Table of contents1. General.2. Management Organization Chart3. Sequence of works.4. Formwork design.5. Construction joint treatment.6. Re bars fabrication & setting.7. Installation of embed item.8. Placing of concrete.9. Compaction of concrete.10.Removal of formworks11.Curing12.Protecting against raining13.Electricity 14.Equipment & Manpower

AppendixA. First floor planB. Typical formworks & Scaffolding arrangement.

1. General

This method statement describes how we carry out the concrete works of column in

building works.

Concrete class shall be approved ready-mix concrete B25 (Grade 35NM/m2)

Please refer to Appendix A for first floor plan of three main building.

2. Management Organization Chart

2.1 Project Manager

• To oversee and control all aspects of the Piling activities, and dictate schedule

requirements

• To ensure that all field staff are fully aware of the requirements of this method

statement, and that these requirements, in all respects, are fully implemented.

• To ensure that Safety and Environmental procedures, particularly, are in place

before activity commences, and strictly complied with, throughout the duration

of concreting works.

Mr. T. UCHIDAProject Manager

Mr. A . IKEGAMIConstruction

Manager

Mr. A.M. CabonceQA/QC Manager

Mr. K.MiyaraChief Engineer

Mr. P. C. TRUNGChief site Engineer

Mr. Tran Thanh MinhSite Engineer

Mr. Dang Trong DungSite Engineer

Sub Contractor Sub Contractor

Mr. N.N.HaiHSE Manager

Mr. Hoang HungSite Engineer

Sub Contractor

2.2 Construction Managers, directly reports to Project Manager.

• To oversee all construction works, with respect to schedule.

• To ensure that all field staff follow the requirements of this method statement,

including quality control and HSE.

2.3 Chief Engineer, reports to Construction Manager

• To ensure that all relevant preparations have been made.

• To ensure that all provisions of this method statement are followed.

• To ensure that all quality inspection is carried out and record taken, if

required.

• To ensure that all necessary safety and environmental precautions are in

place and that all workers under their direct control are fully aware of all

procedure requirements

• To control execution of the entire activity

2.4 Site Engineer

• To assist Chief Engineer to control the Subcontractor for all activities relative

to this method statement.

• To ensure safe working environment at all times, during Subcontractor

execution of concreting works.

2.5 Surveyor

• To give control points & grid line to Subcontractor for concreting works.

• To supervise Subcontractor and conduct survey checks from time to time.

• To carry out all surveying work and to ensure all required records are taken

and maintained.

2.6 QA/QC department

• To oversee construction activity with respect to quality control.

• To ensure quality procedures has been followed.

Construction Joint treatment

• To ensure that all required inspections have been carried out and that

records, if required have been taken and properly stored.

• Advise the laboratory and Site Engineers to control the quality of works.

2.7 Health, Safety & Environmental department

• To monitor that all the working activities are executed in accordance with site

safety procedures.

• To ensure that precautions with respect to Environmental matters have been

implemented on site.

3. Sequence of works.

Setting Formwork & Form oil sheathing

Setting Temporary Staging for casting

Placing Concrete

Inspection for casting concrete

Assembling re bar

Inspection of re bar

4. Formworks Design

Formwork shall be set in correct position following specification and the approved

structure drawing. Temporary opening will be provided at bottom & middle of column for

cleaning, inspection & casting purpose.

Please refer to Appendix B for detail of formworks for each building.

Approved form oil will be applied to form surface prior to installation of form.

5. Construction joint treatment

All construction joints will be chipped to remove cement sand surface to make rough

surface.

In some cases, approved retarder for concrete surface will be used as another method

to make construction joint properly.

6. Rebar fabrication & setting

Approved re-bar type will be delivered to site and it will be inspected & tested prior to

use.

Re-bar shall be cut and bent according to the approved schedule at the site workshop

and transport to site by truck. After delivery to the site re-bars shall be fixed according to

specification and approved drawings by Engineer or Consultant.

Rebar shall be inspected by Engineer or Consultant before setting of formworks.

Approved concrete spacer shall be used; its concrete grade shall be 35 MN/m2.

Stripping of form works

Curing for Concrete

7. Installation of embed item

All the embed item showing in the drawings shall be firmly installed in correct position.

8. Placing of Concrete

Approved ready-mix concrete will be transported from batching plant to the site by mixer

truck. During transportation & waiting time the concrete shall be kept continuously

agitated.

From mixer truck concrete will be poured to casting location by concrete pump or by

bucket. The height from discharge position to casting level shall not be over 1.5m.

On each concreting day and for each grade of concrete mix, samples shall be taken.

When samples are taken at sites, samples shall be taken for every 24m3 of concrete or

part thereof, of each grade of concrete.

Minimum requirement of sample

- Each concreting day

- Each part of structure (each building)

- After filling above condition, samples shall be taken for every four mixer or

agitating truck (20~24m2).

9. Compaction of Concrete.

Concrete after pouring to position shall be compacted by immersion vibrator. Proper

staging for vibration works will be arranged.

Wooden or rubber hammer also will be used as external vibrator.

Please refer to Appendix B for scaffolding arrangement.

10. Removal of formworks

Form works removal shall be accordance with specification.

All tie rod holes & defects on surface will be repaired following approved method.

11. Curing.

After removal of form works, concrete shall be cured minimum of 6 days according to

TCXDVN 391:2007– Requirements for Natural Moist Curing, apply for Area C of Viet

Nam.

Curing of concrete will be carried out by spraying water periodically to the surface of the

newly placed concrete. Jute bag or nylon sheet shall be used to cover the concrete

surface for keeping wet.

Water to be used for curing and cleaning works is portable water from local authority.

Approved curing compound also can be used in several cases.

12. Protecting against raining.

Against raining, plastic sheet shall be prepared to cover over the concrete area before

concreting.

13. Electricity

Electricity will be supplied by generators on site.

14. Equipment & Manpower

a)Equipment

Equipment Unit Quantity

Mixer truck Nos 04Vibrator Nos 03Concrete Pump No 01Water Pump 2 HP No 01Water Pump 1HP No 01Generator 15KVA No 01Generator 10KVA Nos 02Bucket Nos 10Showel Nos 05Trowel Nos 05

b)Manpower

Description Unit Quantity

Supervisor No 01

Surveyor Nos 02Foreman No 01Electrician No 01Worker Nos 10

APPENDIX A

FIRST FLOOR PLAN

APPENDIX B

TYPICAL FORMWORKS &

SCAFFOLDING ARRANGEMENT