WSH circulars

Read all the WSH circulars from MOM. They inform stakeholders in the WSH industry about their duties and responsibilities.

WSH circulars 2025

Circular	Date	Category
MOM / OSHD / 2025-04 Enhanced licensing conditions for approved scaffold contractors	23 Jun 2025	Others
MOM / OSHD / 2025-03 Advisory on emergency response for injured workers	12 Feb 2025	Workplace Health
MOM / OSHD / 2025-02 Safe Design and Installation of Outriggers or Overhead Supports for Suspended Scaffolds	10 Jan 2025	Lifting Equipment
MOM / OSHD / 2025-01 Mandating forklift operator refresher training course	3 Jan 2025	Training

Circular	Date	Category
MOM / OSHD / 2024-10 Traceability and Reusability of Formwork Structures and Scaffolds	22 Nov 2024	Engineering materials
MOM / OSHD / 2024-09 Enhancing patient care through accurate diagnosis and reporting of occupational diseases	25 Nov 2024	Workplace Health
MOM / OSHD / 2024-08 Protecting employees’ and customers’ health from chemicals in nail salons	30 July 2024	Chemicals
MOM / OSHD / 2024-07 Mandatory installation of stability control system in new lorry cranes	3 July 2024	Lifting equipment
MOM / OSHD / 2024-06 WSH Coordinator Refresher Training	1 July 2024	Training
MOM / OSHD / 2024-05 Safety considerations in installation and maintenance of air-conditioning condensing units and their structural-supporting system	3 Jun 2024	Others
MOM / OSHD / 2024-04 Mobile Crane Load Test	17 Apr 2024	Lifting Equipment
MOM / OSHD / 2024-03 (revised) Legal Requirement to complete the Top Executive Workplace Safety and Health Programme (TEWP)	19 Mar 2025	Training
MOM / OSHD / 2024-02 Safe storage and handling of flammable substances	6 Feb 2024	Fire/Explosion
MOM / OSHD / 2024-01 Enhancement to Workplace Safety and Health requirements in public sector construction and construction-related projects Annex A: Summary and guide to implement the enhanced safety requirements and additional measures in public sector projects Annex B: Electronic permit-to-work specifications template Annex C: Vehicular safety technology specifications template	2 Feb 2024	Safety Accountability, Focus and Empowerment (SAFE) measures

Circular	Date	Category
MOM / OSHD / 2023-06 Safe Installation of Photovoltaic (PV) System	8 Sep 2023	Construction activity
MOM / OSHD / 2023-05 (revised) New WSH e-Services system with enhanced features for management of lifting equipment and pressure vessels	16 Apr 2025	Lifting Equipment, Pressure Vessels
MOM / OSHD / 2023-04 Joint circular on Adoption of Revised Singapore Standard SS586: Specification for hazard communication for hazardous chemicals and dangerous goods	6 Apr 2023	Chemicals
MOM / OSHD / 2023-03 Auditing Requirements for Safety and Health Management System for Marine Industry	22 Mar 2023	SHMS
MOM / OSHD / 2023-02 WSH Coordinator Refresher Training	16 Feb 2023	Training
MOM / OSHD / 2023-01 (revised) Suspension of red blood cell acetylcholinesterase (RBC AChE) medical examination test requirement for exposure to organophosphate compounds	3 Jun 2024	Workplace health

Circular	Date	Category
MOM / OSHD / 2022-05 Revised Demerit Points System for the construction industry	15 Sep 2022	Demerit Points System
MOM / OSHD / 2022-04 Training requirements for driving of truck mounted concrete pumps on non public areas	15 Sep 2022	Training
MOM / OSHD / 2022-03 MOM Safety time out requirement	1 Sep 2022	Heightened Safety Period
MOM / OSHD / 2022-02 (revised) Safe use of excavators/forklifts as lifting machines	28 Sep 2022	Lifting Equipment
MOM / OSHD / 2022-01 Auditing Requirements for Safety and Health Management System	1 Apr 2022	SHMS

Circular	Date	Category
MOM / OSHD / 2021-08 Requirements for Work Injury Compensation Insurance under Work Injury Compensation Act 2019	8 Dec 2021	Others
MOM / OSHD / 2021-07 Proprietary Table Formwork Safety	16 Nov 2021	Construction activity
MOM / OSHD / 2021-06 Guidelines on the use of chlorine containing chemicals for disinfection of swimming pools	14 May 2021	Chemicals
MOM / OSHD / 2021-04 Safety of workers during repair or maintenance of lifts	7 Apr 2021	Lift and hoist
MOM / OSHD / 2021-03 Uploading of all WSH Training Records to MOM	12 Apr 2021	Training
MOM / OSHD / 2021-02 Resumption of in-person WSH training under Phase 3	10 Mar 2021	Training
MOM / OSHD / 2021-01 Resumption of in-person WSH training under Phase 3	22 Jan 2021	Training

Circular	Date	Category
MOM / OSHD / 2020-10 Recommendation from learning report for fatal accident involving failure of a tower crane	6 Nov 2020	Lifting Equipment
MOM / OSHD / 2020-09 Resumption of in-person WSH training for worker / operator and supervisor-level courses	17 Aug 2020	Training
MOM / OSHD / 2020-08a Extension of validity of certificate for lifts, hoist and lifting platform	17 Aug 2020	Lifting Equipment
MOM / OSHD / 2020-07 Suspension of in-person WSH Training involving foreign workers Annex – Checklist of Safe Management Measures to resume WSH training	24 Jun 2020	Training
MOM / OSHD / 2020-01 Examination and testing requirements for statutory Lifting Equipment	19 Jun 2020	Lifting Equipment
MOM / OSHD / 2020-06 Resumption of activities at workplace premises during Phase 2 of Safe Reopening - Advisory on the safe use of Lifting Equipment and Pressure Vessel	19 Jun 2020	Lifting Equipment, Pressure Vessels
MOM / OSHD / 2020-04 In-person WSH training is suspended from 2 June 2020	1 Jun 2020	Training
MOM / OSHD / 2020-05 Suspension of activities at workplace premises to reduce COVID-19 transmission – Advisory on statutory examination and testing of lifting equipment and pressure vessel (1^st revision)	30 Apr 2020	Lifting Equipment, Pressure Vessels
MOM / OSHD / 2020-03 Suspension of activities at workplace premises to reduce COVID-19 transmission – Advisory on statutory examination and testing of lifting equipment and pressure vessel	5 Apr 2020	Lifting Equipment, Pressure Vessels
MOM / OSHD / 2020-02 Safe use of lifts undergoing major alteration or replacement works as workplace hoist / lifts	2 Mar 2020	Lift and hoist

Circular	Date	Category
MOM / OSHD / 2019-03 Do not bypass or override safety devices of mobile cranes	22 Nov 2019	Crane
MOM / OSHD / 2019-02 Construction worksites are no longer required to register with MOM	19 Sep 2019	Others
MOM / OSHD / 2019-01 Update of SAC accreditation status and submission of ConSASS Audit Report	8 May 2019	SHMS
Reminder on duties of employers in metalworking sector	11 Apr 2019	Others

Circular	Date	Category
001 / 2018 Issuance of Medical Leave Certificate (MC) or Light Duties to workers with work-related injuries	17 Sep 2018	RTW
Safe riding for delivery work	13 Aug 2018	Others
OSHD / SPECS / ESB / LE / 04-2018 Risk control measures for lift maintenance work	8 Aug 2018	Lift and hoist
OSHD / SPECS / ESB / LE / 01-2018 Data logger requirements for mobile cranes	27 Jul 2018	Crane
OSHD / SPECS / ESB / LE / 02-2018 Safe use of material hoist for the carrying of goods without persons from one defined level to another	5 Jul 2018	Lifting Equipment
OSHD / SPECS / ESB / LE / 01-2018 Safety clearance for gantry cranes at workplaces	24 Apr 2018	Lifting Equipment
Safe work at heights at completed buildings	1 Mar 2018	Construction activity

Circular	Date	Category
OSHD / SPECS / ESB / LE / 03 / 2017 Requirements for non-destructive testing of statutory equipment (Lifting Equipment and Pressure Vessels) under WSH Act	26 Jul 2017	Pressure Vessel
OSHD / SPECS / OH / 01 / 2017 Hazards of Tetramethylammonium Hydroxide (TMAH)	21 Jul 2017	Chemicals
OSHD / SPECS / ESB / LE / 02-2017 Revised statutory examination for lorry cranes	15 May 2017	Crane
OSHD / SPECS / ESB / LE / 01 / 2017 Inspection of data loggers for mobile cranes	12 Feb 2017	Crane
20170125-76 Conduct and submission of ConSASS Audits	25 Jan 2017	SHMS

Circular	Date	Category
OSHD / SPECS / ESB / AE / 03-2016 Alignment of Authorised Examiner registration to SPE framework	29 Dec 2016	Authorised Examiner
OSHD / SPECS / ESB / AE / 01-2016 Factsheet on alignment to Authorised Examiner registration framework to SPE scheme	28 Nov 2016	Authorised Examiner
OSHD / SPECS / ESB / AE / 02-2016 Updates on requirements related to authorise examiner practices	18 Nov 2016	Authorised Examiner
Shaping a culture of good RoadSense with heavy vehicle community	26 Jul 2016	Others
OSHD / SPECS / ESB / LE / 01-2016 Testing and examination of "Floor Cranes"	30 Jun 2016	Lifting Equipment
20160620-73 ATPs and LSPs must seek MOM's approval before changing management staff	20 Jun 2016	Others
OSHD / OSHI / CS / 02-2016 Safe storage of combustible materials in construction	1 Jun 2016	Fire / explosions
OSHD / SPECS / ESB / LE / 01 / 2016 Medical examination requirement for crane operators	23 Mar 2016	Crane
OSHD / SPECS / ESB / PV / 01 / 2015 Quick-opening closures and pneumatic testing	25 Jan 2016	Pressure Vessel

Circular	Date	Category
OSHD / OSHI / CS / 01-2015 Collapse of reinforcement cage for the thick concrete slab	1 Sep 2015	Construction activity
OSHD / SPECS / ESB / LE / 02 / 2015 Requirement for data loggers for mobile cranes	1 Aug 2015	Crane
OSHD / SPECS / MHI / PS / 01-2015 Hazards and controls of combustible dusts	23 Jul 2015	Fire / explosions
OSHD / SPECS / ESB / LE / 01 / 2015 Tower crane control circuit systems	8 Jul 2015	Lifting Equipment
20150618-67 Enhanced demerit points system for the construction industry	18 Jun 2015	Construction activity
Safe use of storage racks	7 May 2015	Others

Circular	Date	Category
OSHD / SPECS / MHI / PS / 01-2014 Joint circular on safe handling and use of hydrocarbon refrigerants	20 Feb 2014	Fire / explosions
Advisory for professional engineers on formwork safety	18 Jan 2014	Construction activity
OSHD / SPECS / MHI / PS / 01-2014 Revised Singapore Standard SS 506: Part 3	10 Jan 2014	SHMS

Circular	Date	Category
20131121-062 Safe work practices during thermal fogging treatment	21 Nov 2013	Fire / explosions
OSHD / SPECS / ESB / ACC / 01-2013 Safe working at heights for Approved Crane Contractors (ACC)	26 Jul 2013	Lifting Equipment
OSHD / SPECS / OH / 07-2013 Prevention of fire during thermal fogging	15 Jul 2013	Fire / Explosions
OSHD / SPECS / ESB / AE / 01-2013 Prohibition of use of proxies to conduct tests and examinations of equipment required by WSH legislation to be certified by an Authorised Examiner	2 Jul 2013	Authorised Examiner
OSHD / SPECS / ESB / LE / 02-2013 Reminder on mandatory training requirement for lorry crane operators	26 Apr 2013	Lifting Equipment
OSHD / SPECS / ESB / PV / 01-2013 Revocation of the Factories (Persons-In-Charge) Regulations and Factories (Certificate of Competency – Examinations) Regulations	18 Mar 2013	Pressure Vessel
OSHD / SPECS / ESB / LE / 01-2013 Safe operation of gantry cranes at workplaces	4 Mar 2013	Lifting Equipment
OSHD / SPECS / MHI / PS / 01-2013 Vacuum / Gully sucker trucks in petroleum service	21 Jan 2013	Fire / explosions

Circular	Date	Category
OSHD / SPECS / OM / SME / 04-2012 Revision of laboratory reference interval for red blood cell acetylcholinesterase levels	18 Dec 2012	Workplace health
OSHD / SPECS / ESB / LE / 01-2012 Safe use of mobile elevating work platform (MEWP)	1 Oct 2012	Lifting Equipment
OSHD / SPECS / OM / HS / 01-2012 Managing heat stress in the workplace	15 Aug 2012	Workplace health
OSHD / SPECS / MHI / PS / 01-2012 De-oiling / Removal of flammable liquids from pipelines	2 May 2012	Fire / explosions
OSD / Kentledge Load testing on piles	5 Apr 2012	Construction activity
OSHD / Piling Rig Operation / ME044 Safe operation of piling machines	14 Mar 2012	Piling machine
OSHD / OSHI / MI043 Safety considerations in gate design and operation	1 Mar 2012	Others
OSHD / SPECS / ESB / LE / 03-2012 Mandatory training requirement for lorry crane operators	15 Feb 2012	Lifting Equipment

Circular	Date	Category
OSHD / SPECS / ESB / LE / 02-2011 Use of hydraulic jack-in piling (JIP) machines	12 Aug 2011	Piling machine
OSHD / WSHAOCir / 2011-1 Workplace safety and health (WSH) auditors	21 Jun 2011	SHMS
OSHD / Scaffold Suspended scaffolding requirements	31 May 2011	Lifting Equipment
20110425-39 Inspection and filling of compressed gas cylinders	25 Apr 2011	Pressure Vessel

Circular	Date	Category
OSHD / LE-1 / 10 Safe work procedures for operating lorry cranes on public roads	29 Jul 2010	Crane

Circular	Date	Category
20091120-37 Accidents involving use of gondolas	20 Nov 2009	Lifting Equipment
OSHD / LE-1 / 09 Load charts, operation manuals and safekeeping of maintenance and operational logs	18 Nov 2009	Lifting Equipment
2009-35 Lifts installation works	1 May 2009	Lift and hoist

Circular	Date	Category
OSHD / LE-1 / 08 Foundation anchors for tower cranes	26 Mar 2018	Crane

Circular	Date	Category
List of de-registered mobile cranes found to be illegally retrofitted	29 Mar 2007	Crane
OSD / ENG-CIR / LE-3 / 02 Limit on the years of service of mobile cranes: Extension criteria for the service life of mobile cranes	27 Mar 2007	Crane
20070119-29 Updated list of mobile cranes granted extension of service life	19 Jan 2007	Crane

Circular	Date	Category
Use of socket-outlet assembly in construction and building sites	28 Apr 2006	Construction activity
OSD / ENG-CIR / PV01 / 05 Requirement for testing of safety valves of steam boilers during statutory examinations	1 Mar 2006	Pressure Vessel

Circular	Date	Category
OSHD / ENG-CIR / LE-2 / 05 Safe use of lifting equipment	12 Sep 2005	Lifting Equipment
20050823-26 Swimming pool owners and operators	23 Aug 2005	Chemicals
DIS / ENG / CIRCULAR-13 / 99 Report of examination of test of pressure vessels	12 May 2005	Pressure Vessel
OSD / ENG-CIR / PV-02 / 05 Registration of steam boilers	27 Apr 2005	Pressure Vessel
DIS / ENG / CIRCULAR-10 / 99 Registration of pressure vessels	12 Apr 2005	Pressure Vessel
OSD / ENG-CIR / LE-1 / 05 Safety devices / features on tower cranes	2 Feb 2005	Crane

Circular	Date	Category
OSD / ENG-CIR / LE-02 / 04 Lifts and hoists	16 Oct 2004	Lift and hoist
OSD / ENG-CIR / PV-01 / 04 Requirement for piping, hose, tube connections for air receivers	16 Apr 2004	Pressure Vessel
1-04 Type approval of tower cranes	6 Mar 2004	Crane

Circular	Date	Category
OSD / ENG-CIR / PV-03 / 03 Requirement for safety valves for air receivers	7 Aug 2003	Pressure Vessel
OSD / ENG-CIR / LE-3 / 03 Truck mounted mobile cranes	18 Jul 2003	Crane
OSD / ENG-CIR / PV-02 / 03 Requirement of gas train for steam boilers (or furnace) using natural gas	25 Jun 2003	Pressure Vessel
OSD / ENG-CIR / LE-2 / 03 Registration of excavators	13 May 2003	Lifting Equipment
OSD / ENG-CIR / LE-1 / 03 Load testing of cranes	1 Apr 2003	Crane

Circular	Date	Category
OSD / ENG-CIR / PV 05 / 02 Factories (Examination and Test of Steam Boilers) (Exemption) Order 2002	18 Nov 2002	Pressure Vessel
OSD / ENG-CIR / LE-2 / 02 Automatic overload cut-off for mobile and tower cranes	26 Mar 2002	Crane
OSD / ENG-CIR / LE-1 / 02 Classification for storage and retrieval system	26 Mar 2002	Lifting Equipment
OSD / SC001 / 2002 Riggers and signalmen attire in construction and building sites	1 Jan 2002	Crane

Circular	Date	Category
OSD / ENG-CIR / LE-3 / 01 Inspection requirements for statutory lifting equipment	9 May 2001	Lifting Equipment
OSD / Eng / Circular-2 / 2001 Steam piping and associated fittings for pressure vessels and blowdown tanks for boilers	30 Mar 2001	Pressure Vessel
OSD / Eng / Circular-LE-1 / 01 Limit of service life of piling machines	31 Jan 2001	Piling Machine

Circular	Date	Category
OSD / Eng / Circular-LE-6 / 00 Interlocking gates on every lift landing for employee's lift in construction site	13 Nov 2000	Lift and hoist
OSD / Eng / Circular-LE-5 / 00 Exemption of lifts from requirements of the Factories Act	13 Nov 2000	Lift and hoist
2000-11 Technical advisory for laundry factories on the spontaneous ignition of laundry	1 Nov 2000	Fire / explosions
OSD / Eng / Circular-LE-4 / 00 Luffing jib tower crane	3 Aug 2000	Lifting Equipment
OSD / ENG-CIR / LE / 4 / 01 Safe use of mobile cranes in construction sites	1 Aug 2000	Engineering materials
Safe use, handling and storage of nitrocellulose	Jul 2000	Chemicals
OSD / Eng / Circular-LE-1 / 00 Inspection of tower crane	29 Jun 2000	Lifting Equipment
DIS / ENG-CIR / 3 / 2000 Inspection of pressure vessel	28 Jun 2000	Pressure Vessel
Guide to local fabricators of pressure vessels	Mar 2000	Engineering materials
Corrosion in autoclaves	Jan 2000	Engineering materials

Circular	Date	Category
DIS / Eng / Circular-13 / 99 Report of examinations of tests of pressure vessels	5 Aug 1999	Pressure Vessel
DIS / Eng / Circular-12 / 99 Repairs/Modifications of statutory pressure vessels and pressure piping	5 Aug 1999	Pressure Vessel
DIS / Eng / Circular-10 / 99 Registration of pressure vessels	5 Aug 1999	Pressure Vessel
DIS / Eng / Circular-7 / 99 Inspection of refrigeration plant pressure receiver	13 Apr 1999	Pressure Vessel