JAKARTA (Reuters) – Loose or corroded joints may have caused the sudden collapse of a mezzanine floor at the Indonesian Stock Exchange building this week that sent visiting students plunging to the ground, a preliminary report by the public works ministry has found.
More than 70 people were injured in Monday’s incident, which was captured on dramatic CCTV footage that showed a walkway giving way under the students, some of whom were trapped beneath slabs of concrete and other debris.
The ministry’s report said the suspended walkway fell because several cables broke away from the ceiling due to a “concentration of weight” in one spot where nearly 100 university students visiting the exchange had gathered.
“The burden could not be borne by the … structure and triggered a building failure,” said the report.
The initial conclusion was that the collapse may have been caused by “loose or corroded bolts” or “shearing joints”.
The report said the walkway was part of the original structure, built in the late 1990s, and not added later. The public works ministry said its report was based on interviews with building management, visual observations and analysis of
CCTV footage on social media, but added that its team did not have direct access to the site.
“Further and closer observation is required on-site, and of construction documents,” it said.
The public works ministry’s press department said in a statement: “We would like to convey that this report is a preliminary report of the results of a review by ministry staff, that is unofficial.”
The high-rise building is part of a two-tower complex owned and developed by PT Danayasa Arthatama Tbk. It houses dozens of offices, including the World Bank’s Indonesia branch.