United Engineers (Singapore) Pte. Ltd. 257 Jalan Ahmad Ibrahim Singapore 629147 Tel: +6562660988 Fax: +6562686993

CONTENTS:

1. Scope of works 2. Project organization for Health & Safety Control3. Health & Safety Risk and Control4. Access / Egress5. Lighting6. Plant & Equipment7. Personnel Training Certificate8. Hazardous Materials & Substances9. Waste Management10. Special Control MeasuresAppendixes Appendix 1: Checklist for Lightning Protection SystemAppendix 2: Project Organization for Health & Safety controlAppendix 3: Risk AssessmentAppendix 4: Personnel Training Certificate

1. Scope of Works

Scope of Activities

This scope defines the minimum standards to be adopted when installing Lightning Protection System according to construction co-ordination drawings. A lightning protection system performs a simple task. It provides a specified path on which lightning can travel. When a building structure is equipped with a lightning protection system, the destructive power of the lightning strike is directed safely into the ground, leaving the structure and personal belongings unharmed.

Site ProcedureSite mobilization shall be done with real time monitoring the conditions & progress of builder works. Before commencement of the work, carry out examination of the physical condition of the area. Photographs should be taken where necessary, prior to commencement and during works.

Method StatementI. Preparation stagea. The principle components of a conventional structural lightning protection system are1. Air Termination Network2. Down Conductors3. Earth Termination Network4. Bondingb. Specification allows the use of 'natural conductors' such as rebars and structural steelwork, provided that they are electrically continuous and adequately earthed.c. Prior to install lightning protection system examine paths to ensure all areas free of debris that may interfere with the installation.d. Inventory all items immediately after unloading, using manufactures packing list.e. All the related material should be stored away from high traffic areas.

II. Installation Stagea. Site survey of the proposed Lightning Protection System based on approved CSD by foreman/sub-contractor together with Engineer.b. Installation must be carried out based on approved shop drawings & samples by foreman/ sub-contractor.c. Method and material used for the installation of Lightning protection system shall comply BS6651. (Protection of structure against lightning).d. The earth electrode pits location shall be marked out on site before commencement of hammering in electrodes. The earth pits shall be near the location of the down conductors.e. Those earth pits located in the basement shall be provided with seals to prevent penetration of the ground slab.f. Electrodes are hammered into the ground and reading is taken to ensure that the resistance is less than 10 ohms per electrode.g. Lightning Protection System accessories.

Earth rods Earth rod clampsEarth plates Inspection pits and Earth rod seals

Bonds and clampsEarth pointsand bossesEarth bars and disconnecting links

Static earthing kitsCompression connectors Compression toolsAccessories

h. Earth termination network: The means of dissipating the current to the general mass of earth. Choose an earth electrode to suit the ground conditions in the locality of the structure. Electrodes are available in the form of rods and plates (lattice or solid)

i. Earth rod clamps: Select a high copper content alloy earth rod clamp for the connection of the earthing conductor to the earth rod. In this below ground application, the clamp must ensure a good electrical contact and resist corrosion throughout the lifetime of the installation.

j. Earth inspection chambers: Select an earth inspection chamber to protect the earth electrode connections.

k. Bonding: Bonding is the most commonly employed method of avoiding the damaging effects of side flashing. All continuous metalwork should be considered for bonding. All metallic services, eg cable armouring, gas, water or steam piping, entering the building should also be bonded as directly as possible to the earth termination network.

Select the correct type of metalwork bond for the application, ie a flat column face, a circular rainwater pipe or a ribbed reinforcing bar

l. Depending on the specification, the down conductor tapes can be thermal weld to the rebar and casted in the column or run in a continuous strip on the surface of the external wall.

m. For casting of column, floor, continuous supervision is necessary to ensure that the tape is extended before the main builder close up form work before casting. Approved clamps to be used for extension tape.

n. Down conductor network: The down conductor system is the means of carrying the current of a lightning strike safely to the earth termination network.

o. Conductor fixings: Select the correct system of fixings for each part of the conductor system

p. Air termination network: The air termination network is the point of connection for a lightning strike. It typically consists of a meshed conductor arrangement covering the roof of the structure.

Use air terminals in the form of vertical air rods for the protection of prominent roof top features or equipment. Use strike pads to expose concealed conductors

q. Air terminal bases: Choose the correct air terminal base. This will ensure that the vertical air rods are both solidly fixed to the fabric of the structure and have a low resistance connection to the conductor network

r. Conductor jointing clamps: Select a component for the interconnection of multiple conductors or for changes of direction. Jointing clamps will ensure a low resistance, corrosion resistant connection.

s. Test clamps: In order to allow periodic disconnection and testing of the earth termination network, select a test clamp to be placed within the run of each down conductor.

t. After installation, Engineer- in-charge shall check the complete works and complete the inspection check list for Lightning Protection System installation works (See Annecure:1)u. Engineer-in-charge shall arrange and request for inspection with the Owners representative Residential Technical Officer (RTO) using approved Main con Request for Inspection (RIN) form.

III. Preferred Materials

Lightning Protection SystemFurse, Emtech and Heng

2. Project organization for Health & Safety Control(See annex. 3)3. Health & Safety risks and controls(Please refer to attach Risk assessment in respect to above scope of works Annex.4)

4. Acess / EgressProper step ladders shall be provided for access and egress into Distribution board as applicable.

5. LightingAdequate temporary/task lighting shall be provided if work to be carried at night or at dark places.

6. Plant & Equipment

S/NDescriptionUnit

1Center punch1 lot

2Brace1 lot

3Hammer1 lot

4Electrical drill (only for surface installation works)1 lot

5Diagonal-Cutting Pliers1 lot

6Wire Stripper/Cutter with Spring1 lot

7Side-Cutting Pliers1 lot

8Level1lot

9Shank Screwdriver1 lot

10P.P.E. Personal Protective Equipment (safety helmet, Boots, gloves & safety vest )1 set per worker

*The above machinery & Equipment used quantity will be varied depending on site conditions and production rate.

7. Personnel Training Certificate(Annexure 4)

8. Waste managementThe Rubbish which would be created from our scope of works will be disposed to the designated dumping ground.

9. Special Control measuresThe following general control measures against Safety, Environment and Quality shall be required for our scope of work and special control measures are not applicable for us

Proper PPE must be worn at all time Permit to work at height > 2m where applicable Lifting operation permit (using crane) where applicable. Confined space permit where applicable. Approved work method statement and risk assessment will be made available to site. All workers doing the work shall be briefed on this method statement and risk assessment.

Appendix

ANNEX 1:

Checklistfor Light Protection System Installation

ANNEX 2:Project Organizationfor Health & SafetyControl

ANNEX 3:Risk Assessment

ANNEX 4:Personnel Training Certificate