Loose or corroded joints have been identified as the likely culprit of the collapse of a mezzanine floor at Jarkarta?s Indonesia Stock Exchange on Monday that resulted in injuries to more than 70 people.

via <a href='http://https://twitter.com/cnni/status/952909523118903296'>CNN International</a>. ImageThe mezzanine after its collapse

Loose or corroded joints have been identified as the likely culprit of the collapse of a mezzanine floor at Jarkarta?s Indonesia Stock Exchange on Monday that resulted in injuries to more than 70 people.According to the Australian Broadcasting Company, a preliminary report released by the Indonesian Ministry of Public Works based on interviews with building management and analysis of CCTV footage found that the structure had possibly failed as a result of weak shear joints from ?loose or corroded bolts.?This scenario could have caused the mezzanine to be vulnerable to high weight concentrations, such as occurred Monday when nearly 100 visiting university students were gathered on the platform.
© Flickr user <a href='http://https://www.flickr.com/photos/33542052@N07/5893413686'>Seika</a>. Licensed under CC BY 2.0. ImageThe Indonesia Stock Exchange, completed in 1995

"We would like to convey that this report is a preliminary report of the results of a review by ministry staff, that is unofficial," said the public works ministry's press department in a statement. "...