrong."
"The report also said that the clearance of girder from the site should have been done in two stages. There is a sheer error in judgement. Fortunately, only four cranes were lost but it is a very major incident," he added.