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PROJECT / CONTRACT REF.: 3839 / GC 14113600 CONTRACT TITLE: -
MISC INSTRUMENTATION PCR’S AT RG PLANT IN DUKHAN FIELDS DOCUMENT TITLE :
METHOD STATEMENT FOR SCAFFOLDING WORKS
EPIC CONTRACTOR :
IMCO Engineering & Construction Company W.L.L. P.O. Box: 22803 Doha, Qatar Tel: (+974) 44667903/10/24 Fax: (+974) 44667905 Email: [email protected]
06.03.2016
0
ISSUED FOR REVIEW / COMMENTS
GGT
FT
SS
DATE
REV. NO.
REASON FOR REVISION
PREPARED IMCO
CHECKED IMCO
APPD. IMCO
DOCUMENT NUMBER.
3839-RG-0-19-0002
SHT
1
OF
25
APPD. QP
REV.
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TABLE OF CONTENTS
1.
PURPOSE.......................................................................................................................................... 4
2.
OBJECTIVES..................................................................................................................................... 4
3.
SCOPE............................................................................................................................................... 4
4.
REFERENCES.................................................................................................................................... 5
5.
DEFINITIONS................................................................................................................................... 6
6.
PROCESS.......................................................................................................................................... 6 6.1
SCAFFOLD MATERIALS.......................................................................................................................................... 7
6.2
FALL ARREST DEVICE............................................................................................................................................ 7
6.3
ERECTING OF SCAFFOLDS.................................................................................................................................... 7
6.4
GENERAL INSTRUCTION..................................................................................................................................... 10
7.
SCAFFOLDING DESIGN............................................................................................................... 10
8.
RESPONSIBILITY........................................................................................................................... 11
9.
PRE-REQUISITES........................................................................................................................... 12
10.
GENERAL ERECTION PROCEDURES...................................................................................... 13
10.1
PLANNING............................................................................................................................................................ 13
10.2
BRACING & TIES................................................................................................................................................. 13
10.3
GUARDRAILS........................................................................................................................................................ 14
10.4
SCAFF TAGS.......................................................................................................................................................... 14
10.5
DISMANTLING...................................................................................................................................................... 14
11. 11.1
SEQUENCE OF SCAFFOLDING ERECTION ............................................................................ 15 METHOD OF WORKS......................................................................................................................................... 15
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HEALTH AND SAFETY CONSIDERATION............................................................................. 16
12.1
JOB SAFETY ANALYSIS....................................................................................................................................... 16
12.2
ENVIRONMENTAL & HEALTH SAFETY REQUIREMENTS................................................................................ 16
12.3
PERSONAL PROTECTIVE EQUIPMENT............................................................................................................... 17
12.4
INFORMATION TO PERSONNEL......................................................................................................................... 17
12.5
EMERGENCY PROCEDURE............................................................................................................................. 17
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DOCUMENT TITLE
1.
METHOD STATEMENT FOR SCAFFOLDING WORKS
PURPOSE This procedure provides guidance to all workers involved in scaffolding activity works under the Misc. Instrumentation PCR’s at RG Plant in Dukhan Fields The purpose of this procedure is ensuring IMCO develops and effectively implements the Company policies, systems and provisions for the use of fall arrest and body recovery equipment. This procedure is structured to minimize the risk of injury to its employees and subcontractors.
2.
OBJECTIVES This procedure provides guidance to personnel involved in scaffolding works and shall apply to all scaffold activities in RG Plant area.
3.
SCOPE The scope of this plan is to establish the individual activities to be performed for the installation of scaffolding structure within the scope of work of GC 14113600 as per the project works requirement. This procedure should be applied in all scaffolding activities as per this contract no. GC 14113600 inside RG Plant within the following PCR’s;
Sl
PRC’s #
Type of Scaffold
Area
Height
Length
Width
Quantity
1
PCR 13/02 ARBD
Tower scaffold
95 Area V-9503A
6M
4M
2M
1
2
PRC 14/02 ARBD
Independent
95 Area V-9503A
2.5 M
2M
1M
1
3
PCR 14/06 ARBD
Tower scaffold
Main Control Room
4M
4M
2M
1
4
PCR 14/07 ARBD
Mobile scaffold
93 Area
4M
4M
2M
1
2M
2M
2M
1
5
PCR 14/09 ARBD
95 Area outside LER 1
4M
4M
2M
1
95 Area pipe rack
8M
4M
4M
1
95 Area pipe rack
1M
40 M
2M
1
Tower scaffold Bridge scaffold
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DOCUMENT TITLE
METHOD STATEMENT FOR SCAFFOLDING WORKS
Mobile scaffold
6
PCR 14/10 ARBD
Independent scaffold
95 Area
4M
2M
2M
1
92 Area above
2M
40 M
2M
1
2M
20 M
2M
1
8M
36 M
4M
1
2M
2M
2M
3
2M
2M
2M
9
4M
2M
2M
2
4M
2M
2M
2
12 M
2M
2M
1
2M
2M
2M
2
4M
2M
2M
3
92 Area below 94 Area
Independent scaffold 7
95 Area
PCR 14/11 ARBD
8
PCR 14/13 & PCR 14/14 ARBD
9
PCR 14/20 ARBD
4.
Tower scaffold
95 Area V-9506
Independent scaffold
97 Area
Tower scaffold
94 Area V-9450
32 M
4M
4M
1
Independent
94 Area F-9450
4M
16 M
2M
1
Tower scaffold
94 Area F-9450
20 M
4M
2M
1
REFERENCES IMCO ensure that all HSE requirements in below references are strictly followed. QP HSE Regulation for Contractors - Doc No QP-REG-S-001 Rev. 3 Permit to Works system – Dukhan Fields - Doc No IP-OPS-015 Rev. A2 Procedure for Conducting Toolbox Talks in Dukhan Fields - Doc No QPR-DKN-22 Job Hazard Analysis - Doc No IP-OPS-066 Rev. A1 Scaffolding Works for Dukhan Fields - Doc No IP-OPS-030 Rev. A2
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DEFINITIONS Scaffold
– a temporary structure assembled to provide safe access to a work area, and to facilitate controlled lay down and storage of materials and / or equipment on the structure.
Scaffold Tag
– An administrative tool, i.e. a plastic card displayed on the scaffold structure, used to control and records the operational status of the scaffold.
Safety Harness – a safety harness fitted with a restraining line of lanyard and attached to an anchorage point, is to arrest safely a limited free fall by the wearer. It should be fitted with a restraining line or incorporating a pulley system, which pays out the line on demand and rewinds it automatically when not required. In either case, in the event of fall, the anchorage locks on to the anchorage line should be within one meter of the point at which the load is first applied, thereby limiting the fall. Safety Lanyard – a safety lanyard is a piece of rope with loops for attachment of as safety belt or harness to an anchorage point. It should be made of synthetic fiber rope and may incorporate a shock-absorbing device to provide the necessary degree of shock-absorption. It must be limited in length so that the safety belt or harness is restrained to within allowable free fall distance. 6.
PROCESS
Ensure that all scaffold work in Dukhan Fields operations areas is covered under the Permit to Work System and a separate work permit shall be issued for erecting or dismantling of each scaffold.
Ensure that all scaffolding shall be erected, dismantled or modified by a qualified scaffolders only which approved by QP 3rd party scaffolding training center.
A work permit for the erecting of scaffold cannot be signed off as complete until the scaffold has been inspected and approved for use by the Scaffolding Supervisor.
A work permit for the dismantling of scaffold cannot be signed off as complete until the scaffold materials have been removed from the site to a dedicated storage area.
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METHOD STATEMENT FOR SCAFFOLDING WORKS
After a scaffold has been erected and approved for use, any planned work on the scaffold structure that requires a work permit must be conducted on a separate work permit.
6.1Scaffold Materials All scaffolds components, parts and materials shall conform to British Standard BS 5973 (1993), and shall be:
Maintained in good condition, free from corrosion damage or other defects. Stored in designated areas. The inventory of scaffold materials at the worksite shall be kept to the minimum numbers of lots required to complete the required work. Scaffold components and materials that are found to be damaged, defective or unsuitable for use shall be clearly identified (i.e. labelled as “Unfit for Use”), removed from service, and returned to the supplier premises. The removal and disposal of damaged/defective scaffolding materials is the responsibility of the scaffolding supervisor on site.
6.2Fall Arrest Device
Fall arrest devices must be used when scaffolders are exposed to a fall of greater than 2 meters, and are not protected by standard handrails or an appropriate enclosure. All scaffolders shall wear body harness and lifelines when working at a height above 2 meters.
6.3Erecting of Scaffolds
Scaffold that is erected by one scaffolding contractor may not be dismantled or modified by another scaffolding contractor. A scaffolding contractor shall only use their own scaffold materials for the erection of scaffold. Use Scaffolding shock bag for lifting the materials from down to up & vice versa. The scaffolding supervisor shall inspect and approve all erected scaffold structures and / or modifications to existing scaffold structures prior to their use, and shall complete the scaffold inspection record accordingly (see attachment 2).
6.3.1
Handrails
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METHOD STATEMENT FOR SCAFFOLDING WORKS
6.3.2
Toe boards
6.3.3
Toe boards shall be fitted to the edges of scaffold decking that is 2 meters or greater in height, and the boards shall have a minimum height of 155 mm. Toe boards must be fitted to the inside of the standards to prevent outward movement, and shall be secured by toe clips or lashed using 6.5 mm thick wire or rope.
Scaffolding Decking
6.3.4
side rails and end-rails. Handrails shall be fixed at a height of between 910 mm and 1150 mm above the level of the scaffold decking, and a mid-rail shall be installed halfway between the handrail and the decking. Handrail must be fitted to the inside of the standards to prevent outward movement.
Scaffold decking boards shall have a minimum of 38 mm thick and 203 mm wide (nominal measurements), and shall be clean, unpainted, and free of nails, cracks and warps. All boards shall be fitted with the end protection, i.e. hoop irons, and shortened boards shall have the end protection refitted. Boards shall be secured to the scaffolding poles with clamps or lashed using 6.5 mm thick wire or rope. Gaps between boards shall be as small as possible (close-boarded).
Bracing
DOC. NO.: 3839-RG-0-19-0002
All scaffold structures should be built on a firm and level base, with the use of base plates to ensure stability. Pipe work or other equipment must not be used for the securing of the scaffolds. Diagonal bracing shall be provided on all sides at all levels of the structure and bracing material shall not exceed 3 meters in length. Diagonal bracing shall be fitted at an angle of 45 degrees and, where possible, shall be assembled upwards from the base plate level. Scaffold poles over 2.44 meters in length shall be handled by two persons, to prevent the blind end from inadvertently striking personnel, equipment or instrumentation. Where scaffold cross-members are less than 2 meters above ground level, the cross-member shall be tapped with highly visible hazard warning tape.
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6.3.5
METHOD STATEMENT FOR SCAFFOLDING WORKS
Ladders
Ladders used to access scaffolds shall be constructed of metal or wood, shall be properly maintained and regularly inspected, and should be the proper length for the job.
Note: Fabricated ladders MUST NOT be used as an access in scaffold.
6.3.6
Ladders shall be placed on a secure footing and NEVER on boxes, drums or other unstable bases. The best angle for setting a ladder is approximately 75 degrees, and the ladder should rise at least 1 meter above the landing place. Ladders shall not be supported on their rungs, and rungs shall not be used to support scaffold boards. Ladders shall not be extended by lashing two ladder sections together. Vertical ladders shall not fasten securely in place at the top and bottom ends and at 750 mm intervals, and should be kept to a minimum length only for accessing a scaffold platform. Ladders shall be inspected at the same frequency and as part of the scaffold structure. Damaged or defective ladders shall be clearly identified, removed from service and returned to the supplier’s premises.
Scaffold Tag System
IMCO and sub-contractors shall use a Scaffold Tagging System to control the safe use of scaffold structures. The system shall include the following 2 tags. “Approved for Use” tag “Do not use” tag
The “Approved for Use” tag shall be attached to a scaffold structure that has been completed, inspected and is approved for the use for which it was constructed. This tag shall identify the following minimum requirements:
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Location of scaffold Date erected Requested by Scaffolding Supervisor’s signature Load bearing capabilities Re-inspection signatures REV. 0
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METHOD STATEMENT FOR SCAFFOLDING WORKS
The “Do not Use” tag shall be displayed on scaffold that is: In the process of being erected but not completed. Erected but awaiting inspection Deficient and requiring correction or modification
6.3.7
Any defects in materials and / or construction shall be recorded and the scaffold cannot be approved for the use until the noted deficiencies have been corrected. After the completed scaffold structure has been inspected and approved for use, the scaffolding supervisor shall remove the “Do not Use” tag and replace it with an “Approved for Use” tag, affixed in a clearly visible location.
Inspection
Scaffold structures shall be inspected at least once per week if the scaffold is being continuously used. If the use of the scaffold changes, i.e. from light duty purpose to heavy purpose, then the scaffold must be re-inspected for its use. Scaffolding structures shall be re-inspected after adverse weather conditions to ensure that they are structurally sound. Scaffolding that is not in regular use shall be inspected once per month or each time a new Work Permit is raised for work involving the use of the scaffold. Inspection dates and signatures must be recorded on the scaffold tag. All scaffold structures in “long term” use shall be audited on a regular basis by the scaffolding supervisor.
6.4General Instruction Wherever reasonably practicable, platforms with guard rail and toe boards should be provided for work at heights above two meters. Where this is not reasonably practicable and a person at work is exposed to a fall exceeding two meters, an appropriate and properly anchored fall-arrest device must be worn. 7.
SCAFFOLDING DESIGN The access and working scaffold listed in Table – 1, with their construction criteria shall be design by IMCO Scaffolding team in accordance with appropriate QP Scaffolding Works for Dukhan Fields Doc. No. IP-OPS-030 Rev. A2. All other scaffold, and all scaffold which
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METHOD STATEMENT FOR SCAFFOLDING WORKS
are the subject of a specific user request outside the specified format of Table - , shall be designed by IMCO Scaffolding Team to the requirements and approval of Client (QP).
Table 1 – Loads and Dimensions for Tubes and Fittings Scaffold Type of scaffold
Use of Scaffold
Scaffold loading per m2
Very light duty independent Very light duty independent General purpose
Inspection access and painting
75 kg.
Power cleaning, painting, light engineering Light engineering, e.g. welding or electrical
independent Heavy duty independent
Special purpose 8.
Maximum number of working platforms 1 working platform
Maximum spacing between standards 2.7 m.
Typical load examples per bay
150 kg.
2 working platform
2.4 m.
2 man+ tool. No materials
200 kg.
2 working platforms+ 1at very light duty 2 working platforms+ 1at very light duty
2.1 m.
2 men+175kg.of materials
2.0 m.
2 men+250kg.of materials
Heavy 250 kg. engineering, e.g. large pipe work of structural To be stated on design drawings
1 man+ tool. No materials
RESPONSIBILITY 8.1Safety Officer
Shall ensure that the scaffolding activities in GC 14113600 project are as per QP standards IP-OPS-030 Rev. A2. Shall ensure that only qualified scaffolding personnel are involved in scaffolding activities. Shall ensure the scaffolding personnel are complying with Permit to Work requirements.
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Shall ensure that scaffolding structures are re-inspected after adverse weather conditions.
8.2Scaffolding Supervisor / Scaffolding Inspector 9.
Shall ensure that all scaffolding personnel under his authority fully comply with this procedure and Permit to Work requirements. Shall ensure that all scaffolding is inspected regularly and up-to-date records are maintained. Shall ensure that all scaffold erected is checked properly as per standards. Shall ensure that “long term” scaffold structures are regularly audited and report submitted to the Safety Officer at site. Shall ensure that all damaged or defective materials are identified, tagged and returned to the stockyard premises.
PRE-REQUISITES Before initiating the scaffolding work activities at site, following pre-conditions will be satisfied: All scaffold work in GC 14113600 project is covered under the Permit to Work System and a separate work permit shall be issued for erecting or dismantling of each scaffold. Ensure proper survey should be done at site by the competent person to check the loose pockets, levelling and adequate space for scaffolding. Ensure that estimated materials will be prepared as per requirement to avoid any near miss at site. Layout of longitudinal and across sectional line on the actual ground. Scaffolding shall only be erected, dismantled or modified by qualified scaffolding personnel in accordance with QP requirements (IP-OPS-030 Rev. A2) Insure supported scaffolds consist of one or more platforms supported by the outrigger beams, brackets, poles, legs, uprights, post, frames or similar rigid support. Insure guardrails or personal fall arrest system for fall prevention/protection is required for workers on platforms 10 feet or higher. Insure working platforms/decks must be planked close to the guardrails. Insure planks are to be overlapped on a support at least 6 inches, but not more than 12 inches. Insure legs, post frames, poles, uprights must be on base plates and mud sills, or a firm foundation, and be plumb and braced. Ensure to check for safe access. Do not use the cross braces as a ladder for access or exit. A work permit for the erecting of scaffold cannot be signed off as complete until the
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scaffold has been inspected and approved for use by the scaffolding supervisor. Scaffolding inspector has been signed in the scaffold tag after he makes sure that scaffolding is safe to use. A work permit for the dismantling of scaffold cannot be signed off as complete until the scaffold materials has been removed from the site to a dedicated storage area. After the scaffold has been erected and approved for use, any planned work on the scaffold structure that requires a work permit must be conducted on a separate work permit.
GENERAL ERECTION PROCEDURES 10.1
Planning In order to satisfy the requirement of personnel intending to work from the working platform, the scaffolder will need to liaise with those personnel, the maximum load likely to be placed on the working platform, the area of working platform necessary to carry out the work, positioning of access ladders and a comfortable working height for the working platform will all need to be discussed. Any hazards involved with the erection shall be identified at the planning stage and appropriate precautions taken. Proximity to live electrical equipment or interface problems may need to be given consideration.
10.2
Bracing & Ties All scaffolds shall be braced and tied to form a rigid stable structure. There are minimum requirements for bracing and tying scaffold but these is a guide only to the scaffolder. A priority concern of the scaffolder is to provide a safe working platform free from movement. If this priority is not satisfied on completion of the minimum requirements for bracing and tying, the scaffolder is bound to include such extra ties and braces as in needed. 10.2.1 Braces With the exception of tower and single bay scaffolds, face braces shall be provided that are attached to the external row of standards of the scaffold as close to the junction of the ledger and standard as is practicable and extend to the full length and height of the scaffolding. Transverse braces shall be provided that are attached diagonally in every lift joining the internal and external standards at both ends of the scaffold and at intervals not exceeding 25 meters. Tower and single bay scaffolding shall be provided with braces diagonally in every face in every lift of the scaffold. 10.2.2 Ties
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METHOD STATEMENT FOR SCAFFOLDING WORKS
Ties shall be provided that are attached by 90 couplers to the outside and inside standards or ledgers as close as possible to the junction of ledgers and standards. They shall be located horizontally no further than one bay from the ends and at intervals not exceeding 3 bays. They shall be located vertically in the first lift and at intervals not exceeding 4 meters.
10.3
Guardrails All working platform above a height of 2 meters or at any height less than 2 meters where a hazard such as starter bars exists, shall be provided with double guard rails and kickboards to all open edges. The guard rails shall consist of a top rail erected 1 meter above the working platform and a midrail erected midway between the top rail and the working platform. Kickboards shall extend a minimum of 200mm above the working platform and shall be secured firmly to the standards. Puncheons may be fixed to the guard rails to facilitate the securing of kickboards if necessary.
10.4
Scaff tags Upon completion of the scaffolding the scaffolder supervisor/Inspector shall affix a scaffold complete Scaff tag to the base of the scaffold at the point of access. The Scaff tag shall display the following information;
Location Ref. No. Date erected Requested by Built by Foreman Signature Safe Working Load
During erection, alteration or dismantling of the scaffolding a scaffold incomplete sign of Scaff tag shall be displayed. Personal other than scaffolders are not permitted to access a scaffold while the incomplete sign or Scaff tag is displayed. 10.5
Dismantling
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11.
METHOD STATEMENT FOR SCAFFOLDING WORKS
Prior to any dismantling of scaffolding taking place and during the dismantling procedure, the following safety precautions shall be observed: The Scaff tag is to be changed from “Complete” status to “Incomplete” status. The area at ground level is to be barricaded with general purpose bunting and a sign displayed stating “Danger – Men Working Above” Use Scaffolding shock bag for lifting the materials from down to up & vice versa. All planks are to be turned to remove dust and dirt that may cause eye injuries. Care shall be taken to ensure personnel are not working below when plank cleaning is taking place. All horizontal tubes, once removed, shall be turned to the vertical to remove grit and metal flakes from inside the tubes to avoid eye injuries during lowering operation.
SEQUENCE OF SCAFFOLDING ERECTION 11.1
Method of Works
Lying of sole board horizontally on the ground along with longitudinal lines at a spacing of 1.2 meters. Placing of adjustable base plate/jack base on the sole board at a spacing of 1.2 meters. Placing of standard pipe on each base plate. Alignment of pipes for true 90 degrees vertically. Couple vertical pipes with horizontal bracing pipes at 300 mm above the base plate with the help of dual couplers. Similarly 2nd horizontal pipe will be braced at 300 mm below the top of the stand pipe. Fix across bracing at inclination of 35 degrees to 45 degrees with the help of Sewell couplers. After completion of frame work, stirrup heads/ U jack will placed, in the pipes, at top for support system of wood runners. Place of 100 mm x 100 mm x 4 meters long wood runners in the U jacks in longitudinal direction. Place of 75 x 75 x 4000 mm long wood runners on the 100 mm x 100 mm x 4 meters long wood runners in cross sectional direction for placing of ply board as slab bottom. Care will be taken for the beams with respect to more support by bracing of one or more horizontal at top level. A walk way platform of 1.2 meters wide will be made by extended horizontal pipes, along with the periphery of slab. Guard hand rails will be fixed on the external side to the walk way. Toe boards will be fixed on the guard rails. At 75 degrees angle monkey ladder will be fixed at both ends of walk way.
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DOCUMENT TITLE
12.
METHOD STATEMENT FOR SCAFFOLDING WORKS
After the completed scaffold structure has been inspected and approved for use, the scaffolding supervisor shall remove the “Do Not Use” tag and replace it with an “Approved for Use” tag, affixed in a clearly visible location.
HEALTH AND SAFETY CONSIDERATION 12.1
Job Hazard Analysis
Job Hazard Analysis (JHA) is a procedure to review job methods and uncover hazards that may have been overlooked in the layout of the PRC’s works activity and in the design of the machinery, equipment and tools or that may have developed after production started, or that resulted from changes in work procedures or personnel.
The objectives of this JHA is to ensure that the basic steps of a job or task are determined and identified any existing or potential hazards are documented to ensure suitable and sufficient controls are in place to enable individual work or task to be performed safely and effectively at all QP facilities under this Project.
One of the purposes of this JHA is to provide a method for the identification of hazards and control of risk arising from the workplace and the introduction of new workplace, processes and substances to the facility and the means by which these risks shall be eliminated or minimized.
To comply with relevant QP regulation and approved code of practice.
NOTE: See attached JHA file. 12.2
Environmental & Health Safety Requirements First Aid Facilities
– IMCO shall ensure adequate first aid resources are available at the jobsite.
Toilet Facilities
– IMCO shall ensure adequate toilet facilities are placed for staff working on this activity.
Site Work Rules
– IMCO shall ensure all activities are conducted
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DOCUMENT TITLE
METHOD STATEMENT FOR SCAFFOLDING WORKS
following the site work rules. Safety 12.3
- IMCO shall fully comply with all safety requirements.
Personal Protective Equipment Appropriate personal protective equipment should be issued to the workers for the specific work activities. Safety Shoes Safety Coverall (full body) Safety Helmet Safety Glasses Hand Gloves Dust Mask (as required)
12.4
Information to Personnel A pre task briefing will be carried out detailing the following information: Task assign to each workers Manual Material Handling Traffic Management / Safety What to do in the event of a first aid injury or other incidents happen at site. Heat Stress advice
12.5
Emergency Procedure In the event of an accident, the following procedures shall be followed; Immediately send a First Aider to the scene. Call Emergency control room – Dukhan regarding the location, type and nature of incident including casualty details. Inform the project manager, QP focal point. Stop all other activity in the vicinity. Ensure to switch off the entire engine. Remove or isolate any immediate dangers ONLY if safe to do so. Cordon the area to prevent the scene being further disturbed (to aid investigation) Give assistance as requested to the emergency services. Photograph the scene. (if possible) Take statement from witness. Carry out incident investigation
DOC. NO.: 3839-RG-0-19-0002
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