Collapse of Hotel New World

Immediately after the collapse, as many as 300 were feared trapped underneath the debris.[10] Estimates dropped to 100 trapped or missing a day later,[11] and then to 60, including 26 hotel staff and 16 bank staff unaccounted for.[9] The figure was finally put at 33 when the official death toll was announced on 22 March 1986 after the end of the rescue effort.[3] Amongst those killed, 23 were Singaporeans, and the other ten foreigners.

After the collapse, many passers-by began to try pulling out survivors. They were soon joined by the Singapore Fire Service (SFS), the Police Task Force of the Singapore Police Force (SPF) and the Singapore Armed Forces (SAF). A nearby business, Eagle Piano Company, became a centre for the rescue operation.

As there were survivors buried in the rubble, the rescue was a delicate operation. Debris was carefully removed as power saws and drills cut through the rubble. Sound detectors were used to locate survivors beneath the slabs by picking up faint moans and cries. In the first 12 hours, nine people were rescued by the SAF. At one time, Lieutenant-Colonel Lim Meng Kin (SAF Chief Medical Officer), along with several other SAF medical officers and two doctors from the Health Ministry, took turns crawling through narrow spaces inside the rubble in an effort to provide assistance to trapped survivors, giving glucose and saline drips to them.

Local tunnelling experts as well as those from Japan, Ireland and the United Kingdom who were involved in nearby construction for the Mass Rapid Transit (MRT), namely Thomas Gallagher, Patrick Gallagher, Michael Prendergast, Michael Scott, and Tan Jin Thong, offered to assist.[12] They became concerned that the use of heavy machinery might collapse the rubble onto those trapped. Their volunteer efforts, digging four tunnels under the rubble, resulted in the rescue of another eight survivors. The tunnelling experts were later honoured by the Singapore government for their efforts.

The last survivor, 30-year-old Chua Kim Choo, was rescued on 18 March 1986, having survived after hiding beneath a table.[13] Seventeen people were rescued and 33 died following the six-day rescue operation that ended on 21 March.

Many potential causes of the accident were investigated. Surviving sections of concrete were tested to ensure they were built to proper construction standards and it was found that they were. The undergoing construction work at the same time of the underground railway – built by tunnellers who had assisted in the rescue – was investigated, even though the excavations were more than 100 yards (91 m) from the collapsed building. It was found they had no effect on the building's stability.

Also investigated were the various additions made to the building after its initial construction. Air conditioning systems had been constructed on the roof of the building, the bank had added a large safe, and ceramic tiles had been fixed to the building's exterior, all adding considerably to the building's weight. It was found that the weight of these additions was inconsequential: the original structural engineer had made an error in calculating the building's structural load. The structural engineer had calculated the building's live load (the weight of the building's potential inhabitants, furniture, fixtures, and fittings) but the building's dead load (the weight of the building itself) was completely omitted from the calculation. This meant that the building as constructed could not support its own weight. Three different supporting columns had failed in the days before the disaster, the other columns – which took on the added weight no longer supported by the failed columns – could not support the building.[14]

According to the local Channel News Asia (CNA), Lian Yak Building was designed by an unqualified draftsman instead of a professional structural engineer. An investigator found that he had over-estimated the dead weight which the columns and walls could support. The draftsman claimed that the building owner Ng Khong Lim, who eventually died in the collapse incident, had appointed him to design Lian Yak Building but Ng directed that building work. The investigator also found that Ng requested to use inferior materials to build Lian Yak Building in order to reduce the cost – ultimately costing his life.[15][16]

On 27 April 1986, the Government of Singapore honoured five individuals for their assistance in rescue efforts, including three from Ireland, one from the United Kingdom and a local Singaporean.[17] A dinner was also hosted by the Singapore government on 29 April 1986 for public transport operator SMRT Corporation staff involved in the rescue efforts, with Minister of Communications and Information, Yeo Ning Hong, as the guest of honour.

Following this disaster, all buildings built in the 1970s in Singapore were thoroughly checked for structural faults, with some of them declared structurally unsound and evacuated for demolition, including the main block of Hwa Chong Junior College and Catholic High School campus at Queen Street.[18]

The government also introduced tighter and stringent regulations on building construction; since 1989, all structural designs are required to be counter-checked by multiple Accredited Checkers.[19] The Singapore Civil Defence Force (SCDF) also underwent a significant upgrade, in terms of training and equipment, to improve its readiness in performing future possible complex rescue operations.

Five years after the collapse, construction work commenced on the site for a new seven-story hotel on 28 March 1991. The Fortuna Hotel opened with 85 rooms in 1994.[20]