SPECIFICATION TABLE OF CONTENTS 1.0 GENERAL 1.1 GENERAL INFORMATION 1.1.1 Preamble 1.1.2 Abbreviations 1.1.3 Datum 1.1.4 Right of Way 1.1.5 Geotechnical Information 1.1.6 Interpretation of Drawings 1.1.7 Responsibility of Contractor 1.1.8 Governing Standards 1.1.9 Groundwater levels in Dubai
1.2 SITE OFFICE FOR ENGINEERS REPRESENTATIVE 1.2.1 General
1.2.2 Specific Requirements
1.2.3 Location of Contract Offices sand Other Contract Facilities 1.2.4 Service Authorities
1.3 GENERAL REQUIREMENTS 1.3.1 Materials
1.3.2 Setting-Out the Work 1.3.3 Notice of Operation 1.3.4 Traffic Safety and Control 1.3.5 Access to Private Land
1.3.6 Roads and Site to be Kept Clean 1.3.7 Compensation for Damage to Property 1.3.8 Existing Services
1.3.9 Continuous Working
1.3.10 Temporary Staging for Structures 1.3.11 Water Supply
1.3.12 Filling in Holes and Trenches 1.3.13 Protection of Works from Weather 1.3.14 Keeping the Works Free from Water 1.3.15 Sign Boards
1.3.16 Templates
1.3.17 Assistance to the Engineer 1.3.18 Surveying Equipment
1.3.18.1 Expendable Materials 1.3.19 Laboratory (See Appendix , Part 3 of 3)
1.3.19.1 General 1.3.20 Minimum Test Requirements 1.3.21 Sources of Materials
1.3.22 Programming the Progress of the Works 1.3.23 Progress Reports
1.3.24 Progress Photographs
1.3.26 Suppression of Noise 1.3.27 Closing of Roads
1.3.28 NOC from Relevant Authorities 2.0 EARTHWORKS
2.1 CLEARING AND GRUBBING
2.2 REMOVAL OF STRUCTURES AND OBSTRUCTIONS 2.2.1 General
2.2.2 Removal of Pipes 2.3 STRUCTURAL EXCAVATION
2.3.1 General
2.3.2 Pre-Construction and Land Drainage Records 2.3.3 Setting Out
2.3.4 Topsoil and Surfacing Materials 2.3.5 Land Drains
2.3.6 Hand Excavation 2.3.7 Support to Excavations 2.3.8 Dewatering 2.3.9 Formation
2.3.10 Excavation at or Near Roads 2.3.11 Excavation for Structures 2.3.12 Excavation for Pipelines 2.3.13 Excavation for Cable/Ducts 2.3.14 Excavated Material
2.3.15 Replacement of Unsuitable Material 2.3.16 Disposal of Material 2.3.17 Cofferdams 2.4 BACKFILLING EXCAVATIONS 2.4.1 General 2.4.2 Selected Backfill 2.4.3 Special Backfill 2.4.4 Filter Material
2.4.5 Structural and Non-Structural Filling 2.4.6 Backfilling of Trenches for Cables/Ducts
2.5 PROTECTION OF EXISTING SERVICES AND REINSTSATEMENT 2.5.1 General
2.5.2 Reinstatement of Unpaved Land 2.5.3 Reinstatement within Road Corridors 2.5.4 Reinstatement of Other Surfaced Areas
3.0 CONCRETE WORKS 3.1 GENERAL
3.2 MATERIALS 3.2.1 Cement
3.2.1.1 General
3.2.1.2 Ordinary Portland Cement 3.2.1.3 Sulphate Resisting Cement
3.2.1.4 Moderate Sulphate Resisting Cement 3.2.2 Fine Aggregate for Concrete and Mortar
3.2.3 Coarse Aggregate for Concrete 3.2.4 Combined Aggregate 3.2.5 Water
3.2.5.1 General
3.2.5.2 Specific Requirements 3.2.6 Admixtures
3.2.7 Concrete Mix Specification 3.2.8 Cement Mortar and Grout 3.3 MIXING AND TESTING
3.3.1 Samples of Aggregates 3.3.2 Trial Mixes for Concrete 3.3.3 Water/Cement Ratio 3.3.4 Measurement of Ingredients 3.3.5 Mixing Concrete 3.3.6 Re-Mixing Concrete 3.3.7 Concrete Testing 3.3.7.1 General 3.3.7.2 Preliminary Testing 3.3.7.3 Works Testing 3.3.7.4 Workability Testing
3.3.8 Frequency of Testing Aggregate and Concrete 3.4 TRANSPORTING AND PLACING CONCRETE
3.4.1 General Requirements 3.4.2 Placing Concrete in Hot Weather
3.4.3 Placing Concrete in Water (Tremie Concrete) 3.4.4 Blinding Concrete 3.5 COMPACTING CONCRETE 3.4.1 Tamping 3.4.2 Vibrating 3.6 CURING OF CONCRETE 3.7 JOINTS IN CONCRETE
3.7.1 Intervals During Concrete 3.7.2 Construction Joints 3.7.3 Jointing Fresh to Set Concrete
3.7.4 Expansion Joints 3.7.5 Expansion Joint Filler
3.7.6 Expansion Joint Sealing Compound
3.7.7 Waterstop Across Joints in Concrete Structures 3.8 INSPECTION OF CONCRETE
3.9 FAULTY CONCRETE WORK 3.10 REPAIRS TO CONCRETE
3.11 SUPERVISION OF CONCRETE WORK 3.12 FINISHING OF CONCRETE
3.13 DESIGN AND CONSTRUCTION OF FORMWORK
3.13.1 General
3.13.2 Spacing Blocks and Temporary Construction Ties 3.13.3 Slab Forms
3.13.4 Type of Formwork
3.13.4.1 Exposed Concrete Faces for Bridges 3.13.4.2 Sawn Formwork
3.13.5 Preparation of Formwork for Concreting 3.13.6 Approval of Formwork for Concreting 3.13.7 Removal of Formwork
3.13.8 Concrete Below Ground 3.14 READY MIXED CONCRETE
3.14.1 Compliance with Specification 3.14.2 Pumping Concrete 3.14.3 Field Control 3.14.4 Remixing 3.14.5 Documentation 3.15 REINFORCEMENT STEEL 3.15.1 General 3.15.2 Materials Specifications 3.15.3 Construction of Reinforcement 3.15.3.1 Placing Reinforcement 3.15.3.2 Maintaining Reinforcement in Position
3.15.3.3 Approval of Reinforcement Before Concreting 3.16 PRECAST CONCRETE KERBS, EDGINGS & QUADRANTS 3.17 IN-SITU CONCRTE EDGING
4.0 PIPES, PIPEWORK, MANHOLES AND CHAMBERS 4.1 PIPE MATERIALS
4.1.1 Pipe Classification and Pressure Ratings 4.1.2 Joint Requirements and Limitations
4.1.2.1 Flexible Joints 4.1.2.2 Flanged Joints 4.1.2.3 Flange Adaptors 4.1.2.4 Bolted Couplings 4.1.2.5 Nuts and Bolts
4.1.2.6 Shipping and Handling 4.1.3 Asbestos Cement Pipes and Fittings
4.1.4 Unplasticised Polyvinyl Chloride Pipes and Fittings (uPVC) 4.1.5 uPVC Pipes for land Drains
4.1.6 Glass Reinforced Pipes and Fittings GRP) 4.1.6.1 General
4.1.6.2 GRP Pipes and fittings for Pumping Stations and Valve Chambers
4.1.6.3 Factory Testing
4.1.6.4 Installation
4.1.7 Polyethylene Pipes (HDPE or HPPE) 4.1.7.1 General
4.1.7.2 Wall thickness 4.2 STORAGE AND HANDLING OF PIPES
4.2.1 General
4.2.2 Glass Reinforced Plastic Pipes (GRP) 4.2.3 Thermoplastic Pipes
4.3 GRANULAR MATERIAL FOR PIPE BEDDING 4.3.1 Stone for land Drains
4.3.2 Compaction Fraction Test
4.4 CONVENTIONAL (OPEN TRENCH) PIPELINE CONSTRUCTION
4.4.1 General
4.4.2 Nominal Trench Widths
4.4.2.1Pipeline in Wide Trenches 4.4.3 Pipe laying and Jointing
4.4.4 Pipelines in Concrete Cradles and Surrounds 4.4.5 Pipelines on Granular Beds
4.4.6 Placing Surrounds to Pipelines 4.4.6.1 Group A Pipe Materials 4.4.6.2 Group B Pipe Materials
4.4.6.3 Compaction of Pipe Surrounds
4.4.6.4 Pipelines Below Permanent Groundwater Level 4.4.7 Backfilling of Trenches – Pipelines/Structures
4.4.8 Deflection Measurements on Group B Pipelines
4.4.8.1 General
4.4.8.2 Deflection Measurements – GRP Pipes
4.4.8.3 Deflection Measurements – uPVC and other Plastic Pipes
4.4.9 Stanks to Pipelines in Granular Bedding
4.4.10 Thrust and Anchor Blocks to Pressure Pipelines
4.4.11 Pipes Protruding from Structures, Concrete Surrounds and Anchor Blocks
4.4.11.1 Group A Pipe Materials 4.4.11.2 Group B Pipe Materials
4.4.12 Protection of Pipelines and Pipeline Component 4.4.13 Indicator Posts to Pressure Mains
4.4.14 Enclosing Granular or Stone Surround with Geotextile Filter Fabric 4.4.15 Underground Services Warning Tapes
4.5 PIPEWORK WITHIN STRUCTURES
4.6 MANHOLES, CHAMBERS, AND SPECIAL STRUCTURES
4.6.1 General
4.6.2 Construction of Manholes, Chambers and Special Structures
4.6.2.1 Road Gullies
4.6.3 Access Covers, Frames, and Grates 4.6.3.1 General
4.6.3.2 Access Covers and Frames
4.6.3.3 Reinforced Plastic Sealing Plates to Access Covers 4.6.3.4 Road Gully Gratings and Frames
4.7 DUBAI MUNICIPALITY STANDARDS FOR COVERS AND GRATINGS 4.7.1 Approved List of Suppliers
5.0 BRICKWORK AND BLOCKWORK 5.1 MATERIALS
5.1.1 Concrete Bricks and Blocks
5.1.2 Bricks
5.1.3 Sand for Mortar 5.1.4 Lime for Mortar 5.2 CONSTRUCTION
5.2.1 General
5.2.2 Engineering Brickwork 5.2.3 Blockwork
5.2.4 Cement Mortar 5.2.5 Cement Lime Mortar 5.2.6 Cement Mortar Rendering
6.0 INSPECTION AND TESTING OF PIPELINES AND STRUCTURES 6.1 CLEANING AND INSPECTION OF PIPELINES
6.2 TESTING OF PIPELINES 6.2.1 General
6.2.2 Testing of Non-Pressure Pipelines 6.2.3 Testing of Pressure Pipelines 6.3 TESTING OF VALVES
9.0 CORROSION PROTECTION AND ODOUR CONTROL 9.1 MATERIALS
9.1.1 Corrosive Environments 9.1.2 Paint
9.1.3 Impervious Tanking Membrane 9.1.4 PVC Sheet Lining Material 9.1.5 Reinforced Plastic Liners 9.1.6 In-Situ Laminations 9.1.7 Epoxy Mortar
9.1.8 Bituminous Emulsions 9.1.9 Water Proof Paper
9.1.10 Protective Materials for Wrapping Pipeline Components Suppliers 9.1.11 Approved Paint Suppliers
9.2 INSTALLATION - PROTECTIVE COATINGS AND LINERS TO CONCRETE
9.2.1 General
9.2.2 Protective Coatings/PVC Liners 9.2.3 Reinforced Plastic Liners
9.2.4 Cutting and Sealing of Reinforced Liners 9.3 ODOUR CONTROL FACILITIES
9.3.1 General
9.3.2 Soil Moisture and pH probes
9.3.3 Activated Carbon Odour Control Filter 9.3.4 Natural Soil Odour Control Filter
9.3.4.1 Materials 9.3.4.2 Installation 9.3.4.3 Monitoring 9.3.4.4 Maintenance 9.3.4.5 Acceptance Test
10. BULIDING SPECIFICATIONS 10.1 CONCRETE
10.1.1 Tolerance
10.1.2 Concrete Finish 10.1.3 Construction Bays 10.1.4 Small Precast Items 10.1.5 Cast-in Fixings 10.1.6 Timber Cast-in Fixings 10.2 BRICKWORK AND BLOCKWORK 10.2.1 Damp-Proof Course
10.2.2 Wall Ties
10.2.3 Door and Window Frame Ties 10.2.4 Mastic
10.2.5 Brickwork and Mortar 10.2.6 Cement Mortar 10.2.7 Pointing 10.2.8 Hollow Walls 10.3 ROOFING 10.3.1 Roof Screed 10.3.2 Roof Primer 10.3.3 Waterproofing Membrane 10.3.4 Roof Insulation 10.3.5 Roof Surface 10.3.6 Roof Decking 10.3.7 Fascia Cladding 10.4 JOINERY 10.4.1 Timber-General 10.4.2 Timber-Sizes 10.4.3 Hardwood
10.4.4 Timber Fixing Accessories 10.4.5 Timber Preservative 10.4.6 Ironmongery 10.4.7 Workmanship 10.4.8 Storage 10.4.9 Door Frames 10.4.10 Doors 10.5 METALWORK 10.5.1 Aluminium 10.5.2 Aluminium Louvres 10.5.3 Aluminium Windows 10.5.4 Ironmongery 10.6 PLUMBING 10.6.1 Copper Tubes
10.6.3 UPVC Pressure Pipes and Fittings 10.6.4 Workmanship
10.6.5 Pipework
10.6.6 Copper Tube Fixing 10.6.7 Waste Pipes 10.6.8 Sleeves 10.6.9 Testing 10.6.10 Storage Tanks
10.7 PLASTERWORK & OTHER WALL, FLOOR & CEILING FINISHES
10.7.1 Cement 10.7.2 Lime 10.7.3 Sand 10.7.4 Gypsum Plasters 10.7.5 Plaster Trims 10.7.6 Metal Lathing 10.7.7 Plasticisers 10.7.8 Bonding Agents 10.7.9 Storage 10.7.10 Floor Tiles
10.7.11 Wall Tiles (Internal) 10.7.12 Wall Tiles (External) 10.7.13 Tile Adhesive 10.7.14 Tile Grout 10.7.15 Expansion Joints 10.7.16 Backgrounds 10.7.17 Dissimilar Materials 10.7.18 Hacking 10.7.19 Dubbing Out
10.7.20 Splatterdash or Stipple Coat 10.7.21 Internal Finishes – General 10.7.22 Internal Render 10.7.23 Stucco 10.7.24 External Render 10.8 GLAZING 10.8.1 Glass 10.8.2 Bedding Compound 10.9 PAINTING AND DECORATING 10.9.1 Painting-General 10.9.2 Exterior Stain 10.9.3 Workmanship 10.9.4 Stoppng to Plaster 10.9.5 Steel Priming 10.9.6 Oil-Based Paints 10.9.7 Internal Finish to Walls 10.9.8 Ironmongery
12.0 SAFETY PROCEDURES 12.1 GENERAL
12.2 FAMILIARISATION WITH SAFETY PROBLEMS 12.3 SAFETY OFFICER
12.4 SAFE WORKING CONDITIONS AT THE SITE 12.5 SAFETY EQUIPMENT 12.6 SAFETY PROCEDURES 12.6.1 General 12.6.2 Atmosphere Monitoring 12.6.3 Atmosphere Ventilation 12.6.4 Safety Harness
12.6.5 Emergency Breathing Apparatus 12.6.6 Active Confined Space Entry 12.6.7 Washing Facilities
12.6.8 Communication 12.6.9 Lighting 12.7 TRAFFIC CONTROL
16.0 MICRO TUNNELING AND PIPE JACKING 16.1 GENERAL
16.1.1 List of Approved Specialist Firms/Sub-Contractors 16.2 SURVEY CONTROL 16.2.1 General 16.2.2 Survey References 16.2.3 Structural Survey 16.2.4 Site Investigations 16.3 GEOTECHNICAL INSTRUMENTATION 16.3.1 Settlement Points 16.3.2 Settlement Anchors 16.3.3 Inclinometers (If required)
16.3.4 Groundwater Observation Wells 16.3.5 Optical Surveys 16.4 DEWATERING 16.4.1 Submittals 16.5 SITE INVESTIGATION 16.6 QUALITY CONTROL 16.7 EQUIPMENT 16.8 EXECUTION 16.9 TESTING 16.10 SAFETY
VOLUME 2 SPECFICATIONS
INDEX
PART 2 OF 3: MECHANICAL AND ELECTRICAL WORKS (NOT APPLICABLE)
SECTION 17 GENERAL, EELECTRICAL AND MECHANICAL SPECIFICATION
SECTION 18 ELECTRICAL SPECIFICATION SECTION 19 MECHANICAL SPECIFICATION
17.0 GENERAL, ELECTRICAL AND MECHANICAL SPECIFICATION 17.1 DRAWINGS AND INFORMATION REQUIRED FOR ELECTRICAL AND
MECHANICAL PLANT
17.2 DRAWINGS AND INFORMATION REQUIRED FOR ELECTRICAL AND MECHANICAL PLANT
17.2.1 At the start of the Contract 17.2.2 As Built Record Drawing 17.2.3 Prior to Delivery of Plant
17.2.4 Prior to the Issue of the Taking-Over Certificate 17.2.5 During the Maintenance Period
17.3 WORKMANSHIP AND DESIGN OF PLANT 17.4 LUBRICATION OF PLANT
17.5 INITIAL CHARGES OF OILS AND OTHER CONSUMABLES 17.6 SPARES
17.7 TOOLS AND LUBRICANTS
17.8 DELIVERY OF SPARES, TOOLS AND LUBRICANTS
17.9 PPROTECTION AND PACKING FOR SHIPMENT/STORAGE 17.10 AUTOMATIC CONTROL OF PLANT
17.11 INSTRUCTIONS AND TRAINING OF EMPLOYER’S STAFF 17.12 MAINTENANCE OF PLANT
17.13 RETURN TO SITE
17.14 OPERATING AND MAINTENANCE MANUALS 17.14.1 Introduction
17.14.2 General Requirements and Contents
17.15 WORKS TESTING AND INSPECTION OF MANUFACTURED ITEMS 17.16 TESTING AND CERTIFICATION OF MOTORS
17.17 SITE TESTING AND COMMISSIONING OF ELECTRICAL AND MECHANICAL PLANT
17.18 PLANT SUPPLIERS FOR THIS CONTRACT 17.19 CLIMATE
17.20 ELECTRICAL SUPPLY
17.21 DERATING DUE TO THE CLIMATIC CONDITIONS 17.22 TROPICALISATION
17.22.1 General 17.22.2 Metals
17.22.3 Screws, Nuts, Springs, Pivots etc 17.22.4 Wood
17.22.5 Electrical Insulating Materials 17.23 WORK IN DANGEROUS AREAS
17.24 CLASSIFICATION OF HAZARDOUS AREAS
17.25 HEALTH AND SAFETY AT WORK, ETC. ACT 1974 17.26 PROGRESS REPORTS
17.27 QUALITY ASSURANCE STANDARDS 17.28 ADAPTION OF EQUIPMENT
17.29 GUARANTEE 17.30 CO-ORDINATION
17.31 TESTING AND COMMISSIONING PROCEDURES AND DOCUMENTS 17.32 SITE RELIABILITY TRIALS
18.0 ELECTRICAL SPECIFICATION
18.1 HV AND LV FACTORY BUILT ASSEMBLIES (F.B.A’S) 18.1.1 Construction 18.1.2 Earthing Bars 18.1.3 Terminals 18.1.4 Busbars 18.1.5 Anti-Condensation Heaters 18.1.6 Indicating Lamps 18.1.7 Indicating Instruments 18.1.8 Motor Starter Isolation 18.1.9 Control Circuit Protection 18.1.10 Rotor Resistances 18.1.11 Socket Outlets 18.1.12 Metering 18.1.13 Labelling 18.1.14 Spares 18.1.15 Future Equipment
18.1.16 Standby Generator Connection 18.1.17 Weatherproof Switchboards 18.1.18 Panel Wiring
18.1.19 Thermal Overload Relays 18.2 CIRCUIT BREAKERS
18.2.1 H.V. Circuit Breakers 18.2.2 Air Break Circuit Breakers 18.2.3 General
18.3 EARTH LEAKAGE CIRCUIT BREAKERS AND SWITCH DISCONNECTORS
18.4 FUSE-SWITCHES AND FUSE-SWITCH DISCONNECTORS 18.5 FUSE
18.6 CURRENT TRANSFORMERS
18.7 INSTRUMENT VOLTAGE TRANSFORMERS 18.8 ISOLATING TRANSFORMERS
18.9 SELECTOR SWITCHES 18.10 EARTHING
18.12 MOTOR STARTERS 18.12.1 General 18.12.2 L.V. Starters 18.12.3 H.V. Starters
18.12.4 Slip Ring Rotor Resistance Motor Starters 18.12.4.1 General
18.12.4.2 Floor Standing Units 18.12.4.3 Panel Top Units 18.12.4.4 Integral Panel Units
18.13 MOULDED CASE CIRCUIT BREAKERS (M.C.C.B’S) 18.14 PUMP CONTROLS 18.15 TELEMETRY SYSTEM 18.16 BNATTERY UNITS 18.17 TRANSFORMERS 18.17.1 Standards 18.17.2 Windings 18.17.3 Construction 18.17.4 Fittings
18.18 INSTRUMENTS, INDICATORS AND TRANSMITTERS 18.18.1 General
18.18.2 Instrument Ranges 18.18.3 Field Mounted Instruments 18.18.4 Panel Mounted Instruments 18.18.5 Indicators
18.18.6 Digital Indicators 18.18.7 Integrators 18.18.8 Chart Recorders 18.18.9 Transmitters
18.19 FLOW MEASURING EQUIPMENT 18.19.1 Electro Magnetic Flow Meters 18.19.2 Ultrasonic In-Line Flow Meter
18.19.3 Ultrasonic Open Channel Flow Measuring Equipment 18.19.4 Installation of Ultrasonic Sensors
18.20 LEVEL MEASURING & CONTROL EQUIPMENT 18.20.1 Ultrasonic Level Measuring Equipment 18.20.2 Pressure Level Measuring Equipment 18.20.3 Float Level Control Equipment
18.21 GENERAL DESCRIPTION OF LIGHTING AND SMALL POWER INSTALLATIONS
18.21.1 Small Power Installations 18.21.2 Lighting Installations 18.21.3 Emergency Lights 18.22 PORTABLE PLANT
18.23 WIRING & CABLING ACCESSORIES 18.23.1 Wiring 18.23.2 Distribution Boards 18.23.3 Socket Outlets 18.23.4 Switches 18.23.5 Lighting Fittings 18.24 CABLES 18.24.1 General
18.24.2 PLYSW & PVC Oversheath Cables 18.24.3 PVC SWA PVC Cables
18.24.4 XLPE PVC SWA PVC Cables 18.24.5 PVC MICC Cables
18.25 CABLING METHODS 18.25.1 General
18.25.2 Conduit System and Associated Cables 18.25.3 Flexible Conduit
18.25.4 Cable Trunking and Associated Cables 18.25.5 Cable Tray
18.26 EARTHING
18.27 ELECTRICAL ACTUATORS
19.0 MECHANICAL SPECIFICATION 19.1 FINISH
19.2 MATERIALS 19.3 VALVES
19.3.1 General
19.3.2 Gate Valves for Sewage and Related Fluids 19.3.3 Air Valves 19.3.4 Flush Valves 19.3.5 Flap Valves 19.4 PUMPS 19.4.1 General Requirements 19.4.2 Submersible Pumps
19.5 PRESSURE AND COMPOUND GUAGE FOR SEWAGE & SLUDGE 19.6 CENTRIFUGAL FANS (AIR BLOWERS)
19.7 SUPPORTS AND FIXINGS 19.8 SETTING OF MACHINERY
19.9 SUPPORT OF PIPEWORK AND VALVES 19.10 PENSTOCKS
19.10.1 General
19.10.2 Austenitic Ni Resist Iron Penstocks 19.10.3 Stainless Steel Penstock
19.10.4 Plastic Penstock 19.10.5 Actuators 19.11 LIFTING EQUIPMENT
19.11.10. Electrically Operated Traversing Cranes 19.11.11. Manually Operated Lifting Equipment 19.11.12. Lifting Frames
20.0 MISCELLANEOUS ELECTRICAL AND MECHANICAL 20.1 METAL AND PLASTIC MATERIALS
20.1.1 Aluminium Alloy 20.1.2 Steel
20.1.3 Stainless Steel
20.1.4 Reinforced Thermosetting Plastic
20.2 METAL AND PLASTIC PREFABRICATED ITEMS 20.2.1 Ladders
20.2.2 Underground Hydrants and Covers 20.2.3 Open Mesh and Chequer Plate Flooring 20.2.4 Galvanised Steel Guardrailing
20.2.5 Aluminium Guardrailing 20.3 ODOUR CONTROL EQUIPMENT 20.3.1 Design Parameters
20.3.2 Description and Arrangement of Plant 20.3.2.1 General
20.3.2.2 Filter Media Housing 20.3.2.3 Filter Media 20.3.2.4 Extract Fans
20.3.2.5 Differential Pressure Switch 20.3.2.6 H2S Monitor 20.3.2.7 Ductwork 20.3.2.8 Filters 20.3.2.9 Flexible Joints 20.4 VENTILATION 20.4.1 General 20.4.2 Extract Fans
20.4.3 Wet Well Ventilation 20.4.4 Dry Well Ventilation 20.4.5 Fans
20.4.6 Fan Motors 20.4.7 Ducting
20.5 AIR CONDITIONING
20.5.1 Wall Mounted Air Conditioning Units 20.5.2 Centralised Air Conditioning Systems 20.5.3 Split Unit Air Conditioners
20.6 STANDBY DIESEL GENERATION PLANT 20.6.1 Application
20.6.2 General Description of the Plant 20.6.3 Engine - General
20.6.4 Engine - Lubrication 20.6.5 Engine - Fuel System 20.6.6 Engine - Cooling
20.6.7 Engine - Exhaust System 20.6.8 Engine - Speed Control 20.6.9 Engine - Starting 20.6.10 Engine - Panel
20.6.11 Engine - Safety Devices 20.6.12 Engine - Wiring 20.6.13 Alternator Output 20.6.14 Alternator Construction 20.6.15 Alternator – Terminals 20.6.16 Alternator – Insulation 20.6.17 Alternator – Heaters
20.6.18 Alternator – Waveform, Regulation and Radio Frequency Interference
20.6.19 Control Panel – Construction 20.6.20 Control Panel – Front Panel
20.6.21 Control Panel – Alarm Annunciator 20.6.22 Control Panels – General
20.6.23 Bulk Fuel Tanks 20.6.24 Transfer Pumps 20.6.25 Fuel System 20.6.26 Enclosure
20.7 FIRE ALARM & EXTINGUISHING SYSTEM 20.7.1 General
20.7.2 Manual Fire alarm Call Point 20.7.3 Optical Smoke Detector 20.7.4 Detector Base
20.7.5 Fire Alarm Panel
20.7.6 Fire Extinguishing Equipment 20.8 ACCESSORIES
20.9 GAS DETECTORS 20.9.1 General
20.9.2 Portable Gas Detector 20.10 SURGE
SECTION 1 GENERAL 1/1 1.1 GENERAL INFORMATION 1.1.1 Preamble
These Specifications shall be read in conjunction with the other documents of the Tender and Contract Documents and Drawings. The Contractor shall comply with all the provisions contained within these Documents. The Contractor shall take note of the Appendices contained in Part 3 of 3 of these Specifications. Where items in Part 1 of 3 of the Specifications are also covered in the Appendices the requirements of the Appendices shall take precedence.
Works shall also comply with Dubai Municipality “The Roads General Specification and DM Advisory Notes, Local and Administrative Order. Any clause in these Specifications which relates to work or materials not required by the Contract shall be deemed not to apply.
In order to avoid needless repetition of such phrases as "to the Engineer" and "by the Engineer" or "the Engineer's Representative" throughout these Specifications it shall be understood that when an order, instruction, decision, exercise of judgment or other similar act is indicated, such order, instruction, decision, exercise of judgment or other similar action will be issued, given, made or referred to the Engineer or the Engineer's Representative.
1.1.2 Abbreviations
In this Contract the following abbreviations have the meanings hereby assigned to them:
"AASHTO" means the specification issued by the American Association of State Highway and Transportation Officials.
"ACI" means the specification issued by the American Concrete Institute. "ASA" means the specification issued by the American Standard Association. "ASTM" means the specification by the American Society for Testing and
Materials.
"ANSI" means American National Standards Institute.
"BS" means the specification issued by the British Standards Institution. "BS. EN" means European Standards adopted as a British Standard. "CP" means the Code of Practice issued by the BS.
SECTION 1 GENERAL
1/2
"ISO" means International Standards Organisation.
"mm" means millimetre.
"cm" means centimetre.
"sq. cm, or cm2" means square centimetre. "lin. m" means linear metre.
"sq. m, or m2" means square metre. "cu. m, or m3" means cubic metre. "km" means kilometre.
"kg" means kilogrammes. "t" means tonne.
"gal" means U.S. gallon. "ml" means millilitre.
"l" means litre.
"U S G" means U.S. gauge. "No." means Number.
Where no units are quoted for a figure the relevant "System International" (SI) unit should be assumed.
1.1.3 Datum
The levels shown on the Drawings are referred to a series of bench-marks, located throughout the area of the project, and whose positions and values are shown on the Drawings. In the event of any such bench-mark having become obliterated, the Contractor shall make his own arrangements to ensure that the works are constructed to the levels shown on the Drawings or as amended by the Engineer, and if it is found necessary to cover or destroy any of such indicated bench-marks the Contractor shall transfer the level of such bench-marks to other approved fixed points, which shall then be surveyed and marked on the Drawings. The survey
SECTION 1 GENERAL
1/3
station details obtained by the Contractor from the Dubai Municipality Survey Section shall be at Contractor’s cost.
1.1.4 Right of Way
The Contractor shall make all the necessary arrangements for any land required for working areas outside the right of way, including payment when necessary, and the Employer does not accept any liability in connection with such land. This includes land for compounds, temporary roads, detours, diversions and stock piling materials.
1.1.5 Geotechnical Information
Any soils and materials test results and information provided for the Contractor with the Contract Documents at Tender stage are for his information only. The Contractor shall be deemed to have studied this information during the preparation of his Tender and to have carried out any further tests as he may consider necessary. Any Geotechnical information obtained by the Contractor after conducting any soils investigation either during the tender or construction period shall be sent to DM-DLCD No claims for additional payment will be considered from the Contractor on the grounds that the information is insufficient, incorrect, or misleading.
1.1.6 Interpretation of Drawings
The Employer and the Engineer accept no responsibility for any omissions from or for correctness of the representation of existing features on the Drawings.
1.1.7 Responsibility of Contractor
Where the approval of the Engineer is required under these Specifications such approval shall not relieve the Contractor of his duties, responsibilities or liabilities under the Contract.
1.1.8 Governing Standards
“Wherever in the specification” tests on completed works and construction control tests are called for or implied, they shall be carried out according to, and the materials shall comply with, the requirements of the specification (latest edition) with the priority of latest edition, of standards shall be as follows:
a. UAE and DM standards
b. International standards such as ISO c. National standards such as BSI and DIN
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d. Others as stated in this specification such as ASTM, etc
The Contractor shall provided for the exclusive use of the Engineer, copies of each and any code of practice, international standards etc. relevant to the works besides all manufacturer’s literature relating to all products to be used in the works, current BSI handbook No 3 and the manufacturer’s instructions for all relevant products, materials, components and installation.
1.1.9 Groundwater Levels in Dubai
The Contractor will be deemed to have carried out his own investigations at the time of Tender to ascertain for himself the nature of the soil conditions and in particular the groundwater levels that will be encountered.
Method statements for dealing with groundwater shall be submitted within three weeks of the signing of the Contract.
1.1.10 Pollution of Khor Dubai or Arabian Gulf
The Contractor shall ensure that no extraneous matter, rubbish or polluting liquid is deposited or discharged to the Khor Dubai (Creek) or to the foreshore or sea of the Arabian Gulf.
1.2 SITE OFFICE FOR ENGINEER'S REPRESENTATIVE 1.2.1 General
The Contractor shall provide, maintain and keep clean temporary site offices with all associated equipment and services for the exclusive use of the Engineer's Representative and his staff, from commencement until completion of the whole of the Works.
The temporary site offices shall be as-new prefabricated portable unit/s or alternatively of some other form of weatherproof design and construction to the approval of the Engineer. The building shall be erected on suitable solid foundation.
The offices shall have full partitions and room sizes shall be as shown in the Schedule of Offices. All rooms shall have individual entrance doors.
Corridor and entrance areas shall be additional to the office sizes.
The offices shall be air-conditioned with the exception of the Toilet, Shower and Kitchen areas.
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All rooms shall have glazed windows complete with fly screens and Venetian sun blinds.
Adequate fitted hardware, electrical switches, sockets, lighting, plumbing fittings, sanitary ware and fittings and fixtures, etc., shall be provided as necessary for the different areas.
The electrical installation shall provide for simultaneous use of all electrical appliances.
The electrical supply shall be 220-250 volts, 50 Hz. The Contractor may either arrange for a temporary power supply to the offices or alternatively provide and maintain adequate diesel generator sets. All electricity bills shall be paid by the Contractor.
The Contractor may either arrange for a temporary mains water supply or alternatively provide tankered water supply. All water bills shall be paid by the Contractor.
A minimum of two telephone lines with extensions shall be provided for the offices along with a third line for an independent telefax facility as shown in the Schedule of Fittings in Appendix C and the Contractor shall pay all installation and rental charges, and call charges, if any, for UAE calls only.
Covered car parking areas of approved construction for five (5) cars shall be provided adjacent to the offices.
The Contractor shall submit any necessary drawings and calculations for the construction of the offices for the Engineer's approval before commencing construction and shall be responsible for ensuring that the offices are structurally sound. The Engineer may request alterations at this stage. The drawings shall be approved in writing by the Engineer before installation/construction shall commence.
The offices shall be completed and all the equipment provided by the end of the Mobilisation Period.
The Contractor shall provide all items listed in the following Schedule of Offices and Schedule of Fittings. The Contractor shall obtain the Engineer’s approval for all furniture and equipment proposed.
1.2.2 Specific Requirements
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1. The Contractor shall be responsible for making all arrangements and payments in respects of any land required for the site of the building.
2. The Contractor shall be responsible for the security of the building and its contents at all times and shall employ watchmen for this purpose.
3. The Contractor shall supply the Consultant's staff with all safety clothing and equipment that shall be necessary for site working such as safety helmets, reflective waistcoats, etc.
4. The building shall be well constructed, burglar proof, mosquito proof and weatherproof and shall have sufficient doors and glass covered windows for proper light and ventilation. Floors shall be covered with suitable, approved flooring.
5. The Contractor shall retain on site for the exclusive use of the Engineer all codes and standards referred to in the Specification.
6. The building and services shall be available, fully maintained, until 1 month after the issue of the Taking Over Certificate for the whole of the Works. 7. Following the completion of the whole of the Works, the Contractor shall
remove the offices from the Site and reinstate the area to a natural condition or as directed by the Engineer.
8. The building and all equipment, materials, fittings, etc., shall become the property of the Contractor after the completion of the Works.
1.2.3 Location of Contract Offices and Other Contract Facilities
Within seven days of the date of the Letter of Acceptance issued by the Employer the Contractor shall submit a plan or plans showing his proposed locations for and details of:
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1/7 The Contractor's Site Offices.
The Contractor's Stores, Plant and Maintenance Yard, Concrete Batching and Materials Stockpiling Facilities.
Principal routes for heavy plant and lorries.
Areas for the temporary storage and permanent dumping of excavated material. The Offices of the Contractor's Project Manager will normally be adjacent to or
close to those of the Engineer for ease of communication.
The plan(s) shall be submitted to the Engineer in six (6) copies for approval. Any reasonable changes or modifications suggested by the Engineer shall be incorporated. All locations shall be subject to the approval of the Employer.
Departures from the approved details shall not be permitted unless written consent is obtained from the Engineer.
1.2.4 Service Authorities
Arrangements for mains water supply, mains electricity supply and telephone connections shall be made through:-
Dubai Electricity and Water Authority Water Division
Dubai Electricity and Water Authority Electricity Division
Etisalat Emirates Telecommunications Corporation (Dubai)
The Service Authorities shall be deemed to also include Departments and/or Sections of Dubai Municipality and any other public or private authority responsible for services.
1.3 GENERAL REQUIREMENTS
1.3.1 Materials
Materials delivered to the Site for the purpose of the Works, shall be accompanied by a "Certificate of Guarantee" signed by the authorised representative of the manufacturer, which will legally bind the manufacturer to the product delivered.
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Such Certification shall state that the materials specifications and test results are in compliance with the specified requirement of the pertinent designations of the most recent edition of ASTM, BS or any other approved equivalent National Standard unless otherwise directed.
Falsification of such Certificates, Materials, Specifications or Test Results shall be just cause for the rejection of the materials.
All products/materials shall have approved National Certificate of conformance similar to BSI Quality Kite Mark or National Agrement Certificate such as BBA for non-standard products and systems to be approved by the Engineer and verified by DM-Dubai Central Laboratory
1.3.2 Setting-Out the Work
The Contractor shall stake-out the work as to lines and grade in accordance with the Drawings and secure the approval of the Engineer's Representative before constructing the work. The Engineer's Representative will, if he deems it necessary revise the lines or grades and will require the Contractor to adjust and to stake-out accordingly. The Contractor shall give the Engineer's Representative not less than 24 hours notice of his intention to set out or give levels for any parts of the Works, in order that arrangements may be made for checking. The Contractor shall be responsible for obtaining any setting-out data he may require from Dubai Municipality Survey Section. The Contractor shall also be responsible for obtaining Dubai Municipality Survey Section’s approval on right-of-way. Any costs incurred in this shall be borne by the Contractor.
The Contractor shall, as a requirement of the Contract and without extra charge, provide all necessary instruments, appliances, surveyor personnel and labour, and any other material or staging, which the Engineer's Representative may require for checking the setting out or for any relevant work to be done. Any marks made by the Engineer's Representative or Contractor shall be carefully preserved and, if destroyed, shall be replaced by the Contractor at his own expense and to the approval of the Engineer. Work shall be suspended for the time necessary for checking the lines and levels on any part of the work, and shall proceed only after approval of measurements.
In the case of any variation from the approved works, the Contractor shall give the Engineer three copies of cross-sections and profiles of the graphical record or notes and computations of his stake-out as required by the Engineer. At his option he may submit cross-mark on one copy with his approval of the proposed lines of the
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work or his revisions thereof and return it to the Contractor. The Contractor shall resubmit for approval any cross-sections the Engineer may amend.
1.3.3 Notice of Operations
The Contractor shall, when required, supply in writing full information regarding the localities in which the materials are being obtained and in which the work is being prepared.
No permanent work shall be carried out without the consent in writing of the Engineer's Representative. Full and complete notice, in writing, shall be given 24 hours in advance of the time of the operation in order to make such arrangements as deemed necessary for inspection.
1.3.4 Traffic Safety and Control
1. The Contractor shall provide, erect and maintain such traffic signs, lamps barriers and traffic control signals as may be necessitated by the construction of the Works in accordance with Dubai Municipality and Dubai Traffic Police requirements. The Contractor shall submit proposals for dealing with such situations to the Engineer Dubai Municipality and Dubai Traffic Police for consent. Compliance with this Clause shall not relieve the Contractor of any of his other obligations and liabilities under the Contract.
2. The Contractor shall, after consultation with any statutory or other authority concerned, submit to the Engineer for his approval a programme based on such consultation showing the scheme of traffic management he proposes for carrying out the Works before commencing any work which affects the use of the public highway rights of way or parking areas and thereafter furnish such further details and information as necessitated by the Works or as the Engineer may require.
3. The Contractor shall not commence any work which affects the public highway until all traffic safety measures necessitated by the work are fully operational.
4. The traffic diversion and signs, lamps, barriers and traffic control signals shall be in accordance with the requirements of Dubai Municipality (also refer to Clause 11.5).
5. Traffic signs shall comply with the requirements of Dubai Municipality. The flashing rate for flashing lamps shall be within the range 120-150 flashes per minute. The minimum luminous intensity of the lamps shall be 0.5 candela
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for steady lamps, 1.0 candela for ripple lamps at their peak, and 1.5 candela for flashing lamps at their peak.
6. The Contractor shall keep clean and legible at all times all traffic signs, lamps, barriers and traffic control signals and he shall position, re-position, cover or remove them as necessitated by the progress of the Works.
7. Where road diversions roads are approved these must be maintained at frequencies to suit the traffic volume using them. A good running surface must be maintained and must at all times be free from ruts and potholes. 8. The Contractor’s attention is drawn to the fact that there are several bus stops
within the site boundary as shown on the key and detailed plans for both sewerage and drainage which must be retained and kept operational unless site works directly affect the bus stop.
9. In the event of any work affecting the bus stop, the Contractor shall liaise with DM/Public Transport (DM/PT) giving them at least two weeks notice of the following operations with start and end dates:-
a. In the event of any necessary redesign of existing bus stops, provide temporary alternative arrangements in consultation with DM/PT
b. In case of road diversion/closure provide temporary alternative arrangements in consultation with DM/PT and provide all necessary signing for both buses and pedestrians.
1.3.5 Access to Private Land
The Contractor shall give three weeks notice to the owner/occupier before entering private lands and the Contractor shall not enter on to those lands until given permission by the Engineer.
1.3.6 Roads and Site to be Kept Clean
The Contractor shall take great care and all reasonable precautions to ensure that roads and thoroughfares used by him either for the construction of the Works or for the transport of plant, labour and materials are kept clean during of such construction or transport and in the event of their requiring cleaning in the opinion of the Engineer the Contractor shall take all necessary and immediate steps to clean them.
On completion of dewatering the Contractor shall immediately dismantle and remove from the Site disused discharge pipes and dewatering points.
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Each individual site of work must be clean during the work and must be thoroughly cleaned up on completion.
1.3.7 Compensation for Damage to Property
The Contractor shall reinstate all properties whether public or private affected by the Works, Temporary Works, constructional plant, labour materials or transport to a condition at least equal to that existing before his first entry on to them.
If in the opinion of the Engineer the Contractor shall have failed to take reasonable and prompt action to discharge his obligations in the matter of site clearance or reinstatements the Engineer will inform the Contractor in writing of his opinion in which circumstances the Employer reserves the right to carry out the reinstatement himself or to arrange for it to be carried out by others or to make payments to the owners and occupiers in respect of such matters for which the Contractor is responsible. All such costs incurred and payments made will be deducted from any monies due or which shall become due from the Employer to the Contractor.
1.3.8 Existing Services
Drains, pipes, cables and similar existing services encountered in the course of the Works shall be guarded from injury or damage by the Contractor at his own cost so that they may continue to function uninterruptedly to the satisfaction of the owners thereof and the Contractor shall not store materials or otherwise occupy any part of the site in any manner likely to hinder the operations of such owners.
1. The Contractor shall protect and support, during the progress of the Works, all pipe mains, cable wires and other apparatus which might be endangered by his operations. The approximate positions and alignments of known services are indicated on the Drawings, but no guarantee of exact location can be given, and the Contractor must communicate with the authorities and/or proprietors concerned to locate them exactly, and he shall then prepare shop drawings 1/500 scale for each Utility as directed by the Engineer. When approaching each indicated position, the Contractor shall search, by safe methods which will not endanger the service, to determine its precise position.
2. The Contractor shall make his own arrangement with the owners of the services and with other persons interested, for any diversions, temporary
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stoppages and reinstatements, and he shall allow in his programme for all such arrangements.
3. If any underground service is encountered unexpectedly, excavation shall cease, and the Engineer's Representative shall be notified immediately. Emergency work, as necessary, should be put in hand without delay and without prejudice to the indemnity of the Employer.
4. The Contractor shall give notice, in writing, to the Engineer and to the appropriate service company of all damages to existing services caused by him or by any Sub-Contractor in the course of the Works. He shall be held responsible for any such damage and shall immediately have such damage made good at his own expense and shall relieve the Employer of all claims in respect of any loss or interruption involved.
5. If in the opinion of the Engineer, it is necessary or expedient that any pipe, drain, ditch, cable or overhead wire (including supports) should be broken out, stopped up, diverted, taken down, or altered, the cost of doing so shall be the responsibility of the Contractor. Such work shall be executed only on the written instruction of the Engineer.
6. All existing sewers, culverts, water courses and drains of every kind and condition that have been altered, extended or otherwise interfered with either directly or indirectly by the work, or that may by leakage, silting, stopping of free flow or otherwise interfere with or delay the execution of the work, shall be made good, cleaned, placed in working order, supported, maintained, and protected and the Contractor shall provide everything necessary for efficiently dealing with, protecting, pumping or removing, as the case may be, all water, sewage, or spoil therefrom.
1.3.9 Continuous Working
If in the opinion of the Engineer it is necessary for the safety of the Works or for any other reason, the Contractor shall, when so ordered, carry out the Works, or any portion thereof continuously by day and night. The Contractor will be reimbursed the agreed extra costs, provided the necessity for the order is not a result of the Contractor's negligence.
1.3.10 Temporary Staging for Structures
Temporary staging shall be provided by the Contractor to enable the construction operations to be performed in the required sequence. The staging shall be properly designed and constructed for the loads which it will be required to support, and
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complete details of the arrangements proposed shall be submitted to the Engineer for approval.
Such approval, however, will not relieve the Contractor of his responsibility for the adequacy of the staging. The cost of such staging is to be included in the tendered rates and prices entered in the Bills of Quantities.
1.3.11 Water Supply
The Contractor shall carry out an investigation prior to submitting his Tender as to the availability of water for the purpose of the Works and shall consult and arrange with the appropriate authorities and consider all legal aspects. The Contractor shall be entirely responsible for the supply of sufficient water of the specified quality at all times throughout the Contract, and the costs shall be deemed to be covered in the Contract rates and prices.
1.3.12 Filling in Holes and Trenches
The Contractor, immediately on completion of any part of the work, shall, at his own expense, fill up all holes and trenches which have been made or dug by him and are not part of the Works. Holes, cavities, trenches or depressions shall be backfilled with suitable materials and compacted to the grade required or as directed by the Engineer. The Contractor shall clear away all rubbish and materials that is no longer required for the execution of the work, whether his own or any other party to the satisfaction of the Engineer.
1.3.13 Protection of Works from Weather
The Contractor, at his own expense, shall protect all works and materials from injury by weather. All damage caused by adverse weather conditions, whether by flooding or intense heat or any other weather conditions, shall be rectified by the Contractor at his own expense. Abnormal weather conditions shall not be considered any reason for a claim by the Contractor for compensation for damage. 1.3.14 Keeping the Works Free from Water
The Contractor shall at his own expense keep the works at all times well drained and excavations whether above or below the normal water level of the water table free from storm or percolating water which may accumulate on the Site and which may interfere with progress of construction or has or is likely to have deleterious
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effect on the work in progress or the use thereof, by provision of temporary open drains and sub-soil drains, diversion of ditches and other surface water channel or by pumping or other means as required.
1.3.15 Sign Boards
The Contractor shall provide and erect signboards as detailed in the BOQ, at the Site and at the Offices of the Engineer and the Contractor. Normally signboards will be required on all major road approaches to the Site.
The layout and lettering size and location of all signboards and their siting shall be subject to the approval of Dubai Municipality.
The signboards shall give, in English and Arabic, the name of the Project and the names, Post Office Box numbers and contact telephone numbers of the Employer, the Engineer and the Contractor. The boards shall be of dimensions as shown on the drawings and shall be of durable construction capable of withstanding the effects of the climate for at least the period of the construction and the Defects Liability Period. The boards shall be mounted on substantial frames.
The signboards shall be periodically cleaned, remain legible and be maintained in a structurally safe condition throughout the period of construction and Defects Liability Period. Upon issue of the Defects Liability Certificate they shall be removed from the Site within two weeks.
1.3.16 Templates
When necessary the Contractor shall provide at his expense sufficient and approved templates for the purpose of controlling the finished shape of certain work. The templates will be in accordance with the Specifications and Drawings where such are provided.
All templates must be approved and shall be maintained in good order to provide the section required for the entire works. Templates may be checked from time to time and any deficiencies noted shall be rectified immediately.
The Contractor shall also supply straight edges and lines when required to control the work.
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1. The Contractor shall provide and maintain for the use of the Engineer such surveying and engineering instruments as the Engineer may require for his duties as detailed in (Clause 1.3.18). The Contractor shall provide the Engineer with all necessary assistance in checking the setting out of the Works and interpreting any information used by the Contractor for this purpose including the sole use of a minimum of three (3) chainmen.
2. The Contractor shall provide the Engineer with all assistance, equipment and material required to document and record progress of the Works.
3. The Contractor shall provide all assistance, equipment and material required by the Engineer for all the measurement of the Works for monthly valuation and for the final certificate payment.
4. The Contractor shall be responsible for all follow up and co-ordination with all the service departments. (Electricity, Water, Drainage, Street Lighting, Telephone, Horticultural, etc.).
5. The Contractor shall provide all unskilled labour and necessary tools as directed by the Engineer.
6. If at any time before the commencement or during the progress of the work it appears to the Contractor that for the proper execution of a specified part of the Works, shop drawings are necessary, these drawings shall be established by the Contractor and submitted to the Engineers' Representative for approval. The Engineer's Representative shall have authority to order at any time and the Contractor shall agree to provide any number of shop drawings which, in the opinion of the Engineer's Representative are necessary for the proper execution of a specified work. The Contractor shall not proceed with the above mentioned work until these shop drawings are approved by the Engineer's Representative. The Contractor shall not be entitled to any extra compensation or extension of time for the preparation of the above mentioned drawings. These details shall be dimensioned in the metric system and shall describe
accurately the method of fabrication, applied finish and sizes of all members and fixings and shall indicate methods of marking of components for site erection.
7. The Engineer shall furnish the Contractor AutoCad diskettes of the original drawings to be corrected as the Works proceed. The Contractor shall correct where required, prepare and supply the Engineer's Representative the updated transparencies and diskettes for his approval. The diskette copies shall be in
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Microstation DGN format of a standard and detail acceptable to the Dubai Municipality Drainage and Irrigation Department.
Such record Drawings produced by the Contractor shall include but not be limited to the following information:
- Offsets from permanent references such as road edge, road centreline, kerbline, building line, etc., at suitable intervals as directed by the Engineer, for all services encountered during the Works and during trial trenches including description of offsets..
- Level profiles for all sewerage, drainage, rising mains.
- House connection layout and details to be completed as separate drawings and included on main sewer layout drawings.
8. The Contractor shall not be entitled to any extra payment or extension of time for the preparation of the above mentioned record drawings.
The Contractor shall at the commencement of works, provide the Engineer's Representative for his full and exclusive use sufficient number of water, soil, concrete, asphalt, and room thermometers as required by the Engineer.
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1/17 1.3.18 Surveying Equipment
The equipment required on Site under this Contract shall be to the Engineer's approval and is as follows:
Table 1-1. Schedule of Equipment
Item Description No. Required
a. Rolling Straight Edge As required b. Electronic total station (TC 1600 or
equivalent with data recording facilities) 1 c. Target reflectors with 2 km range 3 d. Automatic level, tripod and staff
(NAK 2 or equivalent) 1
e. 2 metre ranging poles 10
f. 30 metre steel tape 2
g. 30 metre fibre tape 2
h. Manhole lifting keys for: heavy duty covers medium duty covers light duty covers
6 6 6 i. Weatherproof, rubber-cased torches 6 j. Survey arrows, wooden pegs, nails, etc. As required
k. Safety helmets As required
l. Marking chalk, paint As required
m. Copy of all standards referred to in the
Specification 1
n. Polaroid Camera 1
o. 5 metre steel tape 4
p. Hammer 1 kg 2
q. Hammer 3 kg 2
r. Level books, field books, surveying
umbrellas As required
s. Silica gel bags As required
t. Universal straight edge 3 metre with edge
gauge 1
u. 3 metre steel pocket tape graduated in mm 2 v. Aluminium spirit level 1 metre long with
four plumbs and two level tubes 1 w. Scientific electronic calculators Solar power As required
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The Contractor shall provide adequate supplies of expendable materials such as stationary, pencils, inks, drawing paper, pens, pegs, brushes, paint and other similar items required for the satisfactory completion of survey and as required by the Engineer's Representative.
1.3.19 Laboratory (see Appendix, Part 3 of 3) 1.3.19.1 General
Testing of all materials and completed works shall be carried out in accordance with DM Administrative Decision No. 160/2000.
1.3.20 Minimum Test Requirements
The following is the schedule of minimum requirements governing tests of materials which shall be carried out during the execution of the Works. Should the Engineer's Representative deem it necessary to increase or reduce the number of the following mentioned tests, he shall issue his written instructions to the Contractor as and when required, following due consultation with the Employer.
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Table 1-2. Minimum Test Requirements of Materials
Materials Frequency Relevant Standard
Water for concrete
One test for each source and as directed by the Engineer thereafter.
BS 3148 Portland
Cement One bag of cement for quality testing shall be taken from each 1700 bags or fraction thereof for each source or manufacturer. The Engineer may in lieu of this accept a testing certificate. BS 12 - O.P.C BS 4027 - S.R.C BS 4550 Coarse Aggregate
One sample for quality for Concrete testing shall be taken from each designated source. After approval one sample shall be taken for quality testing from each 1000 m3 when the material is in use. On each sample 2 sets of the required tests should be carried out except sieve analysis which shall be 3 in number.
BS 812
Fine
Aggregate As for Coarse Aggregate for concrete above BS 812 Bituminous
Materials
One sample of each type of material shall be taken for each source or delivery from the manufacturers. Subsequent testing shall be as directed by the Engineer but not less than one sample for each 500 drums (55gal) or equivalent.
BS 3195
Aggregates for Bituminous Mixtures
One sample for quality testing shall be taken from each designated source. After approval one sample shall be taken for quality testing from each 1000 m3 when the material is in use.
ASTM 04.03 BS 812
Mineral Filler for Bituminous Mixtures
One sample for quality testing from each 50 tonnes or fraction thereof.
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Table 1-2. Minimum Test Requirements of Materials (Cont’d)
Materials Frequency Relevant Standard
Bituminous Mixtures
i. One sample of each days production or each 200 tonnes laid or part thereof whichever is greater, shall be taken for quality testing.
The sample should be taken from the paving machine after approximately half of any one load has been laid or from the plant.
ii. One core sample for specific gravity testing shall be taken for each 300 lin. m of traffic lane or 2000 m2 or parts thereof for each completed layer of pavement.
BS 598 ASTM D 979 ASTM D 979 T230/T166 Subgrade and/or Embankment
A quality testing procedure (laboratory) for each subgrade material or embankment material shall be carried out for each 1500 m3 of material as follows:-
i. Granular Gradation.
ii. Atterberg Limits Liquid and Plastic Limits, Linear Shrinkage
iii. Compaction Test Modified Proctor with compaction curve to optimum moisture content and max. dry density.
iv. C.B.R. at 95% of Modified Proctor density.
After laying and compaction a quality testing procedure on each 1000m2 or part thereof should be carried out as follows:-
v. Field density
vi. Moisture content if directed by the Engineer the following tests may also be carried out on the material as laid on site. vii. Field C.B.R. with a speedy estimate for
moisture content and dry unit weight.
ASTM D 979 ASTM D 979 BS 1377 BS 1377 BS 1377 ASTM D 979 ASTM D 2216 ASTM D 4429
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Table 1-2. Minimum Test Requirements of Materials (Cont’d)
Materials Frequency Relevant Standard
Sub-bases and Aggregate Road
A quality testing procedure (laboratory) for each sub-base bases. or granular road base material shall be carried out for each source but not exceeding 1000 m3 of material as follows:
i. For every completed layer one field density shall be determined on each 500 m2
ii. Liquid Limit. iii. Plastic Limit. iv. Linear Shrinkage. v. Sand Equivalent.
vi. Compaction Test by Dry density moisture content relationship test method with compaction curve.
vii. CBR at 100% of the Dry density moisture content relationship test.
viii. After laying and compaction 3 Nos. field tests shall be followed for every 1000 m2 of each layer of sub-grade and sub-base layers and 2 Nos for every 1000 m2 for all other layers BS 1377 Part 2 BS 1377 Part 2 BS 1377 Part 2 BS 1377 BS 1377 Part 2 BS 1377 ASTM D1883 BS 1377 BS 1377 Part 2 Reinforcing Steel
Reinforcement steel shall be supplied to site with a manufacturer's test certificate for each load. Where directed testing on any sample of reinforcement for the following types may be required:-
i. Steel fabric reinforcement.
ii. Mild steel and high yield (hot rolled) bars.
iii. Cold worked steel bars.
Chemical Analysis of Steel for carbon content as directed by the Engineer
BS 4483 BS 4449 BS 4482
ASTM relevant standard.
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Table 1-2. Minimum Test Requirements of Materials (Cont’d)
Materials Frequency Relevant Standard
Concrete One set of at least 6 cubes (or 4 cylinders) shall be obtained from each 75 m3 or fraction thereof placed in each day or class of concrete.
Slump tests and compaction factor tests shall be carried-out at the site of the actual placing of concrete as directed by the Engineer.
Preparation of concrete specimens & curing of specimens
Minimum cement content of hardened concrete as directed by the Engineer.
BS 1881
BS 1881 ASTM C192 ASTM C1084
Precast Concrete Flexural/transverse strength and water absorption for each supplier of precast kerbs and slabs (2 no. samples). Sub-sequently, on approval of a source or supplier 2 samples will be tested every 2000 lin. m for kerbs and every 2000 m2 for slab tiles.
AASHTO T97 ASTM C78 BS 7263
1.3.21 Sources of Materials
The Contractor shall be responsible for obtaining the Approval of the local Authorities for the sources of materials and he shall have no right to claim for any compensation if he is to pay for the material at its source.
1.3.22 Programming the Progress of the Works
A detailed computer-based programme using critical path methods shall be produced by the Contractor as set out in the Conditions of Contract. This shall include full details of resources and rates of progress. The Engineer may require the Contractor to modify the programme on occasions during the course of the Contract. The Contractor shall work to the latest approved programme at all times.
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In planning his programme the Contractor shall allow reasonable time for the Engineer to confirm setting out details as the Works proceed in accordance with the programme.
The Contractor shall indicate on his programme whether the work is to be carried out during normal site hours or whether overtime or a shift system is necessary to execute the Works.
The Contractor shall present a weekly summary to the Engineer detailing personnel , plant materials and equipment orders and shipping movements of same.
Before the close of Site on each working day the Contractor shall submit a brief programme for the following working day stating in which area of the site work will be carried out and the location of plant and labour. The format of the programme shall be agreed with the Engineer. The Contractor shall also submit for the Engineer’s approval a daily record of manpower and plant resources.
1.3.23 Progress Reports
The Contractor shall be required to submit to the Engineer weekly and monthly progress reports on the first day of the week following and the first day of the month following respectively.
Weekly Report
The report shall include: the meteorological data; Contractor's plant and labour returns; a brief summary of work completed.
Monthly Report
The report shall include: a description of the month's work; details of any problems relating to the Works; quantities; records of test results; charts illustrating progress in terms of work done against programmed work and the financial status of the Contract including value of works completed, certified and monies received; progress photographs.
1.3.24 Progress Photographs
The Contractor shall arrange to take monthly record photographs of the Works in progress. These photographs shall cover such extent of the Works as the Engineer shall direct. The days upon which the photographs are to be taken shall be decided by the Engineer.
SECTION 1 GENERAL
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The Contractor shall provide the Engineer on the last day of each month one set of progress photographs, with dates imprinted on it, which shall comprise the following:
- One colour negative of each photograph for an anticipated maximum of fifty exposures per month.
- Ten colour prints (294 x 210 mm) of each of a maximum of twenty of the negatives as selected by the Engineer.
The prints are to be processed by an approved professional and shall be in colour on heavy weight paper with matt finish. The photographs shall have computer produced descriptions incorporated thereon. Each photograph shall be provided with an approved clear plastic cover for binding.
The copyright of all photographs shall be vested in the Employer and the negatives and prints shall be delivered to the Engineer within 4 days of exposure.
1.3.25 Flows in Pipelines and at Pumping Stations
During the execution of the Works the Contractor shall maintain flows in pipelines and at pumping stations or alternatively provide adequate means of diverting the flows or overpumping of the flows to the satisfaction of the Engineer.
The Contractor should note that the Employer may decide to carry out overpumping utilising his own plant and resources and the Contractor shall make due allowance for the necessary coordination with the Employer with respect to the Contract programme. Such arrangements will not relieve the Contractor of his obligations for the maintenance of flows and the safety of the Works, personnel and the general public.
No claim for delay or additional work arising from this requirement will be considered by the Employer.
1.3.26 Suppression of Noise
The Contractor shall make every reasonable endeavour both by means of temporary works and by the use of appropriate plant or silencing devices to ensure that the level of noise resulting from the execution of the Works does not constitute a nuisance.
SECTION 1 GENERAL
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The Contractor shall give four weeks notice in writing to the Engineer of his intention to commence work on any public road (which shall include un-made rights-of-way).
The closure of public roads will not be permitted without the written permission of the Dubai Municipality Roads Department, the Dubai Traffic Police and the Engineer. The Contractor shall submit five (5) copies of his proposals for diverting traffic indicating positions of all signs, cones, lights and anything else which may be necessary. The Contractor shall comply with any Specification for traffic diversion, including surfacing requirements, safety and control laid down by the Authorities in Dubai and shall be responsible for continuous maintenance.
A period of up to 30 days may be required by the Dubai Municipality to process permits authorising the cutting of existing carriageways.
In the event of such permission being refused the Contractor shall have no claim for any additional payment.
No work will be permitted on a public road verge, central reservation or garden without the SIGNED approval of the respective Authorities copies of which must be submitted to the Engineer before work commences.
The Contractor’s work shall be so arranged that use of the roads affected by the work shall be restored to the public with the minimum of delay. Laying of the pipelines, backfilling, testing of the pipeline, temporary reinstatement and clearance of the Site shall follow closely behind excavation and the Engineer may limit the length of excavation when necessary.
1.3.28 NOC from Relevant Authorities
Not withstanding the requirements of clause 48 of "Conditions of Contract for Works of Civil Engineering Construction, (Part 1 - General Conditions)" it shall be the Contractor's responsibility to obtain all required No Objection Certificates (NOC) from the relevant Authorities and submit them to the Engineer prior to the Engineer issuing a Taking Over Certificate.
SECTION 1 GENERAL
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All materials and equipment specified in the Contract documents which are to be incorporated in the works must be obtained from or through a Dubai Emirate supplier and or manufacturer who must be registered and licensed by the Dubai Municipality. If such specified material or equipment is not available from the Dubai Emirate market then any other source is acceptable.
