Understanding Line Works
Line work depends on control at every stage of the operation.
Conductor and OPGW activities involve more than moving a line from one structure to another. Earthing, access equipment, rigging, fittings, pulling arrangements, network conditions and the approved construction sequence all need to work together before installation or transfer activities can proceed.
AI Engineering carries out these activities in accordance with the approved project information, RAMS, permits and site controls applicable to the works.
How Line Works Progress
A controlled sequence from preparation to de-rigging.
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01
Review & Prepare
Review the approved project information, working methodology, access arrangements, network conditions, plant and equipment required for the activity.
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02
Earth & Make Safe
Apply the required conductor, earthwire or drain earth arrangements in accordance with the permits and project controls applicable to the work.
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03
Rig the Work Section
Install the required rigging ropes, running equipment and working/access equipment needed for the planned line activity.
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04
Install or Transfer
Carry out the conductor, earthwire or OPGW installation, replacement or transfer activity defined by the project scope.
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05
Complete Fittings & Line Activities
Complete the relevant fittings, sagging or associated line-work activities in accordance with the approved project information.
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06
De-Rig & Record
Remove temporary rigging and drain earths as required and complete the relevant construction, QA and handover records.
Practical Line-Work Capabilities
Site activities coordinated around the approved line information.
Conductor Earthing
Application and removal of the earthing arrangements required for the planned line activity, in accordance with the applicable permits and site controls.
Rigging & Access Equipment
Installation and use of rigging ropes, running equipment and working/access equipment required to support controlled line-work activities.
Earthwire & Fittings
Removal, replacement and installation activities involving earthwire fittings and associated line components where included within the project scope.
OPGW Installation
Controlled installation or replacement of OPGW in accordance with the approved project information, handling requirements and construction methodology.
Conductor & Earthwire Transfers
Transfer of existing conductors or earthwire between structures where required as part of approved diversion or modification works.
Sagging & Completion Activities
Sagging-related construction activities, checks and records where these form part of the agreed line-work scope.
Control of the Work Section
The line, structures and working area have to be treated as one operation.
Permits & Network Conditions
The activity is coordinated with the permits, outage arrangements and network conditions applicable to the planned works.
Earthing Arrangements
Required conductor, earthwire and drain-earth controls are established before the relevant line-work activities proceed.
Working at Height
Access and working equipment are established in accordance with the approved methodology and site controls.
Rigging & Running Equipment
The correct rigging and running equipment is positioned for the conductor, earthwire or OPGW activity being undertaken.
Fittings & Interfaces
Existing and new fittings are handled in the correct sequence for the approved installation, transfer or replacement activity.
Checks & Records
Site engineering and QA checks support hold points, construction records and handover documentation.
Simple Process Flow
How does a line-work activity move from approved information to completion?
- Approved Project Information
- Permits / Network Controls
- Earthing & Work-Section Preparation
- Rigging & Access Equipment
- Install / Transfer / Replace
- Fittings / Sagging / Completion Activities
- De-Rig, Check & Record
OPGW Works
Installation controlled through the same disciplined line-work sequence.
OPGW activities can require the existing earthwire arrangement, fittings, rigging, access equipment and pulling operation to be managed as one coordinated activity.
AI Engineering supports OPGW installation or replacement within the agreed construction scope, working to the approved project information, handling requirements and site methodology applicable to the scheme.
- 01Work-section preparation
- 02Conductor and earthwire earthing controls
- 03Rigging and access arrangements
- 04Existing earthwire and fitting activities
- 05OPGW installation or replacement
- 06De-rigging and completion records
What AI Engineering Does
Practical line-work delivery against approved project information.
AI Engineering coordinates the site activities required to prepare, rig, execute, check and record conductor, earthwire and OPGW works within the agreed construction scope.
- Site and work-section preparation
- Earthing and line-work controls
- Rigging and access equipment
- Conductor, earthwire and OPGW activities
- Fitting and completion activities
- Site engineering and QA records
Where It Fits in OHL Construction
Connecting erected structures into the working overhead-line system.
Once the required structures are available, conductor, earthwire and OPGW works connect those structures into the next stage of the overhead-line construction or modification sequence. These activities can also form part of diversions where existing conductors or earthwire need to be transferred onto new infrastructure.
The exact sequence depends on the network conditions, approved methodology and project scope.
Project Outputs
Line-work records that support verification and handover.
Exact records and outputs depend on the agreed project scope, client requirements and line-work activities being undertaken.
Construction RAMS
Task-specific working arrangements and risk controls applicable to the planned line-work activity.
Inspection & Hold-Point Records
Site engineering and QA records associated with the relevant construction checks and hold points.
Installation / Transfer Records
Project-specific records associated with conductor, earthwire or OPGW installation or transfer activities where required.
Sagging Records
Sagging-related construction records where sagging activities form part of the agreed project scope.
QA Documentation
Quality documentation associated with the completed line-work activities.
Completion / As-Built Information
Relevant completion and as-built records prepared in the format required by the project.