METHOD STATEMENT FOR CENTRAL CONTROL BUILDING

Comment Response Sheet (CRS)
Project Title

Van Phong 1 BOT Thermal Power Plant Project

Document Title

METHOD SATEMENT FOR CENTRAL CONTROL
BUILDING

Document Type

For Approval

Document No

VP1-0-L4-C-UCB-10042

Returned Status

AC

Prepared by

CRS No

VP1-0-L4-C-UCB-10042-C-CRS

CRS Issued Date

09/06/2020

Engineer

Construction

Review
Date

Status O/C *

Remarks

No.

1

Section/
Page
1

Owner’s Comment

Response to Comment

04/05/2020
General comment:
- This identified MS did not cover all activities to
build a completed building.
- The constructor can refer to a general MS to
carry out a specific activity, but he must state out

clearly what he will refer to, so that Owner can
understand a whole procedure.

- This MS is for Lot4’s scope of work. The other

04/05/2020

O

scope of work (i.e. air conditioning, fire fighting

28/05/2020

C

04/05/2020

O

28/05/2020

C

L4

work) will be submitted by the other
consortium members.
The work sequence is mentioned in this MS.
However, reflecting the current structure work’s
starting situation, this MS is focused on

describing the earth work and structure work,
so the MS of subsequent works will be

28/05/2020
Closed
2

2

04/05/2020
Backfilling for foundations ?
Please state the works

submitted later.
- Well noted and applied in this MS
Backflling for foundation is added

28/05/2020
Closed
Page 1 of 6


Comment Response Sheet (CRS)
3

2

04/05/2020
- HVAC works ?
- Plumbing?

- Finishing works ?
...etc.
-> Please state cleary the scope of works and
interface management for this building

- This MS is for Lot4’s scope of work. The other

04/05/2020

O

scope of work (i.e. air conditioning, fire fighting

28/05/2020

C

04/05/2020

O

28/05/2020

C

04/05/2020

O

28/05/2020

C

04/05/2020

O

28/05/2020

C

work) will be submitted by the other
consortium members and this MS is focused
on the earth work and structure work, so the
MS of subsequent works will be submitted
later. The interface among the work shall be

4

3

28/05/2020
Closed

properly managed in accordance with the

04/05/2020
How about the works of:
masonry, doors/windows, painting, tiling, ,
finishing .etc..?

Please clarify

Finish work shall be conducted with approved
material and refer to the Method statement for
finish work which will be submitted later

Consortium Agreement and site situation.

28/05/2020
Closed
5

4

04/05/2020
Are there equipment operators?

Well noted and added in this MS Rev.B

28/05/2020
Closed
6

5

04/05/2020
Is there bituminous coating?

Well noted and added in this MS Rev.B

28/05/2020
Closed

Page 2 of 6


Comment Response Sheet (CRS)
7

6

04/05/2020
Lack of finishing works

Well noted and added in this MS Rev.B

04/05/2020

O

28/05/2020

C

04/05/2020

O

28/05/2020

C

04/05/2020

O

28/05/2020

C

04/05/2020

O

28/05/2020

O

09/06/2020

C

28/05/2020
Closed
8

6

04/05/2020
Please identify approved document number

Well noted and added in this MS Rev.B

28/05/2020
Closed
9

8

04/05/2020
- Method statement for General concrete should
be stated as a reference method to be applied for
concreting works.

Well noted and added in this MS Rev.B

28/05/2020
Closed
10

27

04/05/2020
This is not Job safety analysis. Doosan to provide
the risk assessment and JSA based on Doosan
risk management procedure

28/05/2020
OPEN. Please refer to detail comment at risk
assessment table

Well noted and added in this MS Rev.B

Job safety analysis and risk assessment is
separated as article no 9.3.4 and 9.3.5.
Job safety analysis is modified

09/06/2020
Closed

Page 3 of 6


Comment Response Sheet (CRS)
11

34

04/05/2020
General comment for all layout drawings:
- Lot 4/Subcon to present the interface
management to avoid clashing to other structures
that may occur during construction time:
+ The plan of excavation, access road, earth
transportation, the potential of clashing to other
structures.
+ The plan/side drawings of concrete supplying,
pumping for foundations, for columns, slabs ....
+ Schedule of major activities should be
presented and followed Level 3 schedule.

The space between turbine bldg and CCB is
narrow, with consideration of this, North side of
External scaffolding will be dismantle proper time
to avoid the clash to TG bldg. structural steel
work. The interface will be managed more
obviously during the execution stage in reference
with the approved DWG. The other interface also
will be managed as per site situation.

04/05/2020

O

28/05/2020

C

04/05/2020

O

28/05/2020

C

04/05/2020

O

28/05/2020

C

All activity will be followed or managed in
accordance with L3 schedule

28/05/2020
Closed
12

66

04/05/2020
Typo

Noted and revised.

28/05/2020
Closed
13

67

04/05/2020
General comment, please check for all calculation
sheet:
- Force to layer 2 should be the concentrated
force from layer 1
- Support points are tie-rod positions

- After we conformed from third party calculation
the force from layer1 is a uniform load to layer 2
beam, so that we suggest to keep same
calculation that we submitted
- We will revised

28/05/2020
Closed

Page 4 of 6


Comment Response Sheet (CRS)
14

73

04/05/2020

Noted and revised.

Typo

04/05/2020

O

28/05/2020

C

28/05/2020

O

09/06/2020

C

28/05/2020

O

09/06/2020

C

28/05/2020

O

09/06/2020

C

28/05/2020
Closed
15

28

28/05/2020
Once the MDL is updated, please identify the
number of referent document.

Well noted. The document number will be
updated after updating MDL.

09/06/2020
Closed
16

29

28/05/2020
- Once the MDL is updated, please identify the
document number of reference.
- Ms of finishing work will describe detail step of
each specific activity. This MS should state the
sequence of finishing works in generally, for
example finishing work will be carried out from
inside to out side or from top to down... and which
one is first, which one is second...to avoid
interface and double work.

Well noted. The document number will be
updated after updating MDL.

The finish work will be start from 1st floor, 2nd and

ground floor to 3rd floor.
The detail sequence of finishing work will be
described later with consideration of interface
with other works.

09/06/2020
Closed
17

38

28/05/2020
Please address where is risk assessment and
where is Job safety analysis in this document
based on Doosan's risk assessment procedure?

Job safety analysis and risk assessment is
separated as article no 8.3.1 and 8.3.2.
Job safety analysis is modified

09/06/2020
Closed
Page 5 of 6


Comment Response Sheet (CRS)
09/06/2020
No appendix was found.
Additional Notes (if any)
* O - Open, C – Closed

18

2

Well noted and added in this MS Rev.D

09/06/2020

Closed
O

Page 6 of 6


AP

APPROVED
Approved

AC

APPROVED WITH COMMENT
Contractor to revise the correction and resubmit

NA

NOT APPROVED
Revise the correction and resubmit before proceeding

RE

REVIEWED
For Approval

Information acknowledged with no comment

RC

REVIEWED WITH COMMENT
Information acknowledged with comments

Note: Approval or comment does not relieve the Contractor of
all obligations covered under contract

Discipline: Civil
18 Jun 20
Date:

D

12-Jun-2020

For Approval

J.H CHOI

K.S KIM

Y.J LEE

C

29-May-2020

For Approval

J.H CHOI

K.S KIM

Y.J LEE

B

15-May-2020

For Approval

J.H CHOI

K.S KIM

Y.J LEE

A

23-Apr-2020

For Approval

J.H CHOI

K.S KIM

Y.J LEE

REV

DATE

DESCRIPTION

Approved

Checked

Prepared

OWNER

VAN PHONG POWER COMPANY LIMITED
PROJECT

Van Phong 1 BOT Thermal Power Plant Project
Status
□Approved
□Approved with Comment
□Not Approved
□Reviewed

OWNER’S ENGINEER
Pöyry Switzerland Ltd.
EPC CONTRACTORS

IHI–TESSC–CTCI–DHI CONSORTIUM

PROJECT DOCUMENT No

REV

VP1-0-L4-C-UCB-10042

D

DOCUMENT TITLE

METHOD STATEMENT FOR CENTRAL CONTROL BUILDING
EPC

EPC DOCUMENT No.
VP1-0-L4-C-UCB-10042

Doosan Heavy Industries and Construction

REV
D

Page | 1

METHOD STATEMENT FOR CENTRAL
CONTROL BUILDING

TABLE OF CONTENTS
1. PURPOSE.............................................................................................................................3
2. APPLICATION……............................................................................................................3
3. REFERENCE CODE & STANDARD...............................................................................3
4. MANPOWER & EQUIPMENT.........................................................................................3
4.1 MANPOWER…………………………………………………………………………….3
4.2 EQUIPMENT…………………………………………………………………………….4
5. RESPONSIBILITIES...........................................................................................................4
6. PROCEDURE AND SEQUENCE.......................................................................................5
6.1. Survey & Setting-out…………………………………………………………………7
6.2. Excavation work………………………………………………………………………7
6.3. Forms/Shuttering……………………………………………………………………..8
6.4. Reinforcement Fixing…………………………………………………………………8
6.5. Concreting……………………………………………………………………………..9
6.6. Concept and Sequence of Building Structure ………………………………………9
6.7. Walkway protection and external scaffolding………………………………………….25
6.8. Waterproofing work ………..…………………………………………………………..26
6.9. Backfill work …………………………………………………………………………...……..27
6.10. Plumbing work ………………………………………………………………..…………….27
6.11. Finish Work ……………………………………………………………………..…………..29
6.12. Concrete Repairing work ………………………………………………………..…………29

7. INSPECTION AND TESTING...........................................................................................29
8. ENVIRONMENT, HEALTH AND SAFETY (EHS).........................................................30
APPENDIX 1: METHOD STATEMENT DRAWING
APPENDIX 2: CALCULATION FOR FDN
APPENDIX 3: CALCULATION OF FORMWORK FOR BEAMS 800X1100

APPENDIX 4: CALCULATION OF FORMWORK FOR BEAMS 700X800
APPENDIX 5: CALCULATION FOR SLAB
APPENDIX 6: CALCULATION OF FORMWORK FOR COLUMNS
APPENDIX 7: CATOLOG OF SCAFFOLDING

Page | 2


METHOD STATEMENT FOR CENTRAL
CONTROL BUILDING

1.0 PURPOSE
The purpose of this Method Statement is to describe the methodology for structural work of Central
Control Building and to details out the steps to be taken in meeting the technical requirements of Van
Phong 1 thermal power plant project.
Plant Project/Project:

Van Phong 1 BOT Thermal Power Plant Project

Company/Owner:

Van Phong Power Company Limited (VPCL)

Contractor:

EPC

2.0 APPLICATION
This Method Statement is applicable to the implementation of Lot4’s construction scope of work for
Central Control Building.

3.0 REFERENCE DOCUMENTS AND STANDARDS
-

ACI 347-Guide to formwork for concrete

-

ACI 304-Guide for measuring, mixing, transporting, and placing concrete

-

ACI 301-Specifications for structural concrete for buildings.

-

ACI 318-Building Code Requirements for Structural Concrete.

-

ACI-305R-Guide to hot weather concreting.

-

VP1-0-L4-C-GEN-10007 MS for General concrete work.

-

VP1-0-L4-C-GEN-10011 ITP for General concrete work

-

VP1-0-L4-C-GEN-10008 MS for Excavation and backfilling works.

-

VP1-0-L4-C-GEN-10012 ITP for Excavation and backfilling works

-

VP1-0-L4-C-GEN-10027 MS for Water proofing of underground concrete structures

-

VP1-0-L4-C-GEN-10028 ITP for Water proofing of underground concrete structures

-

VP1-0-L4-C-GEN-10025 MS for Concrete repair work

-

MS for Painting work (this will be submitted later)

-

MS for General finishing work (this will be submitted later)

-

MS for Plumbing work (this will be submitted later)

-

Design Drawing VP1-0-L4-A-UCB-02101 ~ VP1-0-L4-A-UCB-02214

Page | 3


METHOD STATEMENT FOR CENTRAL
CONTROL BUILDING

4.0 MANPOWER AND EQUIPMENT
4.1 MANPOWER.
4.1.1

Indirect Labor

No

Position

Quantity

1

Site Manager

1

2

Site Engineer

3

3

Quality Manager

1

4

QC Engineer

2

5

Surveyor

1

6

Safety Manager

1

7

Safety Supervisor

1

4.1.2.

Direct Labor

No

Position

Quantity

1

Foreman

3

2

Carpenter

18

3

Rebar worker

20

4

Concrete worker

12

5

Scaffolding worker

20

6

Common worker

15

7

Equipment operators

7

4.2. EQUIPMENT.
No

Position

Spec/Capacity

Remark

1

Excavator

1.2 m3

1

2

Bending machine

2.5 kw

1

3

Cuting machine

2.5 kw

1

4

Welding machine

3
Page | 4


METHOD STATEMENT FOR CENTRAL
CONTROL BUILDING

5

Vibrator

6

Automatic level

7

Total station

8

Crane

9

Hand tool

10

Dump truck

1.1 kw

4

Sokia B40

2

Nikon NPL-362

1

15T

1
Lot

12.5T

5

5.0 RESPONSIBILITIES.
-

It is overall responsibility of Project Manager to organize resources prior to perform construction

activities as per project specification in compliance with the quality, schedule & safety
requirements.

-

EHS Manager will ensure in coordination with Site Engineer that all measure/construction taken
shall be maintained till completion of job.

-

Site management will manage the construction work, progress, measures and quality on the site.
Supervising the construction situation, ensuring the progress and quality of the project. Providing
solutions to the situations arising on the site.

-

Site Engineer will control construction activities are executed according to the relevant project
specification in compliance with the quality, schedule & safety requirements.

-

The QC Inspector will ensure that the work is executed according to the requirements of quality
dossier are fulfilled.

-

It will be ensured that all works are performed safely according to the attachment.

-

The relevant Supervisor will ensure that the work is carried out in accordance with this method
statement and project specification.

Page | 5


METHOD STATEMENT FOR CENTRAL
CONTROL BUILDING

6.0 PROCEDURE AND SEQUENCE
-

Concrete Works as per approved MS for General Concrete Works.

Constrction
Activites

Quality Control
Activities
Transportation & storage
of material

Survey & setting out

Lean concrete

Procedure and sequence of
general concrete

Concrete placing

Removal of formwork

Curing

Bituminous Coating

Finishing

Page | 6


METHOD STATEMENT FOR CENTRAL
CONTROL BUILDING

-

Sequence of Structunal work for CCB
SITE PREPARATION

SURVEY

EXCAVATION & Lean Con’c

CONCRETE WORK FOR
GROUND BEAM

BACKFILLING

CONCRETE WORK FOR

FOUNDATION

CONCRETE WORK FOR
SUPER STRUCTURE

CONCRETE WORK FOR
GROUND FLOOR

FINISHING WORKS

6.1. Survey & Setting-out
- The site is to ensure that the instruments such as level and total station used in setting-out has a valid
calibration certificate and checks are made at site to ensure that these instruments are in a good

Plan Coordinate

Control Point
X (m)

Elevation Plan
Y (m)

PBM-1

865.428

-28.469

11.674

PBM-2

257.056

-21.985

11.629

PBM-3

623.486

-72.326

PBM-4

1191.393

-796.445

802.023

-264.679

6.178

802.049

445.297

6.213

BL-1
BL-2
working order.

- Construction work must be surveyed and setting out based on the project coordinate system

Page | 7


METHOD STATEMENT FOR CENTRAL
CONTROL BUILDING

6.2. Excavation & backfill work (See appendix 1 – Method statement drawing)
- Excavating soil with slope around 1:0.5 by excavator combined with manpower to design level.
-

After excavation work is done, surveyors shall check the ground's elevation.
- Leveling and compaction to ensure the design elevation and make the surface smooth.
- Excavation work will be carried out according to the VP1-0-L4-C-GEN-10008 MS for Excavation
and Backfilling Works, VP1-0-L4-C-GEN-10012 ITP for Excavation and backfilling works.

- Start excavation work from axis C4 and finish at axis C1.

Excavation Plan

Typical Section

For water pumping plan see appendix 1- Method statement drawing

Page | 8


METHOD STATEMENT FOR CENTRAL
CONTROL BUILDING

6.3. Forms/Shuttering
- Formwork shall be designed and constructed in accordance with ACI 347 or as approved by the
Engineer. Approval shall be required before formwork construction commences. (See attached
calculation).
- Forms shall be so designed, ties and supported so that they will not deflect or bulge during placement
and compaction of the concrete. It shall be sufficiently tight to prevent loss of mortar.
- The capacity of form and frame system is calculated following APPENDIX for reference.
- For calculation of form work see APPENDDIX attached
6.4. Reinforcement Fixing
- Type of rebar: with deformed bar we use grade CB 400-V, fy=400Mpa, for wesh bar we use grade
CB 500-V, fy=500Mpa. Rebar material shall be submitted and get approved from owner before used
- Rebar will storage in workshop and put on support of timber or pipe to keep distance with ground and
cover with plastic sheet
- Rebar will be cut and bending after conformed design drawing and bar bending schedule. Contractor
will use cutting machine and bending machine capacity compliance with bar diameter and standard of
bar bending. Rebar after fabrication will transport to construction site by truck crane.
- Rebar will install follow approved drawing and standard of lap length. Bar chair type will apply
follow standard and bar bending schedule between bar layer where request to control position of rebar
- The black steel wire will use to fix of rebar, steel wire with double folded to ensure the firmness of
the connection. After install rebar, the concrete spacer will be applied before start formwork, concrete
spacer will be cast with same grade with concrete structure
- The fixing of reinforcement and formwork activities may be carried-out in parallel or alternatively
the sequence can be interchanged and adequate supports are provided to avoid any movement of

reinforcement during the concreting operations.
- All steel reinforcement shall be installed, positively, secured and supported in strict accordance with
the approved drawing and bending schedules.

6.5. Concreting
- Site Engineer along with the Site QA/QC Engineer and Site Foreman will carry-out the following
checks to ensure smooth concreting operations.
- Concrete work will be carried out according to the VP1-0-L4-C-GEN-10007 MS for General
concrete works, VP1-0-L4-C-GEN-10011 ITP for General concrete work
- Designated access routes for concrete supply will be prepared and traffic control measures
implemented. The proper access must be organized to enable a continuous transportation of the
concrete during the entire period of pouring so that the required temperature of concrete pour will be
maintained.

Page | 9


METHOD STATEMENT FOR CENTRAL
CONTROL BUILDING

6.6. Concept and Sequence of Building Structure
6.6.1. Construction work for foundation and stump columns.
- Construction of foundation and pedestal will be carried out step by step from Axis C4 to Axis C1.
- The rebar of pedestal is to be properly fixed with the wire or re bar to prevent the collapse.
- See the appendix 1 – Method statement drawing.

Typical detail formwork of Foundation.

Typical detail formwork of Stump columns.

Page | 10


METHOD STATEMENT FOR CENTRAL
CONTROL BUILDING

Step 1: Concrete Work for Foundation Axis “C4” Line.

Step 2: Concrete Work for Foundation Axis “C3” & Stump columns Axis “C4”
Page | 11


METHOD STATEMENT FOR CENTRAL
CONTROL BUILDING

Step 3: Concrete work for Foundation Axis “C1-2/CA-D” & stump columns Axis “C3”

Step 4: Concrete work for Foundation Axis “C1-2/CE-G” & Stump columns Axis “C1-2/CA-D”
Page | 12


METHOD STATEMENT FOR CENTRAL
CONTROL BUILDING

Step 5: Concrete work for & Pedestal Axis “C1-2/CE-G”
6.6.2 Construction work for ground floor
6.6.2.1 Construction work for ground beam
- After bituminous painting, filling up to the bottom of girder, concrete work will be carried out.
Girder will be constructed in each area.
- See appendix 1 – Method statement drawing.

Page | 13


METHOD STATEMENT FOR CENTRAL
CONTROL BUILDING

Step 1: Concrete work for Girder Axis C3-4/CA-E

Step 2: Concrete work for Girder Axis C3-4; E-G
Page | 14


METHOD STATEMENT FOR CENTRAL
CONTROL BUILDING

Step 3: Concrete work for Girder Axis C1-3; A-D.

Step 4: Concrete work for Girder Axis C1-3; D-G.
Page | 15


METHOD STATEMENT FOR CENTRAL
CONTROL BUILDING

6.6.2.2 Construction works for lean concrete
- After backfill ground floor, Lean concrete will be carried. Ground slab will be done after finish
concrete for second floor.

Step 1: Lean concrete for ground floor axis 1-2; A-G

Step 2: Lean concrete for ground floor axis 2-4; A-G
Page | 16


METHOD STATEMENT FOR CENTRAL
CONTROL BUILDING

6.6.3 Construction works for Superstructure
6.6.3.1 Construction works for columns
- After lean concrete for ground floor, concrete works for columns will carried out.
- See appendix 1 – Method statement drawing.
- See appendix 2 – Calculation for Column.

Typical detail for Formwork of Columns

Step 1 Concrete work for Columns Axis C3 & C4 (5 columns for 1 time)
Page | 17


METHOD STATEMENT FOR CENTRAL
CONTROL BUILDING

Step 2 Concrete work for Columns Axis C1 & C2 (5 columns for 1 time)
6.6.3.2 Construction works for slap and beam
- See appendix 1 – Method statement drawing.
- See appendix 3 – Calculation for Beam.
- See appendix 4 – Calculation for Slab.
- See appendix 3 – Catalog of Scaffolding.

Page | 18


METHOD STATEMENT FOR CENTRAL
CONTROL BUILDING

Scaffolding formwork for 1st floor

Section “C1” line for scaffolding formwork 1st floor.

Page | 19