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Corrosion Causes Indonesia Stock Exchange Fall

Monday, January 22, 2018

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Reports indicate that loose or corroded joints may be to blame for the recent collapse of the mezzanine floor of the Indonesia Stock Exchange, located in Jakarta. The incident left several people injured and has raised questions regarding the building’s safety.

More than 70 people were injured on Monday (Jan. 15) at the time of the incident.

Floor Collapse

According to a preliminary report by the public works ministry, which included an analysis of CCTV footage, 100 university students from Palembang in Sumatra were visiting the Stock Exchange for a study tour. When many of them gathered on a nearby suspended walkway, the concentration of weight caused several cables to break away from the ceiling. The walkway fell out from underneath the students; some were reportedly trapped under slabs of concrete and other debris.

Betride Septiani, one of the students, reported thinking that they thought the collapse was an earthquake, and that they didn’t feel the walkway swaying.

In all, 77 people were injured.

The report concluded that the collapse may have been caused by loose or corroded bolts, or shearing joints. The walkway itself was also part of the original structure.

The preliminary report was also based on interviews with building management, the ministry noted, but the team did not have direct access to the site at the time. 

Stock Exchange Building

Located in Jakarta’s financial district, the high-rise is part of a two-tower complex that houses several offices and the Indonesia branch of the World Bank. The complex is owned and developed by PT Danayasa Arthatama Tbk, which is part of Artha Graha group.

Since Jan. 15, police have ruled out the possibility of a bomb being the cause of the collapse. The second tower was reopened for business the following day.

Davy Sukamta, head of the Indonesian Society of Civil and Structural Engineers, noted that the cause of the collapse could be attributed to degradation of materials over time and earthquakes, but in order to prevent that “we would have to develop more foolproof materials and connections.

"If a building has a special construction like this, it must be inspected more regularly for wear and tear."

Future Analysis

According to The Jakarta Post, The Indonesian Engineer Union (PII) will analyze the Indonesia Stock Exchange building.

“It will cover several aspects, such as building design, construction and utilization,” PII deputy head Heru Dewanto.

Dewanto did not divulge when the results of the investigation would be made public, but did note that the results could be used to improve building construction.

   

Tagged categories: Accidents; Asia Pacific; Building design; Condominiums/High-Rise Residential; Good Technical Practice; Health and safety; Inspection

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