METHOD STATEMENT FOR CABLE TRAY, LADDER AND TRUNKING  INSTALLATION


TABLE OF CONTENTS
1. PURPOSE
2. SCOPE
3. REFERENCES
4. RESPONSIBILITIES
5. MAJOR PLANT & EQUIPMENT
6. MATERIAL HANDLING
7. CONSTRUCTION METHODOLOGY
8. EQUIPMENT AND TOOLS
9. PARTICULAR SAFETY PRECAUTIONS
10. ATTACHMENT
10.1 QUALITY RECORD No. 0004 – CABLE TRAY/ LADDER RACK AND TRUNKING INSTALLATION.
10.2 HSE RISK ASSESSMENT No. 0004 – CABLE TRAY/ LADDER RACK AND TRUNKING INSTALLATION.

1.0 PURPOSE
1.1 To ensure the Cable Tray / Ladder Rack and Trunking is installed according to Project Specification and Code and is ready to have cables installed.

2.0 SCOPE

2.1 This procedure shall apply during the installation of Cable Tray / Ladder Rack and Trunking Installation.
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3.0 REFERENCES
3.1 Company Site Safety Plan
3.2 Project Manuals/ Project Technical Specifications
3.3 Company- Quality Control Work Procedure
3.4 Company – Electrical Work Procedure
3.5 Company Project Quality Plan
3.6 Approved Installation drawings (As applicable)
3.7 Approved Material Submittal (As applicable)

4.0 RESPONSIBILITIES

4.1 Project Manager / Director

4.1.1 Shall be responsible for the overall construction activities.

4.2 Construction Manager / Superintendent

4.2.1 Shall be responsible for the overall implementation of this Method Statement; liaison/co-ordination with the Supervisor, Foreman and craftsmen to ensure efficient execution of works in accordance with the specification requirements.

4.3 Material Controller

4.3.1 Shall be responsible for receiving materials on site warehouse. He will check the materials for any damages during shipping, handling and storage.

4.4 Supervisor / General Foreman

4.4.1 Implementation of safe work method statement and risk assessment plan.
4.4.2 Arrange TBT prior to commencement of work.
4.4.3 Visit the area of work for no hazard items exist.
4.4.4 Organizing the site and work places so as to ensure that work is carried out to the required standard, with minimum risk to men, equipment and materials.
4.4.5 Ensure that the employees under his responsibility do not engage in unsafe work practices or take unnecessary risks.

4.5 Safety Officer

4.5.1 Enforce the Project HSE rules and regulation.
4.5.2 Implement HSE requirements as set out in Company HSE Plan
4.5.3 Ensure work permit has been obtained and implemented if applicable.

4.6 Tradesmen / Drivers / Operators / Welders

4.6.1 Follow Supervisor’s / General Foreman’s instructions.
4.6.2 Only authorized drivers / operators can operate the plants.
4.6.3 Only authorized welders can operate welding plants.

5.0 MAJOR PLANT & EQUIPMENT

5.1 All equipment/tools shall be inspected prior to use at site and Company ID tag shall be placed on equipment where applicable.
5.2 No modified tools may be used for any task.
5.3 All test equipment shall be checked to assure that they are in good condition and valid calibration certificates are maintained and available for review.
5.4 Operator’s documentation shall be verified as applicable.

6.0 MATERIAL HANDLING

6.1 All materials shall be submitted for approval prior to procurement and delivery to site.
6.2 Materials shall be inspected on delivery to site, to ensure compliance with the approved submittal. An Over, Shortage & Damage report shall be completed for all deliveries.
6.3 Materials shall be unloaded in a proper manner, by manual or as necessary, mechanical means, crane or forklift. Materials shall not be dropped to the ground, but lowered carefully.
6.4 Materials will then be reconciled with the mill certificates, where applicable and any uncertified /non-compliant materials will be removed into quarantine.
6.5 Material shall be stored appropriately or placed on shelving within the warehouse area.
6.6 All materials shall be stored on shelves within the warehouse and shall be segregated according to size and type.
6.8 Care shall be taken to prevent the ingress of dirt or foreign objects into materials.
6.9 Insulation materials shall be stored in the manufacturers packing to ensure it is maintained in a clean dry condition.
6.10 Items requiring preservation and maintenance shall be subject to the requirements of the Preservation and Preventative Maintenance Procedure.
6.11 Manufacturer’s instructions with regard to storage requirements shall form the basis for material storage and preservation.

7.0 CONSTRUCTION METHODOLOGY

7.1 QUALITY CONTROL:

7.1.1 The Quality Inspector shall ensure the cable tray conforms to the applicable Project Specification and Code, Shop Drawings and Purchase Order.
7.1.2 The cable tray shall be adequate width for disposing the cables at single depth with a 25% width allowance for future cables.
7.1.3 All braces and supports are adequate to carry the weight of the cable tray and cables. Fixing of cable trays support shall be disposed at regular intervals exceeding 1.5 m. and at 225 mm. from bends and intersections.
7.1.4 Fixing brackets and supports shall be fabricated from mild steel galvanized flat bar.
7.1.5 The tray is correctly anchored and expansion joints are installed where required.
7.1.6 All sharp edges have been filed to ensure no damage occurs to cable during installation and treated with a zinc rich paint and/or spray paint (as per manufacturer’s recommendation)
7.1.7 No obstructions to cable installation.
7.1.8 All cable trays shall be electrically continuous by means of flexible copper braid bond across each joint in the system and supplied by the same manufacturer.
7.1.9 Check correct use of factory-made fittings and accessories for change in direction, splices and drops. The use of customized splices, bends and offsets shall be made as an option if the factory-made fittings and accessories are not applicable to be used due to actual site condition/ constraint and subject for Engineer’s approval.
7.1.10 Spacing and working clearances from other trays, with tray with different system voltage levels.
7.1.11 Cable tray is mechanically connected to conduits or raceways they terminate too.
7.1.12 Cable tray installation does not conflict with other services.
7.1.13 Cable tray covers installed where required as per project Specification and Code.
7.1.14 The QC inspector shall use MME-QR-E-302 to record his inspection findings.

7.2 CONSTRUCTION ACTIVITIES

7.2.1 The Construction Manager shall ensure the construction department implements the necessary controls to ensure the installation of the cable tray system is in accordance with the project Specification and Code.
7.2.2 The Construction Supervisor shall issue the Request for Inspection (RFI) to the Quality Department as per the Inspection points in the applicable Inspection and Test Plan.
7.2.3 The Construction Supervisor shall complete the Quality Check Sheet (QR) and issue to the Quality Department with the RFI.
7.2.4 The Construction Supervisor shall ensure the cable trays are electrically continuous joint.
7.2.5 The Construction Supervisor shall ensure the fixing of brackets and supports.
7.2.6 All supports installed are level and plumb.

7.3 INSTALLATION PASSING THOUGH EXPANSION JOINT

7.3.1 The cable tray, ladder and trunking shall be joined by expansion fittings across the expansion joints of the building structure.
7.3.2 The selection and installation details of expansion joint shall recommended by the approved manufacturer of the client.
7.3.3 Fabricated expansion joint shall be used as another option, but the approval of SixCo/ COWI shall be obtained first prior usage and execution.
7.3.4 Ensure that all Cable Tray/ Ladder/ Trunking are bonded to the earthing system
7.3.5 Where cable tray/ladder/trunking passes through expansion joint, flexible earth link shall be provided
7.3.6 Rigid fitting across the expansion joints shall not be allowed.

8.0 EQUIPMENT & TOOLS

8.1 Cutting Machine
8.2 Hand Tools
8.3 Drilling Machine
8.4 Fastener/ Unibolts

9.0 PARTICULAR SAFETY PRECAUTIONS

The contents of this method statement shall form the basis of a toolbox talk for all operatives before the commencement of such works.

9.1 RISK ASSESSMENT

– Danger of hand or other injuries from cutting tools and sharp edge
– Danger of falls from heights.
– Falls, knocks or trips due to poorly lit areas within the structure.
– Danger of eye damage during cutting or grinding.
– Electrocution when using electric hand tools and extension leads.
– Danger of injury when lifting large duct sections.

9.2 RISK MANAGEMENT

9.2.1 Only trained operatives shall use such cutting tools as required to carry out the works. All operatives, skilled and unskilled shall be provided with gloves for hand protection.
9.2.2 All operatives shall be provided with full body safety harnesses when working at heights above two (2) meters as set out in this method statement.
9.2.3 Main contractor shall provide general lighting while (Company)shall provide the Task Lighting as required by the areas subject to poor lighting.
9.2.4 When cutting or grinding all operatives shall wear a full face visor. All other operatives in the general area of such work shall be made aware and avoid such areas.
9.2.5 All hand tools and extension leads shall be inspected before use to ensure they are in good working order, with no damaged or exposed elements. Leads shall be checked along their full length and plugs and sockets shall be of the correct type and rating.
9.2.6 Where scaffolding is required to be installed for the lightning/earthing installation, a Green Tag shall be attached to the scaffolding to identify that the scaffolding has been inspected and can be used for construction purposes.

10.0 ATTACHMENT

10.1 Quality Record No. 0004– Cable Tray / Ladder Rack and Trunking Installation.
10.2 HSE Risk Assessment No. 0004 – Cable Tray / Ladder Rack and Trunking Installation.