Programa Analítico
III. CONTRIBUCIÓN AL PERFIL DE EGRESO:
2. ASME B30.23
3. HSE Safety Notice 1/97
10.15.1 Requirements
The following covers the basic safety requirements that must be met when personnel are required to work from a ‘suspended work basket’ that has been raised by a mobile/pedestal crane.
10.15.2 Equipment
1. All lifting tackle used in the lift must have safety coefficient of at least twice that required for general lifting.
2. The workbasket and associated lifting equipment and lifting tackle must be marked with its respective SWL, identity and correct colour code. All lifting equipment and lifting tackle to be used in the operation must be pre-use inspected.
3. The crane shall be uniformly level within 1% of level and shall have firm footing under both crawler tracks or all outrigger pads.
4. Where a crane is used that has load-limiting and/or slack wire cut-out device, the correct operation of these devices must be confirmed before the crane is used.
5. Before starting the operation ensure that the wire rope is spooled correctly on the drum. 6. If the operation Risk Assessment identifies that there is danger from falling objects, or a
danger of striking overhead objects as the ‘suspended work basket’ is raised, suitable overhead protection for personnel in the carrier must be provided.
7. If the workbasket has access doors they must open in-wards and must have a device to prevent inadvertent opening.
8. Suitable high edge guardrails must be fitted to the workbasket to prevent personnel from falling from the workbasket. The floor of the workbasket must have a non-slip surface. 9. To cover the event of a failure to the primary lifting system with personnel suspended, a
secondary system capable of safely lowering the workbasket, or personnel from the workbasket, must be available.
10. Where appropriate warning labels must be attached to equipment to indicate known dangers. Labels shall also be fitted to warn against incorrect usage.
10.15.3 Personnel
1. All personnel involved in suspended workbasket operations must have; a. Agreed to do so.
b. Have received adequate training.
c. Be fully conversant with the requirements involved.
2. Confirm that all personnel in the workbasket are wearing appropriate Personal Protective Equipment (PPE).
3. The Risk Assessment must consider the practicability of issuing personnel with fall arresters anchored on the workbasket safety anchorage points.
4. Personnel in the workbasket must have a primary means of communication/attracting attention (e.g. hand-held radio) and a back-up system (e.g. whistle) if assistance is required.
10.16 Personnel Engaged in Suspended Work Basket Activities (Offshore & Onshore)
10.16.1 Authority
All suspended workbasket operations shall only be carried out using the BSP Permit to Work system.
To support the issuance of the permit to work, the attached suspended workbasket operations checklist shall be utilised for each individual transfer (Appendix 6).
For guidance on how to complete the work permit refer to HSE Module 03 “Permit to Work Procedure”.
10.16.2 Pre requisites
If a suspended workbasket operation is to be carried out the following must be produced before the operation can start:
1 Permit to Work. 2. Risk Assessment.
3. Lift Plan. (written step-by-step instructions) 4. Safety Check List.
10.17
Risk Assessment
1. All suspended workbasket operations must be subject to a risk assessment (Refer E95- 0311) and a lift plan. Refer to Appendix 14 for BSP’s risk matrix.
2. The risk assessment shall identify all reasonably foreseeable hazards and failure scenarios such that in all suspended workbasket operations the people are protected from being crushed, trapped, struck or falling from the workbasket.
3. Appropriate crane and work basket checks to be recorded in the plan.
4. A competent person shall carry out the checks and supervise the operation defined in the lift plan.
10.18 Other Considerations
1. To prevent personnel from walking beneath the suspended workbasket the area beneath the workbasket must be cordoned off.
2. If the work area is over water, personnel in the workbasket must wear an approved flotation device, and have a means of attracting attention in case they fall into the sea. Ensure a standby vessel is in close proximity with rescue boat ready for immediate launch. The crane operator must check immediately before the lift that the prevailing weather conditions are within the acceptable limits as per 10.20.
Check that other criteria required for the operation are met, e.g. personnel are wearing full body harness, and they have been briefed on all facets of the operation.
10.19 Critera
10.19.1 Crane Suitability
2. The certificate issued by the surveyor shall clearly indicate the crane is suitable for man- riding and fully complies with the requirements of ASME B30.23 or Lifting Operations and Lifting Equipment Regulations (LOLER 1998).
3. BSP’s Technical Authority must approve cranes used for suspended workbasket operations. BSP’s Technical Authority, prior to approval being granted, shall review all certification and maintenance records pertaining to the crane.
4. Load hooks shall be of the design that can be closed and locked. The mousing of the hook opening is not permitted.
5. All connections between the crane and the suspended workbasket shall be such that they cannot self-release under any circumstances.
6. Articulating or truck loading cranes (HIAB trucks) are not suitable for man riding duties and shall not be used.
Cranes, which are suitable for personnel lifting operations, shall be clearly marked at the operator’s location “SUITABLE FOR MAN RIDING” or “SUITABLE FOR LIFTING PEOPLE”. Cranes with a capacity of less than 10 tonnes shall not be used for suspended workbasket operations.
10.19.2 Work Basket
1. A surveyor from an independent third party certification authority shall certify the workbasket.
2. The certificate issued by the surveyor shall clearly indicate the workbasket is suitable for suspended work activities.
3. The work basket must be of an approved design and approved by BSP’s Technical Authority
4. BSP’s Technical Authority, prior to approval being granted, shall review all certification pertaining to the workbasket.
5. The purpose-built workbasket shall be designed to an International Standard i.e. BS EN 14502-1, AS 1418 or ASME B30. 23 or equivalent.
6. Two taglines shall be attached to the workbasket, both with a length of 3 metres. 7. There shall be no knots on the tag lines to minimise the chance of snagging.
8. The workbasket lifting gear, master links, slings, etc. shall have a factor of safety of at least 10 to 1. The workbasket shall be equipped with a double safety load line assembly composed of a main wire rope sling and a secondary shock absorbing safety line. The capacity of the wire rope sling and the secondary shock absorbing safety line shall be such that either the sling or safety line shall be able to carry the full load including the safety factor.
9. The shackle type to be used is the bow or safety-anchor type fitted with split pins, that is, bolt, nut and split-pin.
10. An anti-spin device shall be fitted between the load line and the workbasket upper master link. The anti spin device shall have a factor of safety of at least 10 to 1.
11. The worksite Supervisor and/or a Competent Authorised Person (CAP) shall perform subsequent inspections prior to each use.
12. The workbasket shall be thoroughly inspected every six months and load tested every twelve months or as recommend by the workbasket manufacturer.