Method statement

METHOD STATEMENT
FOR
EXPANSION OF OSMANI INTERNATIONAL AIRPORT, SYLHET (1ST PHASE)
SMCGCL-TCCL JOINT VENTURE

Expansion of Osmani International Airport, Sylhet (Phase-1) Method Statement
SMCGCL-TCCL JOINT VENTURE Page | i
TABLE OF CONTENTS
1 PROJECT LOCATION AND DESCRIPTION...................................................................1
2 INTRODUCTION.............................................................................................................1
3 DETAIL CONSTRUCTION DRAWINGS..........................................................................1
3.1 Survey ................................................................................................................... 1
3.2 Construction Drawings........................................................................................... 1
3.3 As-built Drawings................................................................................................... 1
4 SITE FACILITIES ............................................................................................................2
4.1 Site Access............................................................................................................ 2
4.2 Site Planning and Layout ....................................................................................... 2
5 PLANT AND EQUIPMENT..............................................................................................2
6 MANPOWER...................................................................................................................2
7 LABORATORY................................................................................................................2
7.1 Location and Design .............................................................................................. 2
7.2 Equipment.............................................................................................................. 3
8 SITE PLANNING AND PREPARATION ..........................................................................5
9 MOBILIZATION OF THE MACHINERIES AND EQUIPMENT .........................................6
10 SURVEY WORK .............................................................................................................6
11 CONCRETE FOR STRUCTURES ..................................................................................6
11.1 Mix Design............................................................................................................. 6
11.2 Trial Batch Tests.................................................................................................... 7
12 BATCHING AND MIXING CONCRETE...........................................................................7
12.1 Batching................................................................................................................. 7
12.2 Mixing and Delivery................................................................................................ 7
13 FORMWORK FOR STRUCTURES.................................................................................7
13.1 Scaffolding............................................................................................................. 7
13.2 Steel Formwork...................................................................................................... 7
13.3 Rough Formwork ................................................................................................... 7
14 CONSTRUCTION METHODOLOGY...............................................................................7
14.1 General Compliances ............................................................................................ 7
14.2 Construction Method for Building Works ................................................................ 8
14.3 Construction Sequence of Foundation Earthwork .................................................. 8
14.4 Fabrication & Binding of Reinforcement ................................................................10
14.5 Construction Sequence of bored cast-in-place pile ...............................................11
14.6 Construction Method for Concrete ........................................................................14
14.7 Construction Method for Brickworks......................................................................15
14.7.1 Machine made pressed bricks.......................................................................15
14.7.2 Patent Stone .................................................................................................16
14.7.3 Mortar for Brick Masonry...............................................................................16
14.8 Construction Method for Plaster............................................................................16
14.8.1 Preparation of Mortar ....................................................................................16
14.8.2 Surface Preparation ......................................................................................16
14.8.3 Application of Plaster ....................................................................................16
14.8.4 Protection & Curing.......................................................................................16

SMCGCL-TCCL JOINT VENTURE Page | ii
14.9 Construction Method for Fair Face Concrete.........................................................17
15 STEEL STRUCTURE WORKS......................................................................................17
15.1 Structural Steel & Other Materials.........................................................................17
15.2 Fabrication of Steel Materials................................................................................17
15.3 Cutting Method .....................................................................................................18
15.3.1 Marking.........................................................................................................18
15.3.2 CNC Oxy-Fuel Machine ................................................................................18
15.3.3 CNC Plasma Machine...................................................................................18
15.3.4 Steel Plate Cutting Machine ..........................................................................19
15.3.5 Saw machine for H-shape.............................................................................19
15.4 Fit-up Method........................................................................................................19
15.5 Welding Method....................................................................................................20
15.6 Built-up Section.....................................................................................................21
15.6.1 Bevelling of Steel for built-up beam...............................................................21
15.6.2 Assembly of Built-up Beam ...........................................................................21
15.6.3 Welding of H Beam .......................................................................................22
15.7 Straightening Method............................................................................................22
15.8 Drilling Method......................................................................................................23
15.9 Painting Method....................................................................................................23
15.10 Packaging Method ............................................................................................24
15.11 Erection of Structural Steel................................................................................24
16 PLACING OF TILES......................................................................................................26
16.1 Preparation of Mortar ............................................................................................26
16.2 Fixing Method of Internal Wall Tiles ......................................................................26
16.3 Laying Floor Tiles by the Direct Mortar Bedding Method.......................................26
17 PAINTING WORK .........................................................................................................27
17.1 Water Repellent Coating.......................................................................................27
17.2 Synthetic Enamel Paint.........................................................................................27
17.3 Wood Varnishing...................................................................................................27
17.4 Plastic Emulsion Paint...........................................................................................27
17.5 Weather Coat........................................................................................................27
18 GLAZING WORK ..........................................................................................................27
19 INSTALLATION OF ALUMINIUM FRAME.....................................................................28
20 INSTALLATION OF PLUMBING & FIRE FIGHTING SYSTEM......................................28
20.1 Plumbing & Drainage System ...............................................................................28
20.1.1 Water Pipeline Installation.............................................................................28
20.1.2 Sanitary Ware Installation .............................................................................28
21 INSTALLATION OF ELECTRICAL SYSTEM.................................................................29
21.1 Cable Containment System ..................................................................................29
21.2 Cable & Wiring......................................................................................................29
21.3 Lighting .................................................................................................................29
21.4 MCC, LT & HT Panel Installation ..........................................................................29
21.4.1 Motor Control Centre.....................................................................................29
21.4.2 LT Switchgear, HT Switchgear & Associated Equipment...............................30
22 INSTALLATION OF FIRE FIGHTING SYSTEM ............................................................30
22.1 Fire Fighting System.............................................................................................30
23 INSTALLATION OF FIRE DETECTION SYSTEM.........................................................30
24 CONSTRUCTION METHOD FOR TAXIWAY................................................................31

SMCGCL-TCCL JOINT VENTURE Page | iii
24.1 Sub-base Construction..........................................................................................31
24.2 Aggregate Base Course Construction...................................................................31
24.3 Bituminous Carpeting Construction.......................................................................31
24.3.1 Cleaning Surface...........................................................................................31
24.3.2 Application of Bituminous Material ................................................................31
24.3.3 Spreading of Course Aggregate....................................................................32
24.3.4 Preliminary Rolling ........................................................................................32
24.3.5 Bituminous Material Application ....................................................................33
24.3.6 First Penetration, Filling and Rolling..............................................................33
24.3.7 Second Penetration, Filling and Rolling.........................................................33
24.3.8 Protection of Structures from Bituminous Material.........................................33
24.3.9 Surface Tolerances.......................................................................................33
24.3.10 Bituminous Tack Coat Construction Methods................................................33
25 INSTALLATION OF HVAC SYSTEM.............................................................................34
25.1 Chilled Water System............................................................................................34
25.2 Ductwork...............................................................................................................34
25.3 Air Handling Unit (AHU) ........................................................................................34
25.4 Fan Coil Units .......................................................................................................35
25.5 Fans......................................................................................................................35
26 INSTALLATION OF ELEVATORS.................................................................................35
26.1 Hoisting of Major Equipment .................................................................................35
26.2 Receipt of Lift Shaft...............................................................................................35
26.3 Plumbing of Lift Shaft............................................................................................35
26.4 Distribution / Location of Major Equipment Prior to Installation..............................35
26.5 Shaft Component Installation ................................................................................35
26.6 Guide Rail Installation ...........................................................................................36
26.7 Landing Entrance Installation................................................................................36
26.8 Hoisting Machinery and Control Panel Installation ................................................36
26.9 Shaft Trunking / Components................................................................................36
26.10 Slow Speed Test...............................................................................................36
26.11 High Speed Test ...............................................................................................36
26.12 Load Test..........................................................................................................36
27 INSTALLATION OF ESCALATORS ..............................................................................37
27.1 Unloading & Moving Escalator ..............................................................................37
27.2 Receipt of Escalator Shaft.....................................................................................37
27.3 Installation of Escalator.........................................................................................37
27.4 Start-up Test.........................................................................................................37
27.5 Setting and Measurements ...................................................................................37
27.6 Other Tests...........................................................................................................38
28 INSTALLATION OF BAGGAGE HANDLING SYSTEM .................................................38
28.1 Preparation Work..................................................................................................38
28.2 Erection of Conveyors, Conveyor Supports and Racks.........................................38
29 INSTALLATION OF BAGGAGE SCREENING SYSTEM...............................................38
29.1 Delivery of Equipment...........................................................................................38
29.2 Installation.............................................................................................................38
30 QUALITY CONTROL ....................................................................................................39
31 DOCUMENT CONTROL ...............................................................................................39
32 HSE PLAN ....................................................................................................................40
32.1 Objectives.............................................................................................................40

SMCGCL-TCCL JOINT VENTURE Page | iv
32.2 Organization and Responsibilities .........................................................................41
32.2.1 Project – Organization Chart .........................................................................41
32.2.2 Responsibility on HSE Matters......................................................................41
32.3 Managing risks in the work place ..........................................................................46
32.4 Hazard analysis and mitigation .............................................................................46
32.4.1 Assessment of Hazards: ...............................................................................46
32.4.2 Mitigation Measures......................................................................................46
33 ENVIRONMENTAL IMPACT & MITIGATION ................................................................50
33.1 Environmental IMPACT and its Evaluation............................................................50
33.2 Possible Mitigation Measures................................................................................50
33.2.1 Ecological Prevention Measures during Construction....................................50
33.2.2 Reclamation of land temporarily-used ...........................................................50
33.2.3 Conditions of soil borrowing filed and slag dumping field...............................51
33.2.4 Strengthening publicity and education of ecological protection......................51
33.2.5 Management measures such as construction supervision.............................51
33.2.6 As stipulated Noise Limitation on Construction Site.......................................52
33.2.7 Measures for vibration prevention and control during construction................52
33.2.8 Measures for wastewater treatment during construction ...............................52
33.2.9 Control and treatment measures for waste gas and dust during construction
period 52
33.2.10 Management measures for construction solid waste.....................................53
33.2.11 Measures for easing social impact during construction period.......................53
34 SECURITY MANAGEMENT PLAN ...............................................................................54
34.1 Organization and Responsibilities .........................................................................54
34.1.1 Security Organization Chart ..........................................................................54
34.1.2 Responsibilities .............................................................................................55
34.2 Instruction for Safety.............................................................................................57
34.2.1 Main Gate .....................................................................................................57
35 QUALITY ASSURANCE PLAN (QAP)...........................................................................58
35.1 Critical works regards to Quality:...........................................................................58
35.2 Inspection, Sampling and Testing .........................................................................58
35.3 Work Method of QAP compliance .........................................................................59
35.4 Specific Quality Assurance Plan (QAP).................................................................59
35.5 Inspection, Sampling and Testing .........................................................................59
35.6 Quality Control Tests during Construction.............................................................59

SMCGCL-TCCL JOINT VENTURE Page | 1
1 PROJECT LOCATION AND DESCRIPTION
The Project titled "Expansion of Osmani International Airport, Sylhet (Phase-1)"envisages all the works associated with the
Expansion work of Osmani International Airport, Sylhet, (1st Phase). The Project is located at Osmani International Airport,
Sylhet, Bangladesh. The full extent of the Works comprises of but not limited to:
i). Construction of International Passenger Terminal Building in/c. all other facilities as an international standard like,
a) RCC-steel composite structure,
b) Decorative works including all sorts of finishing works,
c) Installation of passenger boarding bridges,
d) Installation of Arrival and departure baggage handling systems, lifts and escalators,
e) Installation of HVAC system in/c. all other electro-mechanical equipment, access control system and
scanning machines,
f) Installation of Communication equipment,
g) Supply of lounge furniture,
h) Construction of Control Tower Building, cargo terminal building, cargo annex building, fire-fighting station,
internal roads and car parks etc.
ii). Construction of Apron with Pavement Quality Concrete (PQC) and Lean Mix Concrete (LMC) over stabilized base
course, sub base and improved subgrade works.
iii). Construction of Flexible Pavement for Taxiway with Hot Mix Asphalt (HMA) over stabilized base course, sub base
and improved subgrade works.
This method statement includes the provision of all labor, material, plant, machineries, equipment and other relevant work
necessary for "Expansion of Osmani International Airport, Sylhet (Phase-1)" - project. All construction work shall conform to
the standards mentioned in the relevant clauses of the particular specification.
2 INTRODUCTION
Method statement of construction of culvers has been prepared to demonstrate the appropriate methodology of works to be
complied during execution of works at field. The methodology comprises of required manpower, equipment to be used in the
construction of the various components, prioritization of structures, number of sites to be constructed simultaneously, health
and safety compliance, environmental management/mitigation, quality compliance during construction etc.,
3 DETAIL CONSTRUCTION DRAWINGS
Contractor shall submit the shop drawings (updated design drawings) for approval of the Engineer prior to the commencement
of the actual works.
3.1 Survey
Before proceeding with the works, Contractor shall survey the working site jointly with the Procuring entity and the Engineer’s
representatives in accordance to the design drawings for preparing construction/shop drawings.
3.2 Construction Drawings
Contractor shall submit the shop drawings (updated design drawings) for approval of the Engineer prior to the commencement
of the actual works.
3.3 As-built Drawings
Contractor shall progressively prepare As-Built Drawings covering the whole of the Works. As-built Drawings shall be based
on the Construction Drawings. Amendments and changes to the Construction Drawings shall be recorded on a set of

Construction Drawings kept specifically for this purpose. Contractor, on completion, will produce from them a final, complete
set of As-Built Drawings depicting accurately the location, dimensions and nature of the completed Works.
4 SITE FACILITIES
4.1 Site Access
Access to the Site shall be limited to the locations either shown in tender drawing No: CA-GEN-041 to CA-GEN-058 or agreed
with the Engineer prior to the commencement of the Works on Site. Contractor is required to provide adequate staff and gates
to control the access at these locations and shall submit details of all matters relating to security for the approval of the
Engineer prior to the commencement of the Works on Site.
With regard to the haulage of plant and materials over public roads adjacent to the Site, Contractor shall be required to arrange
these matters with the appropriate local authorities in order to accommodate their requirements, comply with all local
regulations and by laws and minimize inconvenience to the public. Details of all such arrangements shall be submitted to the
Engineer for approval.
4.2 Site Planning and Layout
CAAB shall provide suitable space required by Contractor for mobilization of plants, machineries, equipment, material,
stockpiles, site office, laboratory, labor accommodation, stores etc. within the airport premises.
Contractor shall submit for the prior approval of the Engineer, his proposals for the layout of his working area and other facilities
by following BNBC Building Code (latest edition) or equivalent for the design of buildings and other structures.
The following major plants and work areas are planned to be set up on site:
 Batching Plant,
 Rebar Storage & Fabrication Yard,
 Formwork Fabrication Yard,
 Structural Steel Fabrication Yard,
 Storage Area,
 Transportation route for heavy machine and equipment.
The above-mentioned plant and site areas will be mobilized/erected on site upon taking over of the works areas.
5 PLANT AND EQUIPMENT
Detail attached in Form A1 under TDS.
6 MANPOWER
Detail attached in Form PW3A-5 under TDS.
7 LABORATORY
7.1 Location and Design
The specific location of the laboratory will be agreed on Site by the Engineer. The laboratory shall be of good quality
construction, and the design and materials shall be suited to the climatic conditions prevailing in the area. The design and
other requirements of the laboratory shall be followed as per Appendix -3 and Appendix -4 of General Specifications under
Section 7 of Tender Document.

7.2 Equipment
Table 1.0: Laboratory Equipment List
Sl.
No
Name of Equipment Capacity Accuracy Quantity Remarks
General Equipment
1 Electric Oven 720 litres 250 oc 2
2 Compressive Strength Test Machine 2000 kN 1
3
Los Angeles Abrasion (LAA)Testing Machine
with full Apparatus
1
4 ACV & TFV Test Full Apparatus 1 set
7 Electric Scale 300 kg 1
8 Electric Balance 30 kg 7
9 Electric Balance 2 kg 1
10 Electric Balance 600 gm 0.01 gm 4
11 Triple beam balance 2610 gm. 0.1 gm 1
12 Round hot plates 1500 w 1
13 Plastic measuring jar
50 ml 1
100 1
250 1
500 2
1000 6
14 Unit Weight Measure Mould 5,10,15 litre 3
15 Pycnometer Bottle/Specific Gravity Bottle 50 ml 4
Liquid & Plastic Limit test set
1
Liquid Limit & Plastic Limit / Atterberg limit full
apparatus
2
2 Spatula 2
3 Moisture can/tin 55x35mm 24
MDD Test Apparatus
1 Proctor mould (standard) 0.000944 m3 2
2 Proctor mould (Modified) 0.002124 m3 4
3 Proctor Hammer (standard) 2.54 kg 2
4 Proctor Hammer (Modified) 4.54 kg 2
Field Density Apparatus
1
6-inch Sand Cone with Base Pleat (Cast
Aluminium)
7
2 Sand Calibration Mould 3
3
Speedy moisture tester with calcium carbide
(reagent)
3
Grain Size Analysis Test

Sl.
No
1
Soil Hydrometer & Particle Size Analysis test
apparatus
1
2 Soil Hydrometer 12
3 Glass Measuring Cylinder jar 1000 ml 7
Concrete Test
1 Flakiness Gauge 2
2 Elongation Gauge 2
3 Sand Absorption Cone and Tamper 1 set
4 Slump Cone with base plate 5
5 Cylinder Mould 4" dia 36
6 Cube Mould 6" sq. 78
7 Temping Bar 5
8 Temping Rod 4
Cement Test
1 Mortar Cube Mould 2" x 2" 3
2 Vicat Apparatus 1 set
Others Accessories equipment
1 Stainless Flexible Spatulas above 6" 3
2 Stainless Flexible Spatulas above 8" 1
3 Density Wear Basket 1
4 Kodal/Grubber 1
5 Shovel 1
6 Spoon 3
7 Tray (Big) 2
8 Tray (Small) 3
9 Gas Stove & Gas Cylinder 2
10 Steel Bowl 4
11 Plastic Bowl 3
12 Water Becket 2
13 Vernier Scale 1
14 Computer (Desktop) 1 set
15 Glass Thermometer 200 oC 10
16 Rubber mallet 1.5 pound 5
17 Heat Resistant Gloves 5
18 Moisture can/tin
size Ǿ75mm x
h 62mm
33
19 Sodium sulphate for soundness test 2
20 First Aid Box 1
Sieve: 300mm dia:
1 75 1
2 63 1
3 53 1
4 25 1
5 10 1
6 Pan 1

Sl.
No
Sieve: 200mm dia:
1 50 2
2 45 2
3 40 1
4 38 1
5 37.5 2
6 31.5 2
7 28 1
8 25 1
9 23 1
10 20 1
11 19 1
12 16 1
13 14 1
14 12.5 1
15 10 1
16 9.5 2
17 8 1
18 6.3 1
19 5 1
20 4.75 3
21 4.0mm 1
22 2.36 5
23 2.0 mm 1
24 1.7mm 1
25 1.4mm 1
26 1.18 mm 4
27 0.600 mm 5
28 0.425 mm 2
29 0.300 mm 4
30 0.150 mm 4
31 0.90 mm 1
32 0.80 mm 1
33 0.50mm 1
34 0.090 mm 1
35 0.08 mm 1
36 0.075 mm 9
37 Pan 4
38 Wash sieve (0.075mm)
dia 203mm x
height 102mm
1
8 SITE PLANNING AND PREPARATION
 Approved methods, work plan, Quality assurance plan, approved alignment drawing, construction drawing must be
available at site.
 Technical matters and issues will be coordinated through meetings and site visits.
 Permits and certificates will be obtained from concerned authorities whenever required.
 Good communication system will be adopted by telephone/ mobile phones/ E-mails/ fax system etc.
 Comply with construction safety, health and environmental requirements as specified.

9 MOBILIZATION OF THE MACHINERIES AND EQUIPMENT
 Mobilization of all machineries and equipment shall be done in accordance with the specifications and telecommunication
net will be established. Mobilization shall be continuing till the substantial completion of the works as per physical
requirements.
10 SURVEY WORK
Before proceeding with the works, Contractor shall carry out traverse survey, profile leveling survey jointly with the Procuring
entity and the Engineer’s representatives in accordance to the design drawings for preparing construction/shop drawings.
Method of survey works shall consist of the following;
 Coordinate System,
 Traverse Survey,
 Levelling Survey,
 Centerline Survey and Profile Levelling,
 Cross Section Levelling,
 Compiling and Mapping.
Fig 1.0: Survey and setting out work
11 CONCRETE FOR STRUCTURES
11.1 Mix Design
Concrete mix design shall be such that:
 Workability and consistency are achieved for proper placement into forms and around reinforcement, without segregation
or excessive bleeding.
 Resistance to special exposures to meet the durability requirements are provided, and Conformance with strength test
requirements is ensured.
 The approved mix shall be proportioned by weight or, except cement by volume, if volume batching is approved by the
Engineer. Allowance shall be made for the moisture content of the aggregates.
 Fine and coarse aggregates and water may only be measured by volume in boxes or containers approved by the
Engineer. Cement shall be added to Concrete Mixer by whole number of bags only.

11.2 Trial Batch Tests
 Satisfactory performance of the proposed mix design shall be verified by laboratory tests on trial batches. The results of
such tests shall be furnished to the Employer/Engineer.
12 BATCHING AND MIXING CONCRETE
12.1 Batching
 Measurement and batching of materials shall be done at a batching plant.
 The location of the batching and mixing plant shall be agreed with the Engineer/Employer, and Contractor shall submit
to the Engineer/Employer for approval, before erection of any mixing plant as per proposed arrangements for the storage
of aggregates and the batching and mixing of concrete.
12.2 Mixing and Delivery
 When batches are hauled to the mixer, bulk cement shall be transported either waterproof compartments or between the
fine and coarse aggregates. Sacked cement may be transported on top of the aggregates.
 The concrete shall be mixed until a mixture of uniform color and consistency is obtained.
 Mixing and delivery of concrete shall be in accordance with the appropriate requirements of respective sub-clause of
particular specification.
 Delivery of concrete shall be so regulated that placing is at a continuous rate unless delayed by the placing operations.
The intervals between deliveries of batches shall not be so great to allow the concrete in place to harden partially, and in
no case, shall such interval exceed 45 minutes.
13 FORMWORK FOR STRUCTURES
13.1 Scaffolding
 Details, plans and structural calculations for scaffolding shall be done by the Contractor.
 All scaffolding shall be designed and constructed by the Contractor to provide the necessary rigidity and to support dead
and live loads without deflection or deformation.
 Contractor will employ screw jacks or hardwood wedges to take up any settlement in scaffolding and formwork, either
before or during the placing of concrete.
13.2 Steel Formwork
 Where internal vibrators are likely to come into contact with the forms, steel formwork shall be used. All joints and holes
shall be caulked or covered with tape which shall be firmly fixed by means of spirit glue or other oil and grease resistant
adhesive.
 All rivets and bolts on the inside of the formwork shall be countersunk.
13.3 Rough Formwork
 Rough formwork shall be grout proof and will be used for applicable classes of Concrete Finishes which are not exposed
in the finished work.
 On surfaces which shall receive waterproofing membrane, imperfections shall be made good to the satisfaction of the
Employer/Engineer.
 Immediately before the waterproofing operation the surface shall be water jetted or grit blasted to provide a lightly textured
finish.
14 CONSTRUCTION METHODOLOGY
14.1 General Compliances
 Communication of work starting dates and time to Employer/Engineer

 Mobilization of Equipment, Manpower/Construct temporary facilities, (accommodation, tube-well, Toilet etc.)
 Setting out of works establishing the TBM with RL and coordinates
 Construct the diversion/detour/access
 Excavate the foundation soil and dispose the debris to designated place
 Stock pile the suitable earth materials at designated areas
 Establish safety fence and deploy safety staff
 Clean, oil and stockpile the shutter materials at location
 Stockpiling of cement and Rebar at rainproof and sun proof shed on elevated platform
 Stockpiling of construction materials at designated location
 Establishment of safe traffic management.
 Regular safety check of all equipment, plant, machineries, vehicle etc.
 Environmental mitigation and management
 Quality testing of materials and works.
 Inspection, Sampling, testing and approval by the Employer/Engineer
14.2 Construction Method for Building Works
Flow Diagram for Construction Sequence of Building Engineering for construction technologies of building works.
14.3 Construction Sequence of Foundation Earthwork
After mobilization of construction teams to the site, they arrange measurement control network and set out for location of
building construction according to design drawings. Supervising engineers inspect and issue certificates on the site in order
to carry out foundation earth excavation.
Foundation trenches shall be excavated by manual. The excavated earth materials shall be stored in the spoil in a
designated for used in earth filling; after excavation to the bottom elevation of cushion, the cushion inspection with the on-
site supervising engineer. After the concreting above the ground level, the foundation trenches will be backfilled immediately
in order to prevent rainwater to immerse subgrade; the foundation trenches shall be backfilled and compacted in layers.
Construction preparation
Completion handover
Manufacture of concrete
specimen
Surveying and setting out
Foundation excavation
Foundation construction
Reinforcement laying-off
Construction of main body frame
Waterproof of roofsWall building and installation of
door and window
Manufacture of mortar
specimen
Interior and exterior decoration
Interior water supply & drainage
and electric illumination
Acceptance inspection

When indoor floor is higher than outdoor ground and filling is required, soils shall be borrowed according to the soil borrow
requirement designated by the design. Earthworks shall be filled in layers and compacted by machines and tools. The next
procedure can only be started when they pass inspections.
Adequate lighting facilities shall be provided for construction at night. Foundation trenches, machinery and other risky
objects shall be provided with clear signs. And the excavation sequences shall be reasonably arranged in order to prevent
wrong excavation or over excavation.
Flow diagram for construction sequence of foundation earthwork as follows:
Surveying and setting out
Artificial excavation with control points
Artificial trench cleaning
Earthwork backfills
Quality evaluation
Foundation excavation
Unqualified
Checking of building line
Acceptance of trench
Sampling test
Foundation acceptance
Qualified
Qualified
Unqualified
Qualified
Unqualified
Qualified
Unqualified

14.4 Fabrication & Binding of Reinforcement
 Reinforcement joints/laps shall be made according to the design requirements and provisions of construction
standards. Quality of Reinforcement Steel, its properties including strength, elongation, bending, splicing, hooking,
covering and all related events shall be in accordance with the requirements of ACI 318-89. Deformed bars, when
used shall meet the requirements of BDS-ISO 6935-2:2006, BDS 1313:1991, ASTM A615M or latest such equivalent
standard of specification.
 Reinforcements shall be made straight prior to processing with local bending.
 All coiled and curved rebar shall be straightened. Φ12mm or below rebar shall be straightened by winding engines;
Φ6mm or below rebar shall be straightened by bar straighteners.
 During straightening, the elongation of rebar shall be controlled less than 1%. Rebar more than Φ12mm shall be
straightened manually.
 The deviation of the center line of rebar shall be no more than 1% of its full length. The surface scars shall be no
more than 5% of the cross sections of rebar.
 The bending of rebar shall be processed by steel bar benders under normal temperature without heating.
 Rebar shall be bent and pressed gradually from the center of rebar to both ends.
 For flash butt welding, dirt, oil and wax on the weld surfaces shall be removed before butt welding.
 Take a test weld for each batch of rebar before welding. Formal welding shall not be started until the welded
specimens pass the inspection.
 Arc welding generally uses double-welded lap weld. Weld bead length shall be no less than the lap length.
 Weld bead height h≥0.3d and shall not be less than 4mm; weld bead width b≥0.7d and shall not be less than 10mm.
 With respect to reinforcement binding, the stirrups of reinforcement cages shall be perpendicular to the main
reinforcement.
 All joint points between the stirrup corners and the main reinforcement shall be bound, but the joint points between
whole straight portion of stirrups and main reinforcement can be bound in quincunx alternatively with intervals.
 The crossing points of reinforcements shall be bound alternatively with Φ1-2mm iron wires in order to change the
direction of wire winding by points (splayed distribution) or ligated firmly in double diagonal lines (cruciform).
 The iron wires used for binding shall be galvanized ones. At the intersections of beam columns, the primary and
secondary stressed reinforcement and the convenience for pouring of concrete shall be considered in order to
determine the fixing means of reinforcement.
 Reinforcement installation shall be coordinated with other engineering in order to achieve reasonable alternate
procedures.
 During installation, install the main part first and then other parts.

Flow Diagram for fabrication of reinforcements as follows:
14.5 Construction Sequence of bored cast-in-place pile
 Site clearing and grubbing and dispose up all debris
 Setting out of pile points shall be done by total station machine according approved design
 Mobilize piling rig and test pile shall be constructed
 Construct bentonite slurry and mud tank
 Required cubes shall be taken for verification of specified strength
 Mobilize load test equipment, loading materials, hydraulic jack and load gauges
 Break pile head and make even loading pile head to place hydraulic jack
 Set out load beams, reference beams and loading jack and gauges
 Arrange sand filled gunny bags or concrete blocks and loading beams
 Apply load as per approved loading sequence after gaining maturity (28 days)
 Record readings of settlements and recovery while unloading with approved sequence
 Calculate the net settlement and prepare the report/results
 Present the result and obtain approval
 If found complied with design, Proceed for service pile construction
 Cubes and slump shall be taken and tested for verification of design strength
 Dispose up all waste to designated location
 After completion of service pile conduct load test on service as per the sequence stated above obtain approval from
the Employer/Engineer and start next sequence of construction refer to pile cap
Reinforcement setting out
Preparation of reinforcement
Reinforcement binding
Next procedure
Joint test
Unqualified
Qualified
Semi-finished
product inspector
Concealed
acceptance
Qualified
Unqualified
Qualified
Unqualified

Fig 2.0: Boring/Drilling for cast-in-place bored pile construction
Fig 3.0: Lowering of temporary casing for cast-in-place bored pile construction

Fig 4.0: Rebar cage lowering for cast-in-place bored pile construction
Fig 5.0: Pouring tremie concrete for cast-in-place bored pile construction
14.6 Construction Method for Concrete
The construction shall not proceed until the supervisors have carried out concealed work inspection and conformed the
concrete by signature prior to its pouring.

Laboratory Engineer shall inspect the material quality, mixing ratio and concrete slump, strictly control the construction mix
ratio and water-cement ratio, etc.
During pouring of frames, beams, plates, columns, slabs and platform concrete, the operations shall be carried out by standing
firm on operating floors or steady scaffolds instead of directly standing on molds, supports or reinforcement cages. Take
reinforcement measures to prevent the loosening and expansion of molds and supports, in order to ensure the accuracy of
structural dimensions and elevations.
When concrete is poured for high columns, pouring holes shall be provided in metal chute/channel in order to ensure that the
fall of concrete is less than 1.5m. When the pouring of concrete is completed, it shall be covered and cured timely.
During concrete construction, concrete cubes/cylinder shall be taken according to specifications and be cured pre-constructed
curing tank. After gaining the maturity of cubes those shall be crushed in compression testing machine, is derived test results
show any nonconformity, then corrective actions shall be taken according to the instruction of Employer/Engineer.
Cover the concrete with watering for curing within 24 hours after the pouring of concrete. The water to be used for curing shall
be the same with that is to be used for concrete mixing. The concrete shall not be watered on the day when the average
temperature is low.
Flow diagram for construction technology is stated below:
14.7 Construction Method for Brickworks
 Details of the work to be executed at each location shall be as per shop drawings or as directed by the Engineer.
 The method and equipment used for transporting and placing bricks and mortar shall be such as will not damage
the bricks or delay the use of mixed mortar.
 The bricks shall not be placed during rain sufficiently heavy or prolonged, which will wash the mortar from the bricks.
 All bricks to be used in the works shall be completely soaked in water for a minimum period of 24 hours before they
are used.
 All bricks shall be free from water adhering to their surface when they are placed in the brick work.
 Thickness of horizontal and vertical joints shall be as per the Drawings.
14.7.1 Machine made pressed bricks
 Machine made pressed bricks shall be of the size shown on the drawings and shall be standard commercial products
of approved manufacturers.
 The use of machine-made pressed bricks shall be approved by the Engineer prior to use in the Works.

 The crushing strength of bricks shall be tested in accordance with STP 7.8.4.
14.7.2 Patent Stone
 The Patent Stone Shall consist of Constructing 38 mm thick artificial patent stone (1:1.5:3) flooring with cement, best
quality coarse sand minimum F.M. 2.2 and 12 mm down well graded stone chips, laying the concrete in alternate
panels, compacting and finishing the top with neat cement and curing at least for 7 days in all floors
 The flooring shall be laid preferably not later than 24 hours after the floor slab is poured.
 When flooring is to be laid on an older concrete slab, the base surface shall be thoroughly cleaned of all loose
materials by stiff wire brush, roughened if seemed necessary and washed and soaked with clean water.
 Surplus water shall be removed and a dense cement grouting is applied to the surface before flooring is placed.
 The floor shall be divided into panels of specified sizes by means of wooden battens. The top of the battens shall be
at the level of the finished floor surface.
 The work shall be cured and protected from weather for at least 28 days immediately following the laying.
14.7.3 Mortar for Brick Masonry
 Unless otherwise specified on the Drawings, cement mortar for brick masonry works shall generally consists by
volume of one-part Ordinary Portland cement and four parts screened sand unless otherwise required by the
Drawings or instructed by the Engineer.
 Mortar shall be mixed in an approved mechanical mixer unless hand-mixing is specifically permitted by the Engineer
and in a manner as to accurately determine and control the quantity of each ingredient in the mortar.
 The water cement ratio in no case shall exceed 0.50 by weight, or as directed by the Engineer.
14.8 Construction Method for Plaster
14.8.1 Preparation of Mortar
 Unless otherwise specified on the Drawings, cement mortar for plaster work shall be same as brick masonry works.
14.8.2 Surface Preparation
 Before application of plaster, smooth concrete surfaces shall be roughened to provide key. The surfaces shall be
scrubbed clean of all loose materials and soaked with water and kept dampen for 2 hours before plastering.
 A neat cement coat shall be applied on all concrete surfaces before application of plaster.
14.8.3 Application of Plaster
 Plaster shall consist of a grout application and a finish coat, when applied direct to concrete surface. The under and
finish coats shall be applied without an interval.
 All edges and corners, unless otherwise shown on the Plans, shall be rounded or chamfered as directed by the
Engineer. All moulds shall be neat, clean and true to template.
 Plaster shall be floated and troweled to a true surface and tested frequently during the progress of the work with a
straight edge sufficiently long.
 Plaster shall be floated and troweled to a true surface and tested frequently during the progress of the work with a
straight edge sufficiently long.
 The plaster shall not be applied during rain sufficiently heavy or prolonged to wash the mortar when the works are
carried out under open sky.
14.8.4 Protection & Curing
 All plaster shall be kept moist throughout the progress of work and protected for a minimum 10 days immediately
following completion against harmful effects of weather by suitable covering when the location is exposed under the
open sky.

 During hot weather, all finished or partly completed works shall be covered or wetted in such a manner as will prevent
rapid drying of the plaster.
14.9 Construction Method for Fair Face Concrete
 Fair face reinforced cement concrete in any thickness and form in walls, columns, fins or railing & drop elsewhere in
all floors will be using cement (80% White cement and 20% Portland cement), clean sand (FM 2.20) and 20mm
downgraded stone chips with leanest permissible mix (1:1.25:2.5) and having minimum 28 days ultimate cylinder
crushing strength f'c= 28 MPa.
 Linonix Film / Marine Plywood or equivalent form work shall be used along with suitable chemical as per
manufacturer's requirement, including ribs in the form work for grooves in concrete moulds as per design.
 Centering, shuttering, proportioning the ingredients, mixing the aggregates with mixer machine, pouring,
compacting, by mechanical vibrators and tapered rods, levelling, curing, placing of anchor bolts, and other
embedded fixtures in position, etc. shall be completed in all aspect as per drawing, specification and direction of the
Engineer.
 All RCC surface to be fair face finished and smooth and no plastering will be permitted thereon. Fair face finished
shall be confirmed as per relevant section of respective sub-clause of specification.
15 STEEL STRUCTURE WORKS
15.1 Structural Steel & Other Materials
 The Structural Steel shall be ASTM A579 Grade 50. The tensile properties and chemical composition of A579 Grade
50 shall be the following:
Property A579 Grade 50
Tensile Properties:
Yield point, min.
50 ksi
Tensile strength, min.
65 ksi
Yield to tensile ratio, max.
--
Elongation in 8in, min.
18%
Chemical Composition:
Carbon
0.22% (maximum)
Phosphorous
0.04% (maximum)
Sulfur
0.05% (maximum)
 Galvanized decking panel should be according to ASTM A653, with minimum yield strength of 345 MPa.
 GI purlin & girt of any size conforming to "ASTM A653" grade 45, with a minimum yield strength of 310 MPa.
 Connection bolts of variable diameter with nut and washer should be according to "ASTM A325 Type 1 or equivalent”
with Fu =720 Mpa.
15.2 Fabrication of Steel Materials
The purpose of this process in order to describe the method of production, welding techniques, quality assurance and quality
checks made for the preparation and production.
The following methods will be carried out as follow:
 Cutting method
 Fit-up method

 Welding method
 Build-up Section
 Straightening method
 Drilling method
 Painting application method
 Packaging method
15.3 Cutting Method
15.3.1 Marking
Before cutting, the material will be marked as dimensions shown in shop drawings.
15.3.2 CNC Oxy-Fuel Machine
Oxy-Fuel is the standard cutting process for most steel. If the thickness of plate steel from 16mm to over shall be applied
CNC Oxy-Fuel cutting machine.
Fig 6.0: CNC Oxy-fuel cutting machine
15.3.3 CNC Plasma Machine
Plasma cutting is one of the most efficient means of cutting steel (see Figure 2). An electrical arc, which liquefies the steel,
superheats a high-pressure stream of gas, and the gas pressure “cuts” the steel. Plasma cutting applied for thickness under
10mm.
Fig 7.0: CNC Plasma cutting machine

15.3.4 Steel Plate Cutting Machine
Steel plate cutting machine is an effective way to cut straight line. It utilizer hydraulic “knife edge” to shear the steel where
the two edges meet. Shearing cutting applied for thickness under 16mm.
Fig 8.0: Steel plate cutting machine
15.3.5 Saw machine for H-shape
H-shape will be cut by saw machine with correct and low-waste result, no need to clean the surface. Item will be clamped by
hydraulic machine vise, “the saw” operated by its self-gravity and hydraulic piston.
Fig 9.0: Saw machine for H-shape
15.4 Fit-up Method
Structural members comprising many segments are subjected to fit-up and welding prior to assembling to build any fixture.
The inspection work must be performed strictly during the assembly process using tape measure, plumb-line, square,
protractor, welding gauge, automatic level etc.)

Banking bar to combine box column
with base plate
Method for fit-up banking bar with box column
Method for fit-up Banking bar with box column Banking bars were fitted-up in box column
Fig 10.0: Fit-up method
15.5 Welding Method
 Surfaces and edges to be welded shall be smooth, uniform and free from fins, tears, cracks and other discontinuities.
Surface shall also be free from loose or thick scale, slag rust, moisture, oil and other foreign materials. Surfaces
within 50 mm of any weld location shall be free from any paint or other material that may prevent proper welding or
cause objectionable fumes during welding.
 Machine flame cut edges shall be substantially as sooth and regular as those produced by edge planning and shall
be left free of slag. Manual flame cutting shall be permitted by the Employer/Engineer only where machine cutting is
not practicable.
 The welded temporary attachment shall be avoided as far as possible, otherwise the method of making any
temporary attachment shall be approved by the Employer/Engineer. Any scars from temporary attachment shall be
removed by cutting, chipping and surface shall be finished smooth by grinding to the satisfaction of the
Employer/Engineer.
 Welding shall not be done when the air temperature is less than 10 degrees Celsius. Welding shall not be done
when the surfaces are moist, during periods of strong winds or in snowy weather unless the work and the welding
operators are adequately protected.

 In assembling and jointing parts of a structure or of built up members, the procedure and sequence of welding shall
be such as to avoid distortion and minimize shrinkage stress.
Implement welding After completion of welding
UT inspection of Weld Weld Dimension inspection
Fig 11.0: Welding method
15.6 Built-up Section
15.6.1 Bevelling of Steel for built-up beam
a) Grinding
Grinding chamfer applied for plate thickness under 10mm.
b) Chamfering machine
Chamfering machine applied for chamfer plate thickness from 12mm to 20.
c) Semi-Automatic gas cutting machine
The bevels for welding shall be made by a semi-automatic gas cutting machine. Use for plate thickness above 22 mm.
15.6.2 Assembly of Built-up Beam
a) Assembly of T Beam
Flange plate No.01 is fed into the input roller conveyor and then web plate No. 02 is placed on top of the flange plate
No. 01, which will be centered and pressed under hydraulic system of Automatic Beam Assembly machine manually

regulated. Using MIG process tack weld will automatically be done between flange and web plate with 10mm long weld
at 300mm interval. (This tack weld is temporary only).
Fig 12.0: Assembly T beam
b) Assembly of H Beam
T beam is fed into the input roller conveyor and then flange plate No. 03 is placed on top of the T Beam, which will be
centered and pressed under hydraulic system of Automatic Beam Assembly machine manually regulated. Using MIG
process tack weld will automatically be done between flanges & web plate with 10 mm long weld at 300 mm interval.
(This tack weld is temporary only).
Fig 13.0: Assembly of H Beam
15.6.3 Welding of H Beam
Prior to welding, all joints shall be cleaned by air to remove possible inclusion of dirt and debris in the weld. MIG tack welds
will be removed by grinding machine.
Using SAW welding process with Automatic welding machine, welding on each side of H beam will be completed.
15.7 Straightening Method
After welding, if beam flanges are found out of fabrication tolerance, straightening shall be performed in Flange
Straightening Machine to rectify the distortion to meet the fabrication tolerance specified.
2
1
3

Fig 14.0: Flange Straightening Machine
15.8 Drilling Method
Hole for shapes and build-up sections will be made by Drilling machine and Magnetic machine.
 All holes shall be drilled except for secondary members such as floor plate, hand rails etc. Member which does not
carry the main load can be punched subject to the thickness of member not exceeding 12 mm for material.
 Holes through more than one thickness of material or when any of the main material thickness exceeds 20 mm for
steel conforming to IS: 2062 or 16 mm for steel conforming to IS:961, IS:8500, shall either be sub-drilled or sub-
punched to a diameter of 3 mm less than the required size and then reamed to the required size. The reaming of
material more than one thickness shall be done after assembly.
 Where several plates or sections form a compound member, they shall, where practicable, be firmly connected
together by clamps or tacking bolts, and the holes be drilled through the group in one operation. Alternatively, and
in the case of repetition work, the plates and sections shall be drilled separately from jigs and templates. Jigs and
templates shall be checked at least once after every 25 operations. All burrs shall be removed.
 In the case of repetition of spans, the erection of every span shall not be insisted upon, except where close tolerance
or turned bolts are used, provided that methods are adopted to ensure strict interchangeability. In such cases, one
span in ten or any number less than ten of each type shall be erected from pieces selected at random by the
Employer/Engineer and shall there be any failure of the pieces to fit, all similar spans shall be erected complete. In
the event of spans being proved completely interchangeable, all corresponding parts shall carry the same mark so
that sorting of the materials at Site is facilitated.
Fig 15.0: Drilling Machine
15.9 Painting Method
Surfaces of different members should be cleaned by modern shot blasting machine prior to painting. Painting of clean
surfaces should conform to the specifications and instructions from Engineer/Employer. Quality control check should be
done for product number, quantity and any visual deformations before and after painting.

15.10 Packaging Method
Depending on weight, size and type of material, any of four main method of packing stated below can be adopted:
- Bundle.
- Pallet.
- Steel frame.
- Wooden Case.
15.11 Erection of Structural Steel
 Contractor shall erect the structural steel, remove the temporary construction, and do all the work required to
complete the construction included in the contract in accordance with the Drawings and the Specifications and to
the entire satisfaction of the Employer/Engineer.
 Contractor shall submit a Method statement describing the methodology and procedure of erection, compatible with
the details of fabrication with the supporting design calculations for the same for Employer/Engineer’s approval.
 A detailed arrangement shall be prepared showing stage wise activities, with complete Working Drawings and
working phase wise instructions by the Employer/Engineer.
 The scheme shall be based on site conditions e.g. hydrology, rainfall, flood timings and intensity, soil and sub-soil
conditions in the river bed and banks, Minimum water depth, temperature and climatic conditions and available
working space and other conditions as directed by the Employer/Engineer.
 The scheme shall indicate precisely the type of temporary fasteners to be used as also the minimum percentage of
permanent fasteners to be fitted during the stage erection. The Working Drawings shall show clearly the temporary
jigs, fixtures, clamps, spacer supports, etc.
 Contractor shall supply all bolts, nuts, washers, etc. required to complete erection at site with an allowance for
wastage.
 Service bolts and nuts, ordinary platters, washers, drifts and all other temporary works necessary for erection of the
structural components shall be supplied by Contractor for which no extra payment will be made.
 Prior to physical commencement of erection, all equipment, machinery, tools, tackles, ropes, etc. shall be tested to
ensure their efficient working capacity. Frequent visual inspection shall be made by Contractor in vulnerable areas
to detect displacements, distress, drainages, etc.
 Deflection and vibratory tests shall be conducted in respect of supporting structures, launching truss as also the
structure under erection and unusual observations reviewed; looseness of fittings is to be noted.
 For welded structures, welders’ qualifications, certificates shall be submitted and approved by the
Employer/Engineer. Non-destructive tests of joints as per Employer/Engineer’s directives are to be carried out.
 Precision non-destructive testing instruments available in the market shall be used for noting various important
parameters of the structures frequently and systematic record is to be kept.
 The structure shall be divided into erectable modules as per the scheme and shall be approved by the
Employer/Engineer. This shall be pre-assembled in a suitable yard or platform and its matching with members of the
adjacent module checked by trial assembly before erection.
 The structure shall be set out to the required lines and levels. The stocks and masses are to be carefully preserved.
The steelwork shall be erected, adjusted and completed in the required position to the specified line and levels with
sufficient drifts and bolts. Packing materials are to be available to maintain this condition. Organized “Quality
Surveillance” checks shall be exercised frequently.

Fig 16.0: Crane Moving Direction Plan
Fig 17.0: Lifting & Placing of Structural Steel

16 PLACING OF TILES
16.1 Preparation of Mortar
 Unless otherwise specified on the Drawings, cement mortar for brick masonry works shall generally consists by
volume of one-part Ordinary Portland cement and four parts screened sand unless otherwise required by the
Drawings or instructed by the Engineer.
 Mortar shall be mixed in an approved mechanical mixer unless hand-mixing is specifically permitted by the Engineer
and in a manner as to accurately determine and control the quantity of each ingredient in the mortar.
 The water cement ratio in no case shall exceed 0.50 by weight, or as directed by the Engineer.
16.2 Fixing Method of Internal Wall Tiles
 Wall tiles shall be fixed by bedding in an approved adhesive on cement rendering.
 The rendering shall be applied in accordance with specification except where modified by the requirements of
relevant Clause.
 The rendering is to be in one coat, except where applied to metal lathing when two coats shall be to be used, and
be left with a wood float finish. It is to be as uniformly thick as apposite and not less than 8mm or more than 13 mm
thick in any part.
 The rendering is to be applied over differing structural materials.
 Where the tiling is to be bedded on a thin bed adhesive, the trueness of the rendering is to be such that when tested
with a 3 m straightedge, no gap exceeds 3 mm.
 Deviations from true or plumb in the surface of the rendering exceeding 6 mm shall be made good.
 Thin-bed adhesive shall not be used for fixing tiles with backs incorporating deep keys or frogs; for these thick-bed
adhesives shall be used.
 Tiles shall be to be set out before the work commences so that. Cut tiles shall be kept to a minimum and where they
do occur, shall be as large as possible.
 Joints shall be horizontal and vertical, with horizontal joints aligning in wall that shall be adjacent.
 Joints shall be to be carried through the rendering to the structural wall and shall be partially filled with approved
joint filler and finished flush with an approved sealant recommended by the manufacturer for the situation in which
it will be used.
16.3 Laying Floor Tiles by the Direct Mortar Bedding Method
 The concrete substrata to be tiled shall be brushed clean and dampened until absorption ceases and the finished
floor level is to be established by means of dots and rules.
 The mortar for bedding the tiles shall in ratio 1:4 by volume cement to sand, mixed in a mechanical mixer to a stiff
plastic consistency so that when tamped and fully, compacted into place free water does not bleed to the surface.
 The bedding mortar is to be laid on the concrete substrata 15 to 25 mm thick, except where tiles 10mm thickness or
less shall be used in which case the bedding is not to exceed 15mm, and shall be leveled and tamped with a
straightedge board.
 The tiles shall be to be soaked in clean water for 15 to 30 minutes before fixing and allowed
to drain for 10 minutes to remove all surplus water. Fully vitrified tiles do not require soaking.
 The bedding mortar is to be lightly dusted with grey cement sprinkled from a flour sieve and lightly troweled level
until the surface becomes damp.
 The tiles shall be laid on the bedding and tapped firmly into position with a soft faced mallet to ensure a true surface
and contact between the tiles and bedding is complete.
 Grouting and other requirements of the semi-dry-mix method described above (laying ceramic tiles) also apply to
the direct mortar bedding method.

17 PAINTING WORK
17.1 Water Repellent Coating
 The item shall consist of applying 2 coats of clear silicone water repellent on exposed brick or concrete surfaces
and cement plaster on wall, ceiling and elsewhere in accordance with relevant clause of Specification.
 Silicone water repellent shall consist of sodium silicate or other alkaline silicates based clear approved product
supplied in original sealed containers bearing the manufacturer's trademark.
 The application of water repellent coat shall strictly comply with the manufacturer's instruction. The application
shall preferably be carried out after a period of dry weather and before application, the surface shall be thoroughly
clean and dry.
17.2 Synthetic Enamel Paint
 The work covered under this item shall consist of applying 2 (two) coats of synthetic enamel paint of approved color
over a coat of primer on grille surfaces where necessary, in accordance with the requirements of the drawings and
specification.
 The enamel paint shall be of premium grade available locally and approved by the Engineer.
 Manufacturer's instructions for surface preparation and application of paint shall be followed.
 The color of the paint shall be in accordance with the drawings or as directed by the Engineer.
17.3 Wood Varnishing
 The work covered under this item shall consist of applying wood varnish with a matt finish, to wooden door frames
and doors in accordance with the requirements of this specification and the drawings.
 The manufacturer's instructions for surface preparation and application of the varnish shall be followed.
 Sample shall be inspected and approved by the Engineer before the full-scale work commences.
17.4 Plastic Emulsion Paint
 The work covered under this item shall consist of applying 2 (two) coats of plastic paint of approved color over a
coat of priming on plaster of interior wall or ceiling surface and where necessary as per direction of Engineer-in-
charge in accordance with Specification.
 The enamel paint shall be of brand approved by the Engineer or as specified in the specification.
 Manufacturer's instructions for application for paint shall be followed.
 The color of the paint shall be according to the direction of the Engineer.
 A sample shall be prepared at first and be inspected and approved by the Engineer before the full-scale work
commences.
17.5 Weather Coat
 On exterior surface applying as per manufacturer instructions three (3) coats of weather coat of approved quality
and color.
 The weather coat paint should be of standard brand and must be approved by the Engineer.
 The priming consists of appropriate brand as specified for the paint by the manufacturer and shall be applied
accordingly.
 Weather coat paint shall be applied in 3 coats alternately laid on vertically and horizontally on prime coat. Each coat
shall be perfectly dry before the succeeding one is laid over it.
 A sample area must be prepared first and got inspected and approved by Engineer before full scale work
commences.
18 GLAZING WORK
 Glass for all glazing work shall be of the best of imported sheet/float glass whether they are clean tinted/
frosted/figured/tempered or reflected as shown on the drawing or specified in the Bill of Quantities.

 Glass shall be free from bubbles, distortion and flaws of every kind.
 All glass shall be properly cut to fit and to leave a uniform space of 2mm all around the panes between the edge of
the glass and rivets.
 The glass shall be installed and secured properly with approved sealant in a good workmanship and manner as per
details shown on the drawings or specified by the manufacturer.
 Watertight installation of each piece of exterior glass shall be so installed with rivets, sealant, packing materials,
weep holes, tolerances etc. to ensure that it withstands normal temperature changes, loading and impact loading
without failure of any kind.
 Glass shall be cleaned with methylated spirit/glass cleaning solution.
19 INSTALLATION OF ALUMINIUM FRAME
 Aluminium sections for doors and windows shall be fabricated as per approved drawings.
 Materials shall be factory powder coated and delivered to site well protected to prevent any damage on any part or
powder coating.
 Painting and tiling work should be completed before installation of aluminium frames for doors or windows.
 Openings should be checked and verified with respect to the drawings prior to installation of aluminium frames.
 Approved backer rod and sealant should be filled around the frame.
 Accessories such as hinges, handle, lock, panic latch etc. shall be fixed and tightened properly.
20 INSTALLATION OF PLUMBING & FIRE FIGHTING SYSTEM
20.1 Plumbing & Drainage System
20.1.1 Water Pipeline Installation
 By means of string and chalk lines the actual pipe layout will be identified, to facilitate the installation of pipe supports
and anchors.
 Supports will be fixed in place according to the construction method. Supports will be arranged as near as possible
to pipe joints and any change in direction.
 Heavy in-line equipment will be supported independently.
 All pipework will be inspected for cleanliness prior to erection and cleaned as appropriate. Open ends will be covered
with plastic caps during construction and only removed when the adjoining section is installed.
 Coordinated service installations will generally run parallel to the alignment of the adjacent building surface's, and
as close to the construction as possible, sloping either towards a drain point or vented high point.
 Drain outlets will be provided at all low points of the system, air vents will be provided at high points where
appropriate.
 Pipework will rest freely on supports and be aligned prior to final connection to each other.
 Where possible all pipes of straight runs will be positioned so as to allow for pipes to be rotated for jointing.
 Pipework connections to pumps will be made by the designated flexible connection, where required. All branch
connections will be factory fabricated, and if site fabrication is necessary it will be of the same factory fabricated
standard.
 Valves and other in line equipment will be installed where indicated on the construction drawings. Installation will be
in accordance with the manufacturers recommendations and will be consistent with the flow direction of fluids.
 Flexible connection, anchors, expansion joints, will be installed where indicated on construction drawings.
 Where pipework passes through a designated fire barrier, it will be provided with an appropriate fire stop to the
approved detail as indicated on the construction drawings.
20.1.2 Sanitary Ware Installation
 Works areas will be inspected prior to works to ensure conditions are suitable for sanitary ware installation. The
sanitary ware will be re-inspected on removal from storage area, and on arrival at workface.

 Each item will be fixed using the propriety fixings as supplied by the manufacturer and in accordance with the
manufacturer’s installation instructions and respective specifications. Caution will be exercised when fixing to
finished surfaces.
 Final connections of services to sanitary ware will be made using joints/jointing compounds as recommended by the
manufacturer. Joints between finished surfaces and sanitary appliances will be pointed using a proprietary sealant
to ensure no crevices remain that might harbor dirt.
 After installation all sanitary ware will be suitably protected against damage and the permit to work system will be
maintained until handover and acceptance by the Engineer.
 Upon the completion of installation of the system or part thereof, the installed pipe shall undergo air pressure testing.
 On the completion of testing, Contractor will commence the flushing and disinfections to the pipe work. Testing and
commissioning will then proceed.
21 INSTALLATION OF ELECTRICAL SYSTEM
21.1 Cable Containment System
 All Electrical services cable containment and accessories (including cable trays, trunking, conduits and “back boxes”
for light switches & socket outlets etc.) will be installed at the correct elevations and locations, as indicated on the
approved construction drawings.
 Electrical services (including Cable trays, trunking, conduits and Luminaries etc.) shall be supported, independently
from any other services or fixtures, at intervals as defined in the specification, with approved type brackets.
 Connections shall be mechanically strong so that no relative movement can occur and shall be efficiently and
adequately bonded.
21.2 Cable & Wiring
 Prior to installation of cables and wiring, electrical services cable containment (including conduit and accessories),
will be cleaned of any debris, inspected and tested.
 Cables and wiring shall be installed as indicated on the Installation Drawings.
 The setting position of the cable drums shall be determined in consideration of the cable laying direction so that the
cable can be reeled out onto the containment without the cable being kinked.
 Cables will be fastened onto tray by means of purpose made cable ties.
 All cables prior to termination will be tested for continuity, correct destination routing – point to point, and insulation
resistance. Insulation of cables will be tested; core to core, each core to earth and all cores together to earth.
21.3 Lighting
 All electrical devices and accessories (including Luminaries, Light Switches and socket outlets etc.) will be installed.
 Cable lugs for connections of luminaries shall be used when necessary.
 Final connections and terminations will be made to equipment via appropriate accessories.
21.4 MCC, LT & HT Panel Installation
21.4.1 Motor Control Centre
 Pre-Installation Inspection shall be carried out for Motor Control Center prior to off-loading and positioning.
 The M.C.C. is free standing, self-supporting assembly, and will be bolted to the floor with anchor bolts ensuring the
assembly is horizontal and vertically in alignment as detailed on the Construction drawings.
 A thorough inspection will be carried out to determine that no foreign matter (tools, etc) have been left in the MCC
after field installation is completed. Particular attention will be paid to the Bus bar Compartment, ensuring it is free
of debris and moisture.
 All connections are checked for tightness/torque prior to the energization in accordance with the manufacturers’
recommendation.

21.4.2 LT Switchgear, HT Switchgear & Associated Equipment
This procedure defines the method that will be used to ensure the correct installation of the equipment listed below:
 Main Switchboards
 Lighting and Power distribution Panel Board Assemblies
 Emergency Lighting Distribution Panel Board Assemblies
All works relating to the above items will be carried out in accordance with the manufacturers’ recommendations, and in
compliance with the contract documents and general specification. Before any item of equipment is installed, a visual
inspection will be carried out on that equipment.
Prior to sitting and erection / assembly of switchgear equipment, inspection will be carried out to ensure no damage to cubicle
or electrical components has been sustained.
Precise setting out and positioning of the electrical switchgear will be adhered to as shown on the construction drawings, and
further on-site consideration will be taken into account with respect to maintenance / inspection, termination of conductors.
Also, consideration will be given to facilitate possible future additions of electrical switchgear.
All switchgears and associated items will be installed to manufacturers specification and secured accordingly with correctly
sized nuts and bolts or tapped out metal work. Self-tapping screws will not be used. Wall / Floor anchors will be used as
deemed appropriate for various items of equipment. Locking washers will be used on all screws / bolts.
Where status indicator lamps are fitted, these will be inspected for the correct mode of operation and color-coding. Terminal
blocks for the live conductors will be covered with an appropriate warning label and separated from other terminal blocks per
partitions. Cable segregation will be adhered to throughout the installation.
Before energizing any part of the electrical distribution system takes place, functional testing will be completed and the testing
results should be acceptable, all terminations are checked and secured, all covers and safety shields are in place.
22 INSTALLATION OF FIRE FIGHTING SYSTEM
22.1 Fire Fighting System
 Before the installation commences all builder’s works and plinths, waterproofing work inside pump room areas will
be completed.
 For the installation of Fire Pumps, the inertia bases will be checked to confirm correct positioning and installation.
The fire services pumps will be fixed onto the inertia bases and base elbows fitted as required. Pump alignment will
be checked.
 Pipework vibration isolators will be fitted on the suction and discharge side of each pump. Each pump will be fitted
with an isolating valve and strainer on the suction side of the pump, and an isolating valve and non-return check
valve on the discharge side.
 The pipework assembly shall be separately supported and anchored such that no load is imposed on the pump
assembly.
 Each pump will be securely fixed to the slab prior to any pipework connections.
 Pipework from the safety valve will be run to low level so as to ensure a safe discharge at floor level.
 For the installation of the sprinkler, fire hydrant and hose reel, Contractor will commence the pipe work installation
for these system on the completion of the structure.
 Pressure testing of individual systems will be on a zone by zone basis (sprinkler pipe in floor by floor basis, fire
hydrant and hose reel in vertical riser zoning).
23 INSTALLATION OF FIRE DETECTION SYSTEM
 Prior to the commencement of installation, the locations of all items of equipment and the routings to be followed for
the cable containment system will be identified on Installation Layout Drawings.
 The installation of AFA equipment in respective room requires careful consideration regarding their relative
positioning.

 To limit the coupling of transit EM field from noisy equipment, equipment should be installed as far as possible from
switched loads such as relays, contactors, lifts, chillers and variable speed motor drives.
 All wiring systems shall be properly installed in conduit and in compliance with relevant clause of specification.
 After the installation of cables, detection devices, alarm, control modules, fire control panels will be installed.
 Detection, actuation, alarm, and control systems shall be installed, tested and maintained in accordance with the
requirement of specification.
24 CONSTRUCTION METHOD FOR TAXIWAY
24.1 Sub-base Construction
 Any rust, holes, defects or soft, yielding places which occur in the under lying layer/layers by reason of any improper
drainage condition, traffic or hauling over the-same, or for any other cause, shall be corrected and compacted to
required density and stability and shall comply with the smoothness requirements of the relevant clauses of
specifications for sub-base course.
 The aggregate shall be evenly spread on the subgrade by the use of approved, self- propelled spreading machines
or power graders capable of placing the materials true line and grade without damage to the subgrade.
 The sub-base materials shall be spread and compacted to specified thickness.
 Compaction shall be carried out using heavy power rollers, heavy rubber-tired rollers or plate compactors.
 Compaction of the layers shall immediately follow the spreading operation and rolling or compacting shall begin at
one edge of the course.
 During compaction, any irregularities that develop in the surface of the sub- base course shall be corrected by
loosening the surface, adding or removing materials and re- compacting until the surface presents a smooth regular
appearance.
24.2 Aggregate Base Course Construction
 Surface defects in the under lying layer/layers will be corrected.
 Aggregate base material shall be at or near optimum moisture content at the time of loading for transportation.
 The aggregate base course materials shall be spread in courses which will not exceed 75 mm once compacted.
 The aggregate base course shall be compacted to the full width shown on the drawings.
 Either extra material shall be placed and compacted with the base to provide edge support and to allow full
compaction.
 Compaction of the course shall immediately follow the spreading operation. Rolling or compacting shall begin at the
edges of the course.
24.3 Bituminous Carpeting Construction
24.3.1 Cleaning Surface
 Immediately before applying the bituminous material, all loose dirt and other objectionable material shall be removed
from the surface with a power brush.
 When so ordered by the Engineer, a light application of water shall be made just before the application of bituminous
material.
24.3.2 Application of Bituminous Material
 Bituminous material shall be applied at the rate, or rates, either shown in the Contract Documents or as directed by
the Engineer.
 The rate sprayed can be verified using STP 10.12.
 This will usually range from 1.0 to 2.5 liters per sq. meter, and at a temperature within the range called for in the
specification for the particular material being used.

 Any prescribed application shall be divided into two applications when necessary to prevent bitumen flowing off the
surface, and additional bituminous material shall be applied where surface conditions indicate it to be necessary, if
the Engineer so directs.
 No further courses shall be applied until the prime coat has dried and the solvent evaporated.
 When so directed, the prime coat shall be applied in lanes of approximately one-half or less of the width of the
completed surface.
 A lane of prime coat shall be applied, allowed to penetrate for not less than 48 hours, then covered with blotting
material if required, and opened to traffic before bituminous material is applied to the adjacent lane.
 In covering the first primed lane, a strip at least 200 mm wide shall be left uncovered where it joins the second traffic
lane to permit an overlap of the bituminous material.
 The surface of structures and trees adjacent to the shall be as being treated shall be protected in such manner as
to prevent their being splashed or damaged.
 No bituminous material shall be discharged into a borrow pit or gutter.
24.3.3 Spreading of Course Aggregate
 The coarse aggregate will be spread on a surface over which a bituminous base coat will have been previously
applied.
 The coarse aggregate shall comprise not less than 85% by volume of the aggregate applied in this course.
 Spreader boxes of an approved design or self-propelled spreading and leveling dices or approved hand methods of
spreading and levelling will be required.
 Where curbs or approved spreading and levelling machines shall be not used, adequate lateral support for the
bituminous macadam base course shall be provided either by the use of formwork or by the compaction of roadway
to their final shape and density.
 Where formwork is used, proper steps be shall be taken to return their required shape and compaction when forms
shall be removed.
 Prior to rolling starts, the spread aggregate shall be checked for conformity to crown and profile with a template cut
to the cross section of the finished course.
 The ends of the template shall be supported by a suitable device in proper reference to tightly a stretched grade
lines offset at the edges of the course.
 Thin, flat or oversized aggregate detrimental to compacting or checking cross-section shape conformity shall be
removed.
 The aggregate shall have a uniform distribution of size and all patches or undersized material shall be removed and
replaced before any rolling starts.
 Aggregate for filling or choking the course shall be applied with approved mechanical chip spreaders or approved
hand methods.
24.3.4 Preliminary Rolling
 The coarse aggregate shall be rolled until it is compacted, so that the surface is smooth and conforms to the
established profile grade and cross sections.
 Rolling shall begin at the edges of the course, and when the course is not being built between curbs, the roller shall
be run forward and backward along the edges until the backing and the edges of the course shall be firmly bound
together.
 The rolling then shall progress gradually toward the center until the entire course has been thoroughly compacted.
 The preliminary rolling shall stop when the surface of the course will support the pressure distributor, bitumen
sprayer, water tanker or other heavy construction equipment without appreciable displacement.
 The surface of the course shall then be checked for conformity to the grade profile and cross- section.
 Any irregularities shall be loosened and reshaped and again roiled as required above.
 Aggregate that crushes under the roller so as to prevent the free and uniform penetration of bituminous material
shall be removed and replaced by suitable aggregate.

24.3.5 Bituminous Material Application
 No bituminous material shall be applied when the aggregate in the course is damp or wet.
 Without disturbing the rolled aggregate course, the bituminous material shall be uniformly applied by means of
pressure distributors or other means approved by the Engineer.
 The bituminous material shall be heated in suitable appliances so designed as to heat the entire mass evenly with
an efficient and positive control of the heat at all times.
24.3.6 First Penetration, Filling and Rolling
 Immediately after the bituminous material is applied, type A or B size choke aggregate shall be evenly spread over
that shall be of the course.
 The specific size will be determined by the Engineer and shall be applied at the rate approved by the Engineer. All
choke aggregate shall be spread with approved mechanical spreaders.
 Following the application of the choke aggregate, the surface of the course shall be dragged with
an approved fiber broom drag so designed as to secure even distribution of the aggregate.
 The course shall then be thoroughly rolled with steel-wheeled rollers and vibrated.
24.3.7 Second Penetration, Filling and Rolling
 Following the completion of the first penetration, filling, and rolling, the bituminous material for the second course
shall be applied.
 The surface of the course shall then be broom dragged and rolled in the same manner as after the first application
of bituminous materials.
 The surface course shall be tested with a straight edge 3000 mm long applied parallel to the center line of the
pavement and any irregularities, 10 mm or more, shall be corrected as directed.
24.3.8 Protection of Structures from Bituminous Material
 When bituminous material is being applied, the surfaces of all structures shall be protected by a satisfactory method
or device to prevent their surface from becoming marred by the operation.
24.3.9 Surface Tolerances
 The final roadway surface shall not vary more than 10 mm from a template cut to the cross section of the surface of
the course nor 10 mm from a 3000 mm straight edge applied parallel to the central line of the course.
 Irregularities which may develop after the initial rolling shall be corrected by loosening the surface and adding new
material or removing material such irregularities to the surface tolerances required.
24.3.10 Bituminous Tack Coat Construction Methods
 Immediately after cleaning the surface, bituminous material shall be applied at the rate directed by the Engineer, but
not to exceed 0.45 liters per sq. meter and at the temperature within the specified range.
 The tack coat shall be applied only when the surface is dry. The tack coat material shall.be uniformly distributed over
the surface without streaking.
 Quantities shall not deviate more than 10% from the quantity prescribed by the Engineer.
 Quantities outside the specified tolerances shall be adjusted by the Contractor at his own expense, to the satisfaction
of the Engineer.
 The surfaces of structures and trees adjacent to be as being treated shall be protected in such manner as to prevent
their being splashed or damaged.
 No bituminous material shall be discharged into a borrow pit or gutter.
 The Engineer may direct that emulsions shall be diluted with clean water in order to control the rate of spread.
 This shall be done at the Contractor's expense. After the tack coat is applied the Contractor shall protect it from
damage until the surface course is placed.

 No surfacing layer will be done to be placed unless the tack coat is in a satisfactory condition to receive it and as
such the tack coat shall be applied only so far in advance of surface course placement as is necessary for this to
occur.
25 INSTALLATION OF HVAC SYSTEM
25.1 Chilled Water System
After completion of supporting plinths/I-beams c/w necessary delivery access, chillers can be delivered and positioned on top
of vibration isolator and construction can be scheduled as follows:
 This shall be done at the Contractor's expense. After the tack coat is applied the Contractor shall protect it from
damage until the surface course is placed.
 Installation of chilled water pipework (including vent pipes) from chilled water pumps to chiller plant complete with
necessary valves and fittings.
 Cable tray and trunking installation between chiller control switchboards to chiller plant
 Installation of trunking / cable tray for power to chiller control switchboard.
 Laying of power cables interconnecting switchboards and chillers.
 Installation of local small wirings and insulation test.
 Water leakage test for the pipe before insulation.
 Installation of the associated control panel for Chillers.
 Terminations of HVAC Electrical Systems.
 Fixing of local distribution base boxes and local small wirings followed by insulation tests.
For the installation of chilled water pumps, the inertia bases of the pumps will be checked to confirm correct positioning and
installation. The checking of the free impellor rotation shall be performed prior to installation. The pumps will be securely fixed
in the inertia bases and base elbows fitted are required. Manufacturers specific instructions will be followed. Pump alignment
will be checked. Pipework vibration isolators will be fitted on the suction and discharge side of each pump. Each pump will be
fitted with an isolating valve and strainer on the suction side of the pump, and an isolating valve and non-return check valve
on the discharge side. The pipework assembly shall be separately supported and anchored such that no load is imposed on
the pump assembly. Upon completion of the system, and after all pressure tests have been carried out, the system will be
commissioned, if necessary, water and power supply are available.
25.2 Ductwork
 Ductwork will generally be installed in sections using duct hoists and scaffolding. Screwed drop rods will have thread
adjustment in either direction after leveling of ductwork and associated plenum box’s etc.
 Ducts will be supported within 300mm of mating flanges or joints. Ductwork passing through non fire rated walls and
floors will be adequately supported on either side.
 Ducting will be installed allowing sufficient space for expansion/contraction and thermal insulation.
 Ductwork will be assembled using a proprietary flanging system.
 All connections to plant and equipment will be made using flanged joints.
 All square bends will have turning vanes.
 Silencers, fire dampers, balancing dampers & other plant items will be installed as per construction drawings, and
will be supported adequately.
25.3 Air Handling Unit (AHU)
 AHU’s will be moved into position using purpose made rollers or skates.
 Units will be carefully plumbed and aligned by use of blocks and shims.
 After alignment is completed it will be ensured that vibration isolators are of the correct deflection.

 Whilst making the final connections to the units it will be ensured that the pipework is adequately supported
independently of the unit.
25.4 Fan Coil Units
 Necessary hangers and brackets for FCU will be prepared as per approved details.
 FCU will be hanged into its proper level ensuring that the condensate will flow thru the condensate drainpipe.
 Level of the FCU will be ensured that it is within tolerance as specified prior to the tightening of the lock nuts.
25.5 Fans
 All necessary assembly operations will be carried out before installation of any fan.
 Care will be taken to ensure that all fastenings are tightened securely and that any lifting points provisions will be
used correctly.
 Checking of the fan’s free rotation and air flow direction will be verified prior to installation.
 Support frames for wall or ceiling mounted fans will be securely fixed to building structure, adequate space will be
provided for movement of fans during operation.
 A minimum gap of not less than 50mm is required between fan collar and ductwork before the installation of final
flexible connections.
 On completion of the pipe work, the chilled water pipe will be flushed and chemically treated such that the chilled
water pipe is free from impurities and harmful material.
 Final connections for air handling units and fan coil units will be installed in accordance with the master program.
 Preliminary water and air balancing will be carried at the final stage of the program to ensure that the flow rate in
individual system meets the design requirement.
26 INSTALLATION OF ELEVATORS
26.1 Hoisting of Major Equipment
 The hoisting of major equipment shall be carried out with the use of tested and certified loading apparatus. Method
statement, apparatus configuration shall be submitted for comments/approval prior to the event.
 Apparatus shall be strategically placed on the main structure in suitable locations to gain access to the landing levels.
26.2 Receipt of Lift Shaft
 An initial inspection on the advised handover date, any rectification works required (if any) shall be pointed out
immediately for rectification works.
26.3 Plumbing of Lift Shaft
 Plumbing templates shall be manufactured on the site to suit condition in accordance with the approved shop
drawings.
 The templates shall be installed at the top and bottom most position of each shaft, plumb lines shall then be
supported and weighted to the templates.
26.4 Distribution / Location of Major Equipment Prior to Installation
 The lift machine or control panel shall be hoisted to the top landing level, the detail of this distribution shall be
submitted separately and in advance of delivery for final approval or site coordination.
 The rest such as entrances, sills and architraves etc. shall be distributed to each landing through the lift shaft.
26.5 Shaft Component Installation
 With the shaft completely plumbed and rectified (if necessary), installation of counter weight guide rail fixing brackets
shall be mounted and located at the dimension shown on the approved shop drawings.

Method statement

Recommended

Recommended

More Related Content

What's hot

What's hot (20)

Similar to Method statement

Similar to Method statement (20)

More from shahriermahmud13

More from shahriermahmud13 (6)

Recently uploaded

Recently uploaded (20)

Method statement