Written Answer by Ministry of National Development on safety of Sigma lifts
Feb 6, 2017
Mr Louis Ng Kok Kwang: To ask the Minister for National Development
(a) what steps is the Ministry taking or has taken to ensure that the Sigma lifts currently in operation are safe to use; and
(b) whether it will be taking any action against Sigma and its parent company.
Answer:
MND takes a serious view on the safety of lifts in Singapore. HDB has in place a comprehensive set of measures spanning lift procurement, installation and maintenance to ensure that lifts in HDB blocks are safe and fit for operation. In particular, lifts are procured through open tenders, and the evaluation process factors in quality and reliability of lift contractors. Audits, stress-tests and inspections in the presence of an independent Authorised Examiner (AE) are also conducted as part of a well-established lift commissioning process.
Sigma has been installing lifts in HDB estates for the past 10 years, and has generally met the prescribed performance standards. Out of the approximately 24,000 lifts in HDB estates, about 3,500 are Sigma-made lifts. However, for a recent batch contract awarded to Sigma in 2013, Sigma was unable to meet the timeline for lift installation. The contract is for 469 lifts (or less than 2% of the total number of lifts in HDB estates). Hence in late 2015, HDB restricted Sigma from tendering for new HDB lift contracts, to ensure that Sigma dedicated its resources to fulfil its contractual obligations. HDB also observed a higher-than-usual breakdown and fault rate in lifts from this batch contract in their first year of operations. The tender restriction has therefore not been lifted, and will continue until performance standards improve.
HDB’s investigations revealed that while the design and installation of the affected lifts complied with prevailing codes and standards, the doors and sensors were more susceptible to misalignment from knocks. This, coupled with frequent heavy and rough lift usage during the first year period due to renovation and moving activities, resulted in the higher lift faults.
HDB has instructed Sigma to rectify these issues and to carry out improvement works to ensure that the lift doors and sensors operate smoothly. HDB has also issued stern warnings to Sigma, and is closely monitoring the performance of its lifts.
Both Sigma and its parent company have channelled more resources towards addressing the issues. In particular, Sigma has undertaken the rectification works progressively, and the performance of the lifts has improved. HDB will continue to hold Sigma accountable for ensuring its lifts meet the required performance standards.