Table of Contents
- Purpose
- Scope of Work
- Definitions
- References
- Materials
- Plant & Equipment
- Safety
- Prior Activities
9.0 Procedure
9.1 Installation of Temporary and Interim Security Fence
9.2 Removal of Chain Link Fence
10.0 Responsibilities
11.0 Attachments
11.1 Drawing PGAD 745/1008/G-311-A-R 0
1.0 Purpose
- To ensure that all Installation of Temporary and Interim Security Fence, removal of chain-link fence, and related activities are executed safely and in accordance with the contract requirements and that all quality assurance / control activities are conducted in a systematic manner, works are inspected and conformance is verified and documented.
2.0 Scope of Work
- This procedure is applicable to the following works associated with the project titled, New 2k Runway – Main Runway Works”- contract number
- Installation of Temporary and Interim Security Fence
- Removal of Chain Link Fence
3.0 Definitions
- PM Program Manager
- Engineer Engineer of Record
- CM Construction Manager
- ACM Airside Coordination Manager
- PE / SE Project Engineer / Site Engineer
- CS Chief Surveyor
- ME Material Engineer
- ESHO Environmental, Safety, and Health Officer
4.0 References
- Specifications: Civil Specification clauses 100.4, 102.6, 102.7, and Sections 107 (Including Appendix A) and 541.1
Specification Vol. 3 – Section 9 – Part a, clause 141.
4.2 Drawings: Vol 2 – Section 8 – Part A – General and Topographic Survey
Vol 2 – Section 8 – Part B – Civil, Mechanical and NAVAIDS
(Note: See PGAD/745/1008/G/ 311 through 314, and 317; PGAD/745/1008/C/142)
- Materials
- Fencing Posts
- Mesh and Line Wires
- Stirrup Wires
- Straining Posts
- Fasteners
- Barbed Wire
- Warning tapes
- Temporary signs
- Traffic Cones
- Stakes
- Marking Paint
- Plant & Equipment
- Dozer & Grader
- Wheel Loaders
- Auger
- Trucks
- Excavators
6.6 Plate Compactors
- Light Towers
7.0 Safety
7.1 Prior to the commencement of any activities, the workforce will receive introductory training on the project specific, site safety requirements. This education will include both activity safety issues, as well as general safety requirements. Attendance to evidence this training will be recorded, and attendees will be required to sign in acknowledgement.
7.2 Where possible hazards may arise from fencing activities, the necessary safety measures will be taken to prevent accident or injury at all times. This may include barriers, warning tape/ net, signage, watchman, and proper lighting.
7.3 Where work near existing services may be required, the necessary work permits and safety equipments should be obtained prior to the activity commencement.
7.4 ESHO will enforce that Personal Protective Equipment be worn by site personnel at all times during construction activities. Supervisory Engineer and Foremen will be responsible for enforcement of the PPE policy.
7.5 Heat Stress Training will be provided.
7.6 Provisions of adequate cool drinking water, shade, and table salt will be in place.
7.7 Plant & Equipment will be provided back-up alarms, lights, and all other applicable safety devices.
7.8 All Plant and Equipment operators will be required to hold valid license compliant with local regulations.
7.9 Striking of any underground services will be avoided by the preliminary undertaking of trial trenches.
7.10 Accessing the Airside Operational Area will be controlled through the existing AOA gate No. 7 and by defining the limits of the construction activities and haul routes. Moreover, physical and identifiable boundary limits will be installed adjacent to facilities to be maintained, via barriers or fence as required by Operational Managers.
8.0 Prior Activities
- Permits and No Objection Certificates will be in place prior to start of fencing activities.
- The Surveyor will locate and mark all services that are present along the proposed fence alignment (This includes above ground services as well as buried services). These services (Electric, Telephone, Gas, Oil, Chemical, Water, etc) will be clearly marked using stakes and warning tapes. Near these services, only manual excavation is permitted.
- Location of fence to be installed, as well as limits of fence to be removed, will be clearly marked with stakes, tape, or bright paint. Proposed coordinate locations for fence alignment may be modified to accommodate protection and maintenance of existing utilities.
- Where necessary, ground along fence will be cleared and reasonably leveled along fence path prior to commencement of installation.
- All Submittals for Temporary and Interim Security Fencing to be submitted and approved prior to start of installation activities.
Prior to removal of any existing security fence, temporary or interim security fence will be installed at location approved by the Engineer, and in accordance with phasing plan; in order to maintain a secured perimeter at all times. During the initial stage of construction, access for installation will be from the Landside area, through designated Gate No 7, as allowed and monitored by the local Police Authorities. No entry into the Airside Operational Area will be made without prior arrangement and in accordance with procedures acceptable to DCA and the Police Authority.
- For AOA work, safety, security, and regulatory requirements as defined in Section 107 will be complied with.
- Procedure
- Installation of Temporary and Interim Security Fence
- Excavation for straining posts and intermediate posts will be performed by auger, to the proper depth and width indicated in the Contract Documents. Where post locations are near or adjacent to existing services, excavation will be by hand. Fence posts will be placed, along with its precast foundation, in the excavation and plumbed during placement. Posts will be re-checked for proper alignment and plumb during backfill and manual compaction to existing ground level.
- Concrete to be used for pre-casting of the fence post foundations will be grade 40/20/S, or as otherwise indicated in the Contract Documents.
- Fence will be erected to the lines and levels shown on the Drawings, or as instructed by the Engineer, in accordance with the manufacturer’s recommendations, and the requirements of BS 1722: Part 10.
- .Mesh and Line wires will be installed ensuring a smooth line at the top of the fence parallel to existing ground levels, with no discernible dips, humps or sudden changes in alignment.
- Line Wires will be tensioned tight by means of eye-bolt strainers or winders at each straining post.
- Straining posts will be provided at all ends and corners of the fence, at changes of direction and double straining posts will be provided at intervals not exceeding 30 meters on straight lengths of fence.
- Barbed Wire and Concertina coil will be secured at the top of posts to extension brackets, as well as along the bottom and secured to the ground with steel hooks at 10m centers.
- Galvanized steel braces to be installed at corner posts.
- Earthing of fence will be in accordance with BS 6651.
9.1.10 All AOA work will follow requirements included in Section 107.
- Removal of Security Fence
- Existing concertina tape and barbed wire will be carefully cut, removed, and stored to be hauled off-site for proper disposal.
- Line wire, ties, and mesh will be cut at specific locations in order to disconnect them from posts. After removal, material will be loaded into trucks and hauled off-site.
- Posts and concrete bases will be excavated, loaded into trucks, and hauled off-site.
- After removal of posts, holes will be backfilled to surrounding ground elevation.
- After completion of backfill, area will be left clean, tidied, and free of debris.
10.0 Responsibilities
- The CM will coordinate with ACM and ensure that the necessary resources to implement the approved method statement have been allocated to the task.
- The ACM along with the PE/SE will ensure that the site preparation activities are conducted according to the approved method statement.
- The ME will ensure that the materials being used are in accordance to the project specifications and the approved method statement.
The ESHO along with the PE/SE will ensure implementation of all ES&H procedures related to the nature of the works being carried out and in accordance with ES&H Plan.
