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202/04/2007Issue for ConstructionAJITH ES YANASET WALKERS RUDDELLT ISHIGAKI
104/03/2007Issue for ConstructionAJITH ES YANASET WALKERS RUDDELLT ISHIGAKI
THIS DOCUMENT CONTAINS CONFIDENTIAL AND PROPRIETARY INFORMATION OF ISHIKAWAJIMA HARIMA HEAVY INDUSTRIES CO.,LTD. (IHI). THE DOCUMENT ALWAYS REQUIRES PRIOR WRITTEN CONSENT OF IHI FOR
(1) ITS REPRODUCTION BY ANY MEANS,
(2) ITS DISCLOSURE TO A THIRD PARTY,OR
(3) ITS USE FOR ANY PURPOSE OTHER THAN THOSE FOR WHICH IT IS SUPPLIED.QATAR LIQUEFIED GAS COMPANY LIMITED (II)QGX
KAEFERQG II Onshore Project LNG Storage FacilitiesE P C of LNG Storage Tanks
IHI TOKYO1METHOD STATEMENT FOR SCAFFOLDING ERECTION AND DISMANTLING
QG II SITE OFFICETEL. 473-3714
JOB NO. : 5022-422REV.2
CTJV DOC NO :
DRAWING NO. : V9600-2035
CTJV DWG. NO : QGX-SC-101-B-7736
Ishikawajima-Harima Heavy Industries Co., LtdINDEX
1.0 SCOPE OF WORK
2.0 JOB CHECKLIST
4.0 JOB LOCATION
6.0 MATERIALS / EQUIPMENT / RESOURCES
8.0 SITE COORDINATION
11.0 JOB SAFETY ANALYSIS
0.0 PURPOSE0.1 The Purpose of this Task Methodology is to ensure a detail control, set correct practices for the scaffolding works through the general and specific procedures contained herein and define the procedure of the scaffolding works for the painting of LNG storage tanks and associated piping at Qatar Gas Onshore Expansion Project as per IHI, CTJV, Qatar Gas specifications and QG II Scaffolding Codes of Practices.
1.0 SCOPE OF WORK
1.1 This document covers the procedures to be complied with for the erection, inspection and dismantling of scaffolding works necessary to gain access, where Surface Preparation and Painting works are to be carried out at staircase and emergency ladder cage area Qatar Gas II LNG Storage tanks and associated piping for the Qatar Gas Onshore Expansion Project, Ras Laffan, Qatar in strict accordance with Client requirements and BS 5973 Code of practices.
2.0 JOB CHECKLIST
2.1 List down checklist need to be done prior to start of work
TPI for qualified Scaffolders and Supervisor
Crane TPI, etc.
Contract Document Reference No. QG II-L-IS-CA-001.
Qatar Gas Project Specification for Lean LNG storage Tanks
QGX/27/71/ME/TS/NA/501 Rev. B1
Scope of work for painting of concrete surfaces of LNG Tanks
S8000-0080, Rev A.
IHI EHS Plan S9600-5009, Rev 1.
BS 5973 Scaffolding Code of Practices
4.0 Job Locations
Scaffolding work has to be done at the ladder escape locations, staircase, down comer pipes and on the roof of the tanks and where ever there is obstruction to use gondolas.
5.1 The supply of all scaffolding materials and accessories at stair case area, emergency ladders and associated piping to be the responsibility of Cape.
5.2 The supply of competent Supervisor and Scaffolders to be the responsibility of Cape.
5.3 Cape responsibility for particular personnel as follows:-
a)The Site Manager shall be overall responsible for execution of the works. He will be responsible for day to day construction activities and its quality and compliance with EHS requirements.
b)The scaffolding inspector/ supervisor shall be responsible for the inspection and approve for use erected scaffolds and maintain a scaffold register. He will be reporting to the site Manager. He is responsible for the inspection of scaffolding materials signatory or scaff-tag after weekly inspections.
c) The Scaffolding Foreman will be responsible for the implementation of the works. Directly reporting to Site Manager.
d) Safety officer will closely monitor the activity and recommend precautionary safety measures to the concerned supervisor if any unsafe act and condition noted during the activity
e) Scaffolders, helpers, crane operator and banksman will be complying with the safety precautions mentioned by the supervisor and the working procedures and will be the part of the team.
6.0 MATERIALS/ EQUIPMENT/ RESOURCES
6.1 All the scaffolding materials shall be inspected before despatching at site or upon arrival at site. Damaged or defective material shall be removed before taken into use.
6.2 Scaffold tubes and fittings shall meet the requirements of BS 1139. Scaffolding boards shall conform to BS 2482.
6.3 Tools like spanners, Ratchet, spirit levels will be used for the erection/ modification of the scaffolds and will be inspected prior to use. Damaged tools will be repaired or replaced.
6.4 Forklifts will be used for material handling and crane to shift materials to the roof.
7.1 Erection, Modification and Dismantling of Scaffolding
Light duty scaffolding shall be erected at a distribution load of 1.5KN/m2 as per table 1 (appendix 1) in line with the British Standard BS 5973:1993 Code of Practice for working scaffolds and special scaffold structures in steel.
Scaffolds shall be erected, modified or dismantled only by qualified scaffold personnel.
All such qualified workmen shall operate under the control of a qualified supervisor.
Prior to the starting of any erection, modification or dismantling activity the location shall be barricaded with warning tape and sign boards placed.
The erection, modification or dismantling of scaffolding shall be in line with BS5973 Code of practices, Technical Manual, Qatar Gas/CTJV/IHI specification and project requirements.
Wherever possible, erecting or dismantling the scaffold will work from minimum of a three board run. It is not acceptable for scaffolders to be perched on tubes, unless a fall arrest device is provided and secured to a suitable above head height anchorage point at all times.
Ladders will be properly lashed throughout the vertical height of a scaffold as it progresses. Erecting the scaffold will use the ladders to gain access to the working levels.
Tubes or boards being used in the construction of the scaffold will be stored flat in a neat and tidy manner. They will not be stacked vertically against the scaffold. Material will not obstruct access/ egress.
Loose tubes, clips or boards will not be left on a scaffolding after its completion.
Where Scaffolders are erecting a slung or cantilevered section or crawling around on a pipe bridge or other structural steelwork they will, in all instances where there is a possibility of falling more than 2 metres, wear a full body safety harness and life line which will be hooked off at all times above head height.
Where a scaffold is left in an incomplete state, the bottom ladder will be removed and a notice will be secured to the lower lift stating Danger Incomplete Scaffold Keep Off.
Where one section of a working platform is incomplete, access may be gained to the completed section provided that a stop end, preventing entry, is placed over the working platform at guard-rail height. A notice stating Danger Incomplete Scaffold Keep Off will be secured to the stop end. This notice will be in the appropriate languages.
Handballing will be the normal method of erecting, modification and dismantling a scaffold. Where, however, a scaffold consists of a considerable number of lifts a gin wheel may be used, provided the following requirements are met :-
The cantilevered tube to which the gin wheel is secured does not project more than 760mm beyond the scaffold, unless it is adequately supported.
The cantilevered tube is secured to the inside and outside standard using right angle couplers. Both standards to be diagonally braced.
The fibre rope which shall have a minimum diameter of 18mm will be checked daily by the approved Scaffolding Supervisor and discarded if unfit for use. One complete rope should be used and knotted together sections are not permitted.
Gin wheels to be color coded and inspected. Barricade signs should be placed in the bottom points where gin wheel is used.
The maximum load to be lifted by a Gin Wheel will not exceed 50 kg.
The dismantling of scaffolding is started from top level and progressed to the bottom.
After the completion of erection, modification or dismantling the area shall be cleaned for any debris.
After the completion of erection and or modification of scaffold a competent scaffold inspector/supervisor shall inspect the scaffolding.
All scaffolds will be inspected prior to use, at every seven-day periods thereafter, before use following severe weather conditions or other damages caused by an external force and after modification. The result of inspections shall be registered into log book.
Any defects observed during inspection shall be rectified and re-inspected.
After successful completion of inspection the scaffolding inspector/supervisor shall put a green tag scaff-tag with relevant details and duly signed.
7.3 Scaffold Users
Scaffolds will be used for the purpose to which th