Code of Practice - Workplace Safety and Health Council

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3.2.1 Permit-To-Work - A Permit-To-Work System (PTW) is a formalised system of controlling certain types of hazardous work (lifting operations included). A proper PTW involved the contractor applying for permission to carry out a certain work activity. In the application, he would state the scope and the conditions in which the work is to be carried out. An independent inspection is then conducted on-site to verify that appropriate control measures have been taken to mitigate any foreseeable risks. After confirming that the measures have indeed been taken, the application would then be approved by an authorised person (typically the project manager) who shall have oversight on the entire work process so as to avoid any situation of conflicting or incompatible work being carried out at the same time. The work can commence only after the permit is approved. 3.3 Lifting Plan Section 2 discussed the factors affecting the safe lifting operation and it is intended to provide guidance to the personnel planning for a lifting operation. A Lifting Plan should be developed based on the consideration of the factors listed – Machine, Material, Medium, Man and Method. Depending on the complexity of the lifting operation, details to be considered in the Lifting Plan will vary. 3.3.1 The primary objective of the Lifting Plan is to facilitate common understanding amongst the lifting crew for a safe outcome. The underlying principle is that all foreseeable risks are assessed and eliminated / mitigated. 3.3.2 In order to provide practical guidance, a template of a Lifting Plan is developed (see Appendix 2). The suggested template addressed key factors affecting safe lifting operations: • details of the load; • details of the lifting equipment / lifting gears used; • means of communications; • personnel involved in the lifting operation; • physical and environmental considerations; • sequence/ special precautions; and • sketch of the zone of operation. 3.3.3 Notwithstanding the above template, it is important to note that the factors recommended in the Lifting Plan are by no means exhaustive and personnel involved in planning lifting operation must consider factors that are unique to the situation, particularly for complex lifting operations. 3.4 Harmonisation of the Lifting Plan vis-à-vis Risk Assessment and Permit-To-Work 3.4.1 A RA for lifting operation would typically specify control measures such as appointment of competent personnel, usage of appropriately maintained lifting gears or demarcation of the lifting zone. These are needful and useful assessment, and should take into account the physical environment. Page 14 of 38
3.4.2 The Lifting Plan and the PTW system are actually part of the Risk Control stage of the RA process. A proper Lifting Plan/ PTW serves as a means of verifying that the necessary control measures have indeed been taken. They are complementary and should not be seen as mere paper exercises. 3.4.3 If the sample Lifting Plan/ PTW template recommended in Appendix 1 is used properly, it would meet the legislative requirements for Lifting Plan and PTW. 3.5 Changes to Lifting Plans As the Lifting Plan is developed based on a pre-determined set of parameters and consideration, any significant changes should result in a temporary stoppage of the lifting operation and a review of the Lifting Plan conducted. The following scenario should result in a review of the Lifting Plan. • Changes to the type and capacity of lifting equipment used. • Changes to the sequence of operations. • Changes requiring reconfiguration of the crane (boom/ jib length, outrigger beam length reduction, parts of hoist line, etc). • Changes in the rigging details which could result in a reduction in rigging strength or significant increase in rigging weight. • Changes in surrounding environment such as sudden presence of a temporary structure obstructing the operation. • Changes in the weather and environmental conditions which have an adverse impact to the lifting operation. • Changes to safety-critical personnel. Page 15 of 38
Page 1 and 2: Page 1 of 38
Page 3 and 4: Mr Ong Yong Seng - Shimizu Corporat
Page 5 and 6: SECTION 6: EMERGENCY AND CONTINGENC
Page 7 and 8: occurring. Unsafe lifting operation
Page 9 and 10: 2.2 Machine 2.2.1 Sizing of the lif
Page 11 and 12: persons from coming under the suspe
Page 13: SECTION 3: LIFTING PLAN 3.1 General
Page 17 and 18: installation of the equipment shall
Page 19 and 20: circumvents this problem allowing t
Page 21 and 22: confident of carrying out the lift
Page 23 and 24: • maintain his/ her position so a
Page 25 and 26: SECTION 6: EMERGENCY AND CONTINGENC
Page 27 and 28: 5. Personnel Involved In Lifting Op
Page 29 and 30: SAMPLE CHECKLIST FOR MOBILE/ CRAWLE
Page 31 and 32: SAMPLE CHECKLIST FOR TOWER CRANE AP
Page 33 and 34: APPENDIX 4 SAMPLE CHECKLIST FOR ELE
Page 35 and 36: Comments / Remarks: Inspected by: C
Page 37 and 38: available to all persons involved i

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