Collapse of the Royal Plaza Hotel

Collapse of the Royal Plaza Hotel
Date	13 August 1993
Location	Mueang District, Nakhon Ratchasima Province, Thailand
Coordinates	14°58′26″N102°05′37″E / 14.9739°N 102.0935°E
Cause	Collapse after structural deformation due to creep
Deaths	137
Non-fatal injuries	227

Last updated February 02, 2025

The collapse of the Royal Plaza Hotel occurred on 13 August 1993 in the city of Nakhon Ratchasima (Korat) in Thailand, killing 137 people and injuring 227. Taking just less than 10 seconds, the building collapsed and transformed the 6-storey complex into a pile of rubble, leaving only the front elevator hall which was separately built from the rest of the structure.^[1] Gradual deformation due to creep weakened all the ground floor support columns and when one failed the rest rapidly followed, resulting in an almost complete vertical collapse.^[1] Several people were rescued from the rubble and trapped victims called for help using mobile phones.^[2] Violation of safety regulations and an unprofessional approach on the part of the engineer were deemed to be the cause of the disaster. Police arrested the owner of the building and five others.^[3] Rescue operations continued for more than 20 days, until 3 September. It is one of the most fatal and disastrous man-made accidents in Thai history.

Background

The Royal Plaza Hotel, in Nakhon Ratchasima Province, Thailand, was hosting two conference meetings at the moment when the collapse occurred.^[1] At the time of the collapse, there were 379 people in the building. Of these, 117 were government officials from the Education Ministry, who were attending a seminar in Benchamas Room (เบญจมาศ; RTGS: Benchamat) on the second floor, 59 were from the Shell Company on the fourth floor in Pikul-Chuanchom (พิกุล-ชวนชม; RTGS: Pikun-Chuanchom) Room, and 78 were general hotel clients. The rest of the 125 victims were hotel staff.^[1]

Cause

The main reason for the collapse was the addition of floors without properly considering the strength of the structure and soil stability. The original permit, issued in 1983, was for a three-storey building with one underground floor and later during 1985 local authorities approved conversion of the building to a hotel but construction permission was not officially sought for the three additional floors until 1990. There were many errors including not strengthening foundations and columns, and not assessing the strength of the existing columns which later culminated in one of the worst building tragedies of Thailand.^[1]

Aftermath

Investigation

On 15 August 1993, two days after the incident, the Civil Engineering Chapter of the Engineering Institute of Thailand (EIT) immediately established a technical investigation group to support the Task Force at the site.^[1] The investigation mainly focused on solving two conundrums:

Why did the building last for three years after the additional floors were added? The conclusion agreed by all of the investigating department about the cause of the collapse was unsatisfactory structure after the additional floors; however, instead of collapsing instantly, the building lasted firmly for 3 years.^[1]
The factors that triggered the collapse of the building, since none of the typical factors causing building collapses (e.g. earthquake, building misuse) were apparent.^[1]

Criminal charges were filed against fifteen people, including the hotel owner and management, engineers and municipal officials.^[4] Only engineer Bampen Panratissara was found guilty by the Supreme Court, and sentenced in 2003 to 37 years in prison.^[5]

Compensation

In 2009, the Nakhon Ratchasima Court of Appeals charged five defendants for 152.23 million baht as compensation to the companies and the victims' families who suffered from this disaster.^[1]^[5] These five defendants include Nakhon Ratchasima Municipality, Wongsinthai Limited Partnership, the Royal Plaza hotel owner Amorn Janrattanaprada, engineer Sathorn Promnin, and design-and-construction supervising engineer Bampen Panratissara.^[5]

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References

1 2 3 4 5 6 7 8 9 Kanok-Nukulchai, Worsak, ed. (30 September 1994). Investigation Report on Collapse of Royal Plaza Hotel: Executive Summary (Technical report). Engineering Institute of Thailand. pp. XVII–XXII. Available at thaiengineering.com Archived 2015-02-15 at the Wayback Machine .
↑ Shenon, Philip (15 August 1993). "Death Toll Rises to 88 in Thailand Hotel Collapse". The New York Times. Retrieved 3 October 2012.
↑ "Rescuers Keep Searching". Orlando Sentinel. 16 August 1993. Retrieved 4 October 2012.
↑ "17 ปี ย้อนรอยโศกนาฏกรรม ร.ร.รอยัลพลาซ่า โคราช". Thai Rath Online (in Thai). 14 August 2010. Retrieved 20 November 2013.
1 2 3 "Court orders five to pay Bt152 million compensation for Korat Hotel collapse". The Nation. 7 March 2009. Archived from the original on 30 March 2013. Retrieved 13 October 2013.

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[report-1] 1 2 3 4 5 6 7 8 9 Kanok-Nukulchai, Worsak, ed. (30 September 1994). Investigation Report on Collapse of Royal Plaza Hotel: Executive Summary (Technical report). Engineering Institute of Thailand. pp. XVII–XXII. Available at thaiengineering.com Archived 2015-02-15 at the Wayback Machine .

[ny-2] Shenon, Philip (15 August 1993). "Death Toll Rises to 88 in Thailand Hotel Collapse". The New York Times. Retrieved 3 October 2012.

[3] "Rescuers Keep Searching". Orlando Sentinel. 16 August 1993. Retrieved 4 October 2012.

[thairath-4] "17 ปี ย้อนรอยโศกนาฏกรรม ร.ร.รอยัลพลาซ่า โคราช". Thai Rath Online (in Thai). 14 August 2010. Retrieved 20 November 2013.

[nation-5] 1 2 3 "Court orders five to pay Bt152 million compensation for Korat Hotel collapse". The Nation. 7 March 2009. Archived from the original on 30 March 2013. Retrieved 13 October 2013.

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