The three-member team from IIT Kharagpur's civil engineering department, led by Prof A P Gupta, inspected the site in the central part of the city for around two hours.
Gupta along with other members of the team, Swapan Majumdar and Sriman Bhattacharya, "climbed on the flyover and inspected several points besides collecting samples from the site," a senior officer of Kolkata Police said.
They would file a report of their findings to Kolkata Police.
The arrested IVRCL officials include the company's Director of Operations Gopal Krishnamurthy, Deputy General Manager of Project Monitoring Cell S K Ratnam, Assistant General Manager Mallikaarjun Rao, Assistant Manager Debjyoti Majumdar and Structure Manager Pradip Kumar Saha.