-
WAM
Client: FEDERAL ELECTRICITY AND WATER AUTHORITY (FEWA) Project:
STANDARD SPECIFICATIONS FOR WATER WORKS
Engineer: WATER DIRECTORATE - ASSET MANAGEMENT DEPARTMENT
Title: Technical Terms / Chapter-4 / Engineering Specifications
/ Civil Engineering Works Specification
CS01-GENERAL REQUIREMENTS
Office:
DUBAI Order: Document: MWA_PRO_07/WAM-04-CS01 Rev: OCT/2014
Sheet:
1 of: 17
Federal Electricity & Water Authority
CS - CIVIL ENGINEERING WORKS SPECIFICATIONS
SPECIFICATIONS FOR WATER TANKS, BUILDINGS AND EXTERNAL WORKS
GENERAL INDEX
CS-01 GENERAL REQUIREMENTS
CS-02 TOPOGRAPHICAL SURVEY
CS-03 SOIL INVESTIGATIONS
CS-04 DEWATERING
CS-05 EARTHWORK
CS-06 GENERAL REQUIREMENTS FOR CIVIL/STRUCTURAL WORKS.
CS-07 CONCRETE AND REINFORCEMENTS
CS-08 CONCRETE WATER STORAGE TANKS
CS-09 STRUCTURAL STEEL/ CLADDING WORKS
CS-10 PILING WORKS
CS-11 PAINTING / GLAZING / TILING
CS-12 MASONRY / PLASTERING / SCREED
CS-13 JOINERY / METAL WORKS
CS-14 SUSPENDED CEILING / PARTITIONS
CS-15 DRAINAGE WORKS
CS-16 ROADS / PAVEMENTS / EXTERNAL WORKS
CS-17 WATER PIPELINE WORKS
CS-18 WATER PROOFING AND INSULATION
CS-19 SANITARY / KITCHEN INSTALLATION S
CS-20 FINISHES / DOOR / WINDOW / FURNITURE SCHEDULES
CS-21 DIRECTIONAL DRILLING
CS-22 FENCING WORKS
CS-23 PRE STRESSED CONCRETE WATER TANK
CS-24 MISCELLANEOUS WORKS
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WAM
Client: FEDERAL ELECTRICITY AND WATER AUTHORITY (FEWA) Project:
STANDARD SPECIFICATIONS FOR WATER WORKS
Engineer WATER DIRECTORATE - ASSET MANAGEMENT DEPARTMENT
Title: Technical Terms / Chapter-4 / Engineering Specifications
/ Civil Engineering Works Specification
CS01-GENERAL REQUIREMENTS
Office: DUBAI Order: Document:
MWA_PRO_07/WAM-04-CS01 Rev: OCT/2014 sheet: 2 of: 17
Water Directorate
Asset Management Department
STANDARD SPECIFICATIONS
FOR WATER WORKS
TECHNICAL TERMS
Chapter – 4
Engineering Specifications
[C-Civil Engineering Works Specifications]
CS01-General Requirements
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WAM
Client: FEDERAL ELECTRICITY AND WATER AUTHORITY (FEWA) Project:
STANDARD SPECIFICATIONS FOR WATER WORKS
Engineer WATER DIRECTORATE - ASSET MANAGEMENT DEPARTMENT
Title: Technical Terms / Chapter-4 / Engineering Specifications
/ Civil Engineering Works Specification
CS01-GENERAL REQUIREMENTS
Office: DUBAI Order: Document:
MWA_PRO_07/WAM-04-CS01 Rev: OCT/2014 sheet: 3 of: 17
CS01-GENERAL REQUIREMENTS TABLE OF CONTENT 1. CODES AND
STANDARDS
1.1 Subsoil Investigations/Excavations/Earthworks 1.2 Concrete
Works 1.3 Structural Steelwork 1.4 Painting Works 1.5 Pavements
Works 1.6 Miscellaneous Works
2. DESIGN CRITERIA 2.1 Architectural Design 2.2 Structural
Design 2.3 Setting out and Construction Tolerances
3. MATERIALS / SUPPLIERS/ MANUFACTURERS 4. SOIL INVESTIGATIONS
5. SITE SURVEY 6. SITE PREPARATION, REQUIREMENTS AND PROJECT
LEVELS
6.1 Safety 6.2 Fire Protection 6.3 Work Protection 6.4
Maintenance of Traffic Flows, Temporary Diversions 6.5 Existing
Services Protection
6. 6 Scaffolding 7. SITE INSTALLATIONS 8. NOTICE OF OPERATIONS
9. PERMIT TO WORK 10. SIGN BOARDS 11. EARTHWORKS 11.1 Clearing and
Grubbing
11.2 Excavations Generally 11.2.1 Open-Cut Excavation 11.2.2
Excavated Materials 11.2.3 Bottom Level of Excavation 11.2.4
Backfilling of Trenches 11.3 Dewatering 11.4 Filling &
Reinstatement 11.5 Slips & Settlements 11.6 Compaction and Fill
Areas 11.7 Stockpiles and Disposal 11.8 Field Test
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WAM
Client: FEDERAL ELECTRICITY AND WATER AUTHORITY (FEWA) Project:
STANDARD SPECIFICATIONS FOR WATER WORKS
Engineer WATER DIRECTORATE - ASSET MANAGEMENT DEPARTMENT
Title: Technical Terms / Chapter-4 / Engineering Specifications
/ Civil Engineering Works Specification
CS01-GENERAL REQUIREMENTS
Office: DUBAI Order: Document:
MWA_PRO_07/WAM-04-CS01 Rev: OCT/2014 sheet: 4 of: 17
CS01-GENERAL REQUIREMENTS
1. CODES AND STANDARDS
Unless specifically mentioned hereafter, any work or supply of
material shall be subjected to the compliance of internationally
recognized Standards or Codes, such as BSI, ASTM, DIN or approved
equivalent. The Specifications of the CIRIA Guide to concrete
construction in the Gulf/GCC region are also applicable. Some Codes
and Standards to be followed by Contractor for certain Works are as
shown below: 1.1 Subsoil Investigations/Excavations/Earthworks
BS 5930 Code of Practice for Site Investigations BS 1377 Methods
of Tests for Soils for Civil Engineering Purposes
1.2 Concrete Works
BS EN 197 – 1, 2011 specifications and conformity criteria for
common cements BS 812 Methods for Sampling and Testing of Mineral
Aggregates, Sands and Fillers. BS EN 12620:2002+A1:2008 Aggregates
for concrete BS 1199/1200 Building Sands from Natural Sources. BS
1881 Methods of Testing Concrete. BS EN 1008:2002 Mixing water for
concrete. BS 3712 Building and Construction Sealants. BS 4027- 1996
Specification for Sulphate Resisting Portland cement. BS 4449
Specification for Hot-Rolled Steel Bars for the Reinforcement of
Concrete. BS 4482 Steel Wire for the Reinforcement of Concrete. BS
4483 Steel Fabric for the Reinforcement of Concrete. BS 4550
Methods of Testing Cement. BS 4551 Method of Testing Mortar BS EN
934-2:2009 Admixtures for concrete, mortar and grout. BS EN
1992-1-1:2004 Euro code 2. Design of concrete structures. General
rules and rules
for buildings BS 8204-2:2003+A2:2011 Screeds, bases and in situ
floorings. Concrete wearing surfaces.
Code of practice BS EN ISO 3766:2003 Construction drawings.
Simplified representation of concrete
reinforcement 1.3 Structural Steelwork
BS 4-1:2005 Structural steel sections. Specification for
hot-rolled sections BS EN 13414-1:2003+A2:2008 Steel wire rope
slings. Safety. Slings for general lifting
service BS EN 13000:2010 Cranes. Mobile cranes BS EN
13157:2004+A1:2009 Cranes. Safety. Hand powered cranes BS EN
1011-2:2001 Welding. Recommendations for welding of metallic
materials. Arc
welding of ferritic steels BS 5395-4:2011 Code of practice for
the design of stairs for limited access BS 5950-2:2001 Structural
use of steelwork in building. Specification for materials,
fabrication and erection. Rolled and welded sections
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WAM
Client: FEDERAL ELECTRICITY AND WATER AUTHORITY (FEWA) Project:
STANDARD SPECIFICATIONS FOR WATER WORKS
Engineer WATER DIRECTORATE - ASSET MANAGEMENT DEPARTMENT
Title: Technical Terms / Chapter-4 / Engineering Specifications
/ Civil Engineering Works Specification
CS01-GENERAL REQUIREMENTS
Office: DUBAI Order: Document:
MWA_PRO_07/WAM-04-CS01 Rev: OCT/2014 sheet: 5 of: 17
BS EN ISO 8501-1:2007 Preparation of steel substrates before
application of paints and related products. Visual assessment of
surface cleanliness. Rust grades and preparation grades of uncoated
steel substrates and of steel substrates after overall removal of
previous coatings
BS 7668:2004 Weldable structural steels. Hot finished structural
hollow sections in weather resistant steels. Specification
ISO 15792-3 2000 Welding consumables - Test methods.
Classification testing of positional capacity and root penetration
of welding consumables in a fillet weld
BS EN 288 Approval Testing of Welding Procedures - Fusion
Welding of Steel. BS EN 10025 Hot Rolled Products of Non-alloy
Structural Steel. BS EN 13246 Specification for Tensional Steel
Strapping. BS EN 13394 Specification for Non-Metallic Tensional
Strapping. BS EN 10029:2010 Hot-rolled steel plates 3 mm thick or
above. Tolerances on dimensions
and shape BS EN ISO 12944-5:2007 Paints and varnishes. Corrosion
protection of steel structures by
protective paint systems. Protective paint systems BS EN ISO
1461:2009 Hot dip galvanized coatings on fabricated iron and steel
articles.
Specifications and test methods 1.4 Painting Works
BS 4800:2011 Schedule of paint colours for building purposes BS
6150:2006 Painting of buildings. Code of practice BS 6949:1991
Specification for bitumen-based coatings for cold application
excluding use in
contact with potable water BS 7079 Preparation of Steel
Substrates before Application of Paints and Related Products. BS
7664 Specification for Undercoat and Finishing Paints. BS
8202-1:1995 Coatings for fire protection of building elements. Code
of practice for the
selection and installation of sprayed mineral coatings BS EN ISO
2064:2000 Metallic and other inorganic coatings. Definitions and
conventions
concerning the measurement of thickness BS EN ISO 12944 Code of
Practice for Protective Coating of Iron & Steel Structures
against
corrosion. 1.5 Pavements Works
BS EN 1340:2003 Concrete kerb units. Requirements and test
methods BS 7533 Precast Concrete Paving Blocks.
1.6 Miscellaneous Works
BS 476 Fire Tests on Building Materials and Structures. BS
8215:1991 Code of practice for design and installation of
damp-proof courses in
masonry construction PD 6512-3:1987 Use of elements of
structural fire protection with particular reference to the
recommendations given in BS 5588 'Fire precautions in the design
and construction of buildings'. Guide to the fire performance of
glass
2. DESIGN CRITERIA
The Contractor shall be responsible for the design, construction
and maintenance of the whole of the civil works related to the
water storage tanks, pumping stations, pipelines, ancillary
structures, roads and other external works. The works also include
interface connections with the FEWA’s existing pipelines and tanks
wherever mentioned. Designs and details shall fully meet the
technical and operational requirements of the mechanical and
electrical installations. All designs
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WAM
Client: FEDERAL ELECTRICITY AND WATER AUTHORITY (FEWA) Project:
STANDARD SPECIFICATIONS FOR WATER WORKS
Engineer WATER DIRECTORATE - ASSET MANAGEMENT DEPARTMENT
Title: Technical Terms / Chapter-4 / Engineering Specifications
/ Civil Engineering Works Specification
CS01-GENERAL REQUIREMENTS
Office: DUBAI Order: Document:
MWA_PRO_07/WAM-04-CS01 Rev: OCT/2014 sheet: 6 of: 17
and details must be prepared to comply with the best Engineering
practice, the appropriate Standards and Codes of Practice and the
requirements of this Specification. No departures from the approved
Standards and Specification shall be allowed without the approval
of FEWA.The Specification gives the minimum acceptable Standards
for the design, workmanship and materials with which the Contractor
shall comply. The drawings supplied with the Tender documents are
only for guidance and indicate the minimum requirements to be
provided by the Contractor. The Contract price shall include the
cost of any enlarged structures or modified layout required to meet
FEWA's design parameters. Failure of FEWA to comment on the
drawings submitted by the Contractor during the construction stage,
which show modified arrangements not complying with the
Specification, drawings or the design parameters, shall not be
accepted as approval of such arrangements. 2.1 Architectural Design
The design of the whole work shall be in accordance with the best
standards of modern industrial practice. Finishing materials shall
be selected so as to match each other and to present ample
guarantees of durability. Samples shall be submitted for the FEWA’s
approval, as well as selection of colours and textures. The
structures as a whole with external works shall give a good
aesthetic effect from every angle of look. The perspective drawings
with 3D effect shall be prepared by the contractor as required by
the Authority. 2.2 Structural Design 2.2 .1 Calculation methods
Designs shall be carried out in accordance with accepted FEWA
principles and shall meet the requirements of the applicable
Standards and Codes of Practice. Any static and dynamic calculation
is to be submitted for the FEWA’s approval. When the Contractor
uses computerised calculation methods for special kinds of
structure, he shall provide a full explanation of such method,
should FEWA require it, together with adequate documentation and
reference. Structural analysis shall be done with the latest
software programmes with new technique and presentation. 2.2. .2
Standards and Codes ( To include all latest amendments)
BS 4449:2005+A2:2009 Steel for the reinforcement of concrete.
Weldable reinforcing steel. Bar, coil and decoiled product.
BS ISO 14654:1999 Epoxy-coated steel for the reinforcement of
concrete
BS 4483 Specification for steel fabric for reinforcement of
concrete
BS 449 The use of structural steel in buildings
BS 2853 The design and testing of steel overhead runway
beams
BS 9991:2011 Fire safety in the design, management and use of
residential buildings. Code of practice
BS 6262-3:2005 Glazing for buildings. Code of practice for fire,
security and wind loading
BS EN 1886:2007 Ventilation for buildings. Air handling units.
Mechanical performance
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WAM
Client: FEDERAL ELECTRICITY AND WATER AUTHORITY (FEWA) Project:
STANDARD SPECIFICATIONS FOR WATER WORKS
Engineer WATER DIRECTORATE - ASSET MANAGEMENT DEPARTMENT
Title: Technical Terms / Chapter-4 / Engineering Specifications
/ Civil Engineering Works Specification
CS01-GENERAL REQUIREMENTS
Office: DUBAI Order: Document:
MWA_PRO_07/WAM-04-CS01 Rev: OCT/2014 sheet: 7 of: 17
BS 5821-3:1984, ISO 717-3:1982 Methods for rating the sound
insulation in buildings and of building elements.
BS 5950-2:2001 Structural use of steelwork in building.
Specification for materials, fabrication and erection. Rolled and
welded sections
BS 6180 Code of Practice for protective barriers in and about
buildings
BS 6399 Code of Practice for dead and imposed loads
BS 8103 Foundations
BS 8007 The structural use of concrete for retaining aqueous
liquids
BS EN 1992-1-1:2004 Eurocode 2. Design of concrete structures.
General rules and rules for buildings
BS EN 1991-1-4:2005+A1:2010 Eurocode 1. Actions on structures.
General actions. Wind actions
C.P. 118 The structural use of aluminium
BS 7533-12:2006 Pavements constructed with clay, natural stone
or concrete pavers. Guide to the structural design of trafficked
pavements constructed on a bound base using concrete paving flags
and natural stone slabs.( Road A guide to the structural design of
pavements Note 29 for new roads).
UNIFIED FACILITIES CRITERIA (UFC) SEISMIC DESIGN FOR
BUILDINGS
2.2.3 Structural design principles
a) Foundations shall be so designed to minimize settlements,
especially differential settlements, which shall be kept within
limits preventing any danger to the construction and the equipment.
When necessary, piles of suitable type shall be provided.
b) The requirements related to fire protections shall be taken
into consideration. c) The requirements related to seismic force,
wind force and other unexpected
forces shall be taken into consideration. 2.2.4 Loadings The
design loadings shall conform to the requirements of adopted
standards and codes of practice, as well as special Site Conditions
and Technical Specifications. The minimum design loading shall
comply with the requirements of B.S. 6399. Where known loads exceed
those of BS 6399 the higher loading shall be adopted. The minimum
earthquake factor shall be taken as 0.15g as per UBC Standard
(Uniform Building Code). The revised zone is 2A. In the absence of
information covering any special case, the design shall be based on
loadings indicated by previous experience or by the results of
special tests. 2.3 Setting out and Construction Tolerances The
tolerance limits for the permanent finished earthworks will be as
follows: Horizontal dimensions will be within +75 mm and -75 mm of
the true dimensions shown on the approved drawings. For slopes to
embankments or cuttings the horizontal deviation between the top
and bottom of the slope will be within +5% and -5% of the true
horizontal component of the slope shown or calculated from the
approved drawings.Formation levels shall be within 0 mm and -25mm
of the
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WAM
Client: FEDERAL ELECTRICITY AND WATER AUTHORITY (FEWA) Project:
STANDARD SPECIFICATIONS FOR WATER WORKS
Engineer WATER DIRECTORATE - ASSET MANAGEMENT DEPARTMENT
Title: Technical Terms / Chapter-4 / Engineering Specifications
/ Civil Engineering Works Specification
CS01-GENERAL REQUIREMENTS
Office: DUBAI Order: Document:
MWA_PRO_07/WAM-04-CS01 Rev: OCT/2014 sheet: 8 of: 17
true levels shown on drawings.Other earthworks levels shall be
within +05 mm and -50 mm of the true levels shown on the approved
drawings. The contractor is responsible for the accuracy of all
setting out and construction tolerances. These shall not be greater
than the following : a) Setting out 1 in 3000 b) Structural steel
work : 1. Position of first erected column + 10mm 2. Linear
Dimensions up to 8m + 10mm From 8 to 15 m + 15mm From 15 to 25 m +
20mm Over 25 m + 25mm 3. Plumb of columns in 30 m height + 15mm 4.
Level of base of first erected columns + 5mm 5. Level of beam at
junction with column measured from transferred bench mark. +
15mm
6. Level of beam at junction with column measured from
transferred bench mark of storey in which beam is located + 10mm 7.
Levels of upper or lower surfaces of two or more beams meeting at a
column + 6mm 8. Difference in level of ends of a beam : Up to 8 m
long + 5mm From 8 to 15 m + 10mm c) In-situ Concrete : Mass
Concrete Foundations Dimensions on plan + 50mm Formation level +
50mm Level of upper surface + 25mm Reinforced concrete foundations
excepting Plant Foundations : Dimensions in plan 1 in 30 but not
exceeding 35mm Formation level + 25mm Level of upper surface + 20mm
Elements and components above Foundations including Plant
Foundations :
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WAM
Client: FEDERAL ELECTRICITY AND WATER AUTHORITY (FEWA) Project:
STANDARD SPECIFICATIONS FOR WATER WORKS
Engineer WATER DIRECTORATE - ASSET MANAGEMENT DEPARTMENT
Title: Technical Terms / Chapter-4 / Engineering Specifications
/ Civil Engineering Works Specification
CS01-GENERAL REQUIREMENTS
Office: DUBAI Order: Document:
MWA_PRO_07/WAM-04-CS01 Rev: OCT/2014 sheet: 9 of: 17
Position on plan measured from nearest building grid line + 10mm
Vertically - Plumb in height of : Up to 0.5 m + 5mm Over 0.5 m and
up to 1.5 m + 10mm Over 1.5 m and up to 3.0 m + 15mm Over 3.0 m and
up to 30 m + 20mm Cross Section and linear dimensions: Dimensions
of beams, slabs, columns & walls. Up to 300 mm + 5mm Over 300
mm and up to 600mm + 10mm Over 600 mm and up to 1.5 m + 15mm Over
1.5 m and up to 3.0 m + 20mm Over 3.0 m and up to 15 m + 30mm Over
15 m and up to 30 m + 40mm d) Level (permissible deviation from
designed level with reference to nearest temporary bench mark) :
Extensions above Plant Foundations Foundations Length of Elements:
Up to 8 m + 10mm + 5mm Over 8m and up to 15m + 15mm + 10mm Over 15m
+ 20mm + 15mm Overall dimensions of a concrete Framed building -
length and width for Dimensions: Up to 15 m + 15mm Over 15 m and up
to 30 m + 25mm For each subsequent 30 m + 15mm Height up to 30 m +
20mm e) Items Cast in Position : The permissible deviation of the
position of a component fixing or hole cast in shall not exceed +
10mm from its design position. 3. MATERIALS / SUPPLIERS/
MANUFACTURERS
Prior to ordering or delivering any materials or manufactured
item to site, the name and address of the Supplier and, , adequate
samples, sample schedules and Manufacturer's certificates for all
the materials and goods to be used in the works shall be submitted
to FEWA/Engineer for approval.
-
WAM
Client: FEDERAL ELECTRICITY AND WATER AUTHORITY (FEWA) Project:
STANDARD SPECIFICATIONS FOR WATER WORKS
Engineer WATER DIRECTORATE - ASSET MANAGEMENT DEPARTMENT
Title: Technical Terms / Chapter-4 / Engineering Specifications
/ Civil Engineering Works Specification
CS01-GENERAL REQUIREMENTS
Office: DUBAI Order: Document:
MWA_PRO_07/WAM-04-CS01 Rev: OCT/2014 sheet: 10 of: 17
The Contractor shall make available to their sub-suppliers/
manufacturers all the General and Specific conditions requirements
and shall get their acceptance in writing in the form of a letter
from all the sub-suppliers/ manufacturers to the effect that they
have fully read and understood their implications pertaining to
their scope of works and they shall confirm that they have fully
satisfied the requirements. The whole of the workmanship, goods and
materials incorporated in the works shall be new and of the best
quality available and shall be to the approval of FEWA/Engineer.
Should FEWA/Engineer discover on the works any materials other than
those approved, they may order their removal from site. Removal of
these unapproved materials from site is to be done at the expense
of Contractor. 4 . SOIL INVESTIGATIONS The Contractor shall employ
a specialized geotechnical Company to carryout complete soil
investigations at the proposed site, to determine the factors
influencing the design and construction such as the type of soil,
level of the ground water table, anticipated ground bearing
capacity, type of foundations to be adopted and any special
measures required to protect the foundations from adverse ground
conditions. The soil investigations shall take place immediately
and a report shall be submitted in advance of the commencement of
works. The Contractor shall only commence the work on Site after
reaching agreement with FEWA regarding the interpretation and
application of the data contained in the soil investigation report.
During the soil investigation the Contractor shall carry out, at
each Site, the operations listed in SR-03 as a minimum and shall be
provided with latest tests as required by Authority. In case
reports and summaries are given by FEWA, it shall be for
information only and to provide a guide to the possible conditions
existing at the site. The final designs and details must be based
on the findings of the Contractor's independent soil investigation.
5 SITE SURVEY
The Contractor shall employ a specialist surveying agency, if
required, to carry out topographical survey of the proposed
locations and submit topographical drawings with contours marked at
50 centimeter intervals. The required levels of cutting, grade
levels, general layout, location of the structures will be
finalized based on the topographical drawings. The Contractor shall
also carry out all dimensional and setting out checks on the
construction items as may be required by the technical sections of
interdisciplinary specifications of the contract. Four corners of
the plot shall be located at all proposed sites. A 1:100 scale plan
shall show all salient features above and below ground . All levels
shall be related to an agreed datum. This plan shall be submitted
to FEWA and approved prior to the commencement of the works. Two
No. Benchmarks based on Admiralty Chart Datum (ACD) shall be
established at nearby locations to the proposed sites by using
high-tech survey instruments. Site surveys shall be done at all
locations before and after earth works are completed and a 1:100
scale plan showing all salient features above and below ground
shall be submitted. All levels shall be related to ACD datum. This
plan shall be submitted to FEWA prior to the commencement of the
works. The Contractor shall be responsible for carrying out
complete Site survey at his own expense. After preparation and
submittal of his survey, he will be completely
-
WAM
Client: FEDERAL ELECTRICITY AND WATER AUTHORITY (FEWA) Project:
STANDARD SPECIFICATIONS FOR WATER WORKS
Engineer WATER DIRECTORATE - ASSET MANAGEMENT DEPARTMENT
Title: Technical Terms / Chapter-4 / Engineering Specifications
/ Civil Engineering Works Specification
CS01-GENERAL REQUIREMENTS
Office: DUBAI Order: Document:
MWA_PRO_07/WAM-04-CS01 Rev: OCT/2014 sheet: 11 of: 17
responsible for any deviation recorded afterwards. All survey
shall be based on the topographical drawings or plant general
layouts supplied along with the tender drawings. All levels shall
be based on ACD (Admiralty Chart Datum). The Easting and Northing
co-ordinates shall also be plotted accurately based on (UTM)
Universal Transverse Mercator system in accordance with the Global
Positioning System (GPS) network. 6. SITE PREPARATION, REQUIREMENTS
AND PROJECT LEVELS
Before commencing work at the Sites the Contractor shall submit,
for FEWA's approval, proposed finished Site levels, pavement and
road levels. Paving, aprons and concrete ground slabs shall be
constructed a minimum of 150 mm above the surrounding ground
levels. Plinth levels for structures shall not be less than 300 mm
above surrounding finished ground levels. The areas within which
the Works are to be constructed shall be cleared and graded to the
required levels. All debris shall be removed to sites approved by
FEWA and the Local Authorities. Low areas shall be raised using
approved fill material and high areas shall be reduced in
accordance with CS05 – EARTH WORK. 6.1 Safety All Contractor's
works shall be performed in accordance with best safe practices for
activities to be undertaken during construction.Detailed method
statements for each activity to be undertaken shall be prepared by
including all proposed safety measures submitted for approval
byFEWA/Engineer, which must be obtained prior to the start of the
activity concerned.All Contractor's personnel shall be suitably
trained to perform activities and in the safe use of all equipment
to be operated. 6.2 Fire Protection Adequate precautions shall be
taken against fire through all Contractors and Sub- Contractors
operations.Construction Practices, including cutting and welding,
and protection of adjacent materials during construction shall be
in accordance with good standard practices for such work. 6.3 Work
Protection The Contractor shall wherever required or directed by
FEWA/Engineer cover up and protect the works from the weather and
from damage by his own or other workmen performing subsequent
operations. He shall provide necessary dust sheets, hoardings,
barriers, guardrails etc. and clear away same at completion. 6.4
Maintenance of Traffic Flows, Temporary Diversions Details for
maintaining of traffic flow, Temporary road diversions and existing
road closures shall subject to approval of FEWA/Engineer and the
Federal Traffic Police. No Public or Private facility shall be
stopped or interrupted without the written permission of
FEWA/Engineer. 6.5 Existing Services Protection Before commencing
construction work the Contractor shall locate the routes and
identify all services in the Area. Preliminary excavation to locate
services shall be by hand tools. The Contractor shall take any and
all measures reasonably required by any Public or any Statutory
Authority for the support and full protection of all mains, pipes,
cables and other apparatus during the progress of the works, and
shall construct and provide to the satisfaction of FEWA/Engineer,
all works necessary for the prevention of damage or interruption of
services.
-
WAM
Client: FEDERAL ELECTRICITY AND WATER AUTHORITY (FEWA) Project:
STANDARD SPECIFICATIONS FOR WATER WORKS
Engineer WATER DIRECTORATE - ASSET MANAGEMENT DEPARTMENT
Title: Technical Terms / Chapter-4 / Engineering Specifications
/ Civil Engineering Works Specification
CS01-GENERAL REQUIREMENTS
Office: DUBAI Order: Document:
MWA_PRO_07/WAM-04-CS01 Rev: OCT/2014 sheet: 12 of: 17
The Contractor shall make all arrangements for protecting
existing services and for temporarily diverting them to maintain
the services without interruption.Existing services, pipes, mains,
ducts, etc., exposed in trenches for new work shall be protected in
accordance with the requirements of the relevant Authority before
trenches are refilled. The Contractor shall lay cables, fittings,
specials, etc., under hedges, fences, walls, etc., as necessary.The
Contractor shall ensure that no trees are damaged or permanently
removed in carrying out the Contract except where directed due to
the presence of permanent works and approval is given by the
relevant Authority. 6. 6 Scaffolding The Contractor shall provide,
erect, maintain, dismantle and clear away at completion proper and
adequate scaffolding including that required for Sub-Contractors
and Specialists. 7. SITE INSTALLATIONS
All the Constructional Equipment, tools, sheds and other
buildings, temporary works and items of whatever description
necessary to construct, complete in due time and maintain the whole
of the works shall be provided by the Contractor. The Contractor
shall arrange for the construction, maintenance and subsequent
reinstatement of any temporary access required during the execution
of the works at Site. The Contractor may apply to FEWA for approval
to use the same for temporary purposes such as temporary offices,
site shops and storage of materials. FEWA shall, on application
being made, point out the area that can be used for these purposes.
Should the Contractor find that the land provided for temporary
works is inadequate he shall, forthwith upon such inadequacy
becoming apparent, apply to FEWA giving details of his extra
requirements. If the Contractor shall require any land outside the
area of the Site for the storage or preparation of materials or for
other purposes in connection with the Works he shall provide it at
his own cost with the concern of local Authorities. Prior to
commencing the works on Site, the Contractor shall supply, erect
and maintain, at his own expense, a temporary hoarding/fence and
gate. The fence shall completely enclose the area of the Works and
isolate it from the existing structures if any. The Contractor
shall be responsible for the provision of all Site installations,
temporary services and facilities, including those for the use of
FEWA, as set out in CS02, SITE INSTALLATIONS. The Contractor shall
provide water and electricity for the works including that required
by the sub-contractors and provide all necessary temporary
work.Importing water by tanker and storing on site shall be allowed
for by the Contractor.Temporary electricity generating equipment,
should this prove necessary, shall be allowed for by the
Contractor. 8. NOTICE OF OPERATIONS
Prior to carrying out any operations relating to the Works, the
Contractor shall submit, for FEWA's approval, a method statement
containing all relevant drawings, details and calculations. This
method statement must be submitted in writing sufficiently in
advance of the proposed operations. Work shall not commence before
written approval has been received from FEWA. No concreting or
grouting operation shall be carried out without the written
permission of FEWA.
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WAM
Client: FEDERAL ELECTRICITY AND WATER AUTHORITY (FEWA) Project:
STANDARD SPECIFICATIONS FOR WATER WORKS
Engineer WATER DIRECTORATE - ASSET MANAGEMENT DEPARTMENT
Title: Technical Terms / Chapter-4 / Engineering Specifications
/ Civil Engineering Works Specification
CS01-GENERAL REQUIREMENTS
Office: DUBAI Order: Document:
MWA_PRO_07/WAM-04-CS01 Rev: OCT/2014 sheet: 13 of: 17
9. PERMIT TO WORK
The Contractor shall obtain a written ‘Permit to Work' (PTW)
whenever it is necessary to carry out work in areas where existing
plant is operating. Permits shall be obtained before commencing
work in any areas containing mechanical plant, electrical plant,
pipes or cables and when making connections to any existing
services including water, drainage, electricity, gas and
telephones. Written permits must also be obtained before any
excavations are started. It shall be the responsibility of the
Contractor to obtain records relating to any existing services from
the relevant authorities. Existing services must be carefully
located and exposed, by hand excavation, prior to the main
excavations taking place. When existing services lines are
encountered in the course of preparing excavations, they shall be
carefully maintained and supported in their original location and
protected from damage during the execution of the works till the
reinstatement of the region. 10. SIGN BOARDS The Contractor shall
provide and erect adequate number of sign boards at locations
directed by the concerned Department of FEWA/Engineer. The size of
the display boards shall be 5000 wide x 3600 deep or as directed by
the concerned Department of FEWA. The sign board shall be fixed
firmly on designed posts / bracing system in order to resist wind
force.The signboards shall carry the names of the project
Contractor, FEWA and the Engineer with logos including the
particulars of the local site. 11. EARTHWORKS 11.1 Clearing and
Grubbing This work shall consist also of clearing and grubbing the
area of the work within the limits of the Site and as ordered by
FEWA/Engineer of all debris, refuse, vegetation, demolition debris
and other deleterious material. If the wastes material suitable for
incorporation into or for use on the work, the amount of suitable
material shall be replaced by the Contractor at his expense. All
material removed by the clearing and grubbing operation shall be
transported from the site or otherwise disposed of as specified or
directed by FEWA/Engineer. With the exception of areas to be
excavated, all depressions made below the ground surface by the
removal of rubbish or existing works shall be refilled with
suitable material and compacted to the satisfaction of
FEWA/Engineer. Grading or excavation operations shall not be
started in any areas until clearing and grubbing within the area
affected have been completed. Fences, upon or within the limits of
the works and not necessary for the construction shall be removed
carefully by the Contractor completely or in part as specified or
directed. The materials so removed shall be piled neatly and in an
acceptable manner or otherwise disposed off as specified or
directed by FEWA/Engineer.
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WAM
Client: FEDERAL ELECTRICITY AND WATER AUTHORITY (FEWA) Project:
STANDARD SPECIFICATIONS FOR WATER WORKS
Engineer WATER DIRECTORATE - ASSET MANAGEMENT DEPARTMENT
Title: Technical Terms / Chapter-4 / Engineering Specifications
/ Civil Engineering Works Specification
CS01-GENERAL REQUIREMENTS
Office: DUBAI Order: Document:
MWA_PRO_07/WAM-04-CS01 Rev: OCT/2014 sheet: 14 of: 17
11.2 Excavations Generally Excavations shall be carried out to
the widths, lengths and depths described or directed and no
unlicensed or indiscriminate digging is permitted. Contractor shall
be responsible to excavate the areas near the existing plants by
hand shovel without causing any dust pollution. The Contractor
shall allow for risk of meeting and having excavating through any
sort of material including rock and buried concrete foundations, if
any.The Contractor may excavate by any method he considers
suitable, subject to the approval and shall allow for the use of
any types of machinery most suited for excavations in any location
and at any time. The Contractor is to include for all strutting and
shoring necessary for the safe execution of the works. Due care
shall be taken to protect existing under ground services such as
cables or pipes and where required shall be diverted. 11.2.1
Open-Cut Excavation For all fill and cut over 1.00 m in height,
sturdy stakes shall be placed at any change of direction of the
ground but in all cases at intervals no greater than 30 m as
directed by FEWA/Engineer.Survey points, bench marks, boundary
stones and the like shall not be removed without FEWA/Engineer
written consent. Removed boundary stones and markings shall be
stored according to FEWA/Engineer’s instructions. Extra bench marks
to be provided by the Contractor shall be furnished with a plate,
approximately 25 x 25 cm in size, with the bench mark inscription
painted in black letters on a light background with clearly legible
weatherproof oil paint. Permanent bench marks shall be provided on
brass plate fixed on concrete pedestal . Excavations in sand shall
be to a slope of 1:3, one vertical to three horizontal. If any
permanent slope is to be kept in the sand it shall be stabilized by
one of the following means, - 150 mm of compacted gatch (Road base
material ) - Cement/sand mixture - Bituminous/cement mixture -
Precast concrete paving tiles Bottom and slopes of open-cut
excavations on which concrete is to be placed shall be finished
exactly according to the established lines and slopes. To avoid
loosening of the soil, heavy equipment such as bulldozers or power
shovels shall not operate within 10 cm of the final lines of the
excavation bottom. The last 10 cm shall be excavated by means of
hand tools. 11.2.2 Excavated Materials During the construction of
the works, the Contractor may use materials from the excavation if
approved by the Engineer. Other excavated material shall be
backfilled where required or deposited where directed anywhere on
site. The Contractor shall remove the surplus materials from the
site. The Contractor shall at all times keep the site free from all
surplus materials, rubbish and offensive matter. 11.2.3 Bottom
Level of Excavation The bottom of all excavated areas shall be
trimmed, leveled and well rammed. The bottom level of excavations
or foundations shall be inspected and approved before foundations
are constructed.
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WAM
Client: FEDERAL ELECTRICITY AND WATER AUTHORITY (FEWA) Project:
STANDARD SPECIFICATIONS FOR WATER WORKS
Engineer WATER DIRECTORATE - ASSET MANAGEMENT DEPARTMENT
Title: Technical Terms / Chapter-4 / Engineering Specifications
/ Civil Engineering Works Specification
CS01-GENERAL REQUIREMENTS
Office: DUBAI Order: Document:
MWA_PRO_07/WAM-04-CS01 Rev: OCT/2014 sheet: 15 of: 17
11.2.4 Backfilling of Trenches Trench refilling shall fill shall
be compacted in layers not exceeding 200 mm thick, each layer being
well compacted to 95% of its maximum dry density by hand with iron
rammers weighing not less than 5 kg, until the trench has been
filled to a height of 300 mm above the top of the materials e.g.
cables/ducts etc. The remainder of the trench shall then be
refilled in compacted layers not exceeding 200 mm in thickness,
each layer being well compacted with power rammers, vibrating plate
compactors or other mechanical means until the ground is thoroughly
consolidated up to the required level for surface reinstatement.
Where cover to materials e.g. cables/ducts is less than 400 mm, or
where ordered by FEWA/Engineer, protection in the form of concrete
encasing shall be provided according to an approved drawing or as
ordered by FEWA/Engineer. 11.3 Dewatering The excavated surfaces
shall be kept dry and clean by pumping or any other method deemed
necessary and approved by the Engineer. Water from such dewatering
shall be properly drained away from the site or disposed off by
tankers. The Contractor in his tender shall cover the cost of
pumping or dewatering. No concrete, masonry brickwork or other
materials shall be placed or built until the surface is properly
drained. Where swamps, bogs or other similar wet areas have to be
traversed by the works, they shall be drained as directed by
FEWA/Engineer according to the materials and conditions
encountered. 11.4 Filling & Reinstatement Filling for trenches,
excavations and leveling of the site shall be deposited in layers
not exceeding 225mm in thickness each layer watered well and rammed
by mechanical rammers, to consolidate in 95 % of the maximum dry
density. Where excavations, whether in rock or other material, are
made to a greater depth than required or as instructed by the
Engineer, the intervening space shall be brought up to the proper
level in plain concrete of Grade C-20 Any ground encountered during
the excavations which is observed not suitable to bear the expected
loads which will be imposed on it, shall be excavated and replaced
with concrete of Grade C-20. Prior to the formation of embankments,
fills, etc., any unsuitable materials occurring on the site shall
be removed to such depths and widths as may be directed by
FEWA/Engineer and approved excavations shall be properly backfilled
with suitable and approved excavated materials and shall be
deposited and compacted to the satisfaction of FEWA/Engineer.
Similarly, soft or weak spots encountered will be removed and, as
with any voids, will be backfilled as specified. 11.5 Slips &
Settlements Proper strutting, sheeting and bracing, including
re-arrangement of the installations when necessary, protection of
slopes, methods of excavation to reduce risk of slides, etc., shall
be for the responsibility of the Contractor. Should any slips occur
in the excavations, banks or filling during the execution of the
works or during the period of maintenance from any cause
whatsoever, the contractor shall execute the necessary remedial
work in such manner and form and with such materials and/or as
approved by
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WAM
Client: FEDERAL ELECTRICITY AND WATER AUTHORITY (FEWA) Project:
STANDARD SPECIFICATIONS FOR WATER WORKS
Engineer WATER DIRECTORATE - ASSET MANAGEMENT DEPARTMENT
Title: Technical Terms / Chapter-4 / Engineering Specifications
/ Civil Engineering Works Specification
CS01-GENERAL REQUIREMENTS
Office: DUBAI Order: Document:
MWA_PRO_07/WAM-04-CS01 Rev: OCT/2014 sheet: 16 of: 17
the Engineer. The Contractor shall make good all settlement of
filling that may occur up to the end of the period of maintenance.
Where the nature of the soil gives reason to fear any drifting,
initial excavation operations shall be carried out with special
care. Excavation shall not be carried out below existing building
foundations, if any, until shoring to be performed by the
Contractor has been completed. All existing structures,
foundations, pipes and cables, if any, which are to be incorporated
into the final work shall be adequately protected or replaced by
the Contractor. 11.6 Compaction and Fill Areas In areas where
excavated or imported material is to be used as compacted fill, the
contractor will be required to achieve a density of not less than
95% of the dry density for the excavated or imported material. The
Contractor shall maintain all equipment, for determination and
checking of the compact density at the site and the tests shall be
carried out in the presence of the FEWA/Engineer. Foundations and
structures shall be backfilled with approved material compacted in
layers by suitable equipment until maximum density has been
obtained to the satisfaction of FEWA/Engineer. Compacting shall be
carried out with special care by means of pneumatic or mechanical
tampers of a type previously approved by FEWA/Engineer to avoid
damage to structures. Areas to be backfilled will be prepared so as
to obtain a soil density at least equal to 95 percent of Modified
Proctor test (ASTM D 1557). The thickness of loose fill layers
shall not exceed 300 mm unless the Contractor proves to the
satisfaction by test beds that the equipment and method of
compaction exceeds the required density. Surfaces receiving fill
layers shall, if smooth, be previously scarified to obtain a good
key between the new fill layer and the sub grade. Fill shall not be
deposited under water without FEWA/Engineer permission. This
permission may be granted to place rock fill by random dumping in
areas where the depth of water is greater than 30 cm but the
methods and quality of the fill material shall be subject to
approval and when the fill level is 50 cm above the water surface
it shall be compacted until there is no discernible movement under
the equipment used for placing or compacting fill. Thereafter,
normal backfilling and compaction shall be resumed. 11.7 Stockpiles
and Disposal Excavation material from the works selected by
FEWA/Engineer for use shall be placed in its final position, if
possible, or otherwise may be stockpiled or deposited on site as
directed by FEWA/Engineer. Only the stockpiling of rock, gravel and
other non-cohesive materials to be used for permanent work will be
permitted.
-
WAM
Client: FEDERAL ELECTRICITY AND WATER AUTHORITY (FEWA) Project:
STANDARD SPECIFICATIONS FOR WATER WORKS
Engineer WATER DIRECTORATE - ASSET MANAGEMENT DEPARTMENT
Title: Technical Terms / Chapter-4 / Engineering Specifications
/ Civil Engineering Works Specification
CS01-GENERAL REQUIREMENTS
Office: DUBAI Order: Document:
MWA_PRO_07/WAM-04-CS01 Rev: OCT/2014 sheet: 17 of: 17
In no case shall the stockpiling of silt or disintegrated rock
to be used in structural fills be permitted. Spoil unfit for re-use
shall be removed by the Contractor to sites approved by
FEWA/Engineer. Contractor shall trim and form the edges of soil to
profiles and levels as directed by FEWA / Engineer. He shall also
maintain without interruption the flow of water courses affected by
the disposal of spoil materials. The placing of materials within
the waste areas shall be made in layers not exceeding 50 cm in
thickness in order to obtain an appreciable degree of compaction by
means of the transportation equipment. All traffic towards or from
the waste areas shall be continuously directed and changed for the
total covering of the surface of such areas in order to take
advantage of the weight of vehicles for compaction. Waste areas
shall be located in those places where, they do not interfere
either with the natural flow of water or with future structures and
where they can not impair the general appearance of the completed
structures or impede access to the different structures. 11.8 Field
Test The control of working and tests operations will be carried
out by FEWA/Engineer with the full assistance of the Contractor.
The Contractor will prepare sheets for statistical analysis of the
field and laboratory tests as required in accordance with the
respective ASTM or BS requirements. Field density tests in
accordance with BS 1377 will be required to be carried out by the
Contractor at each successive layer of fill at a sampling rate
determined by FEWA/Engineer.