CD 05 MOS RE01

THE D1MENSION PROJECT MS001-Fire sprinkler Tank RESPOSE ON COMMENT OF THE ENGINEER RESPOSE ON COMMENT OF THE ENGINEER shop drawing THAM & WONG COMMENT CONTRACTOR RESPONSE 02 REV.01 C

Trang 1

THE D1MENSION PROJECT MS001-Fire sprinkler Tank

THE D1MENSION PROJECT

CDCC JSC CATDONG CONSTRUCTION JOINT STOCK COMPANY

BLOCK B

METHOD OF STATEMENT FOR CONSTRUCTION OF FIRE SPRINKLER TANK

CDCC SUBMISSION No SR-001

REVISION No.01 Aug 2017

Trang 2

3 Work Procedure and its Quality Control Management

3.1 Procedural Flowchart 3.2 Quality control

4 Form work Rebar Insatllation and concreting

4.1 Form work 4.2 Rebar 4.3 Concreting

5 Risk Assessment (Safety, Environment Control)

4.1 Safety Control 4.2 Environmental Control Attachments

Attachment 1 : Formwork shop drawing Attachment 2 : Formwork calculation sheet Attachment 3 : Reinforcement detail shop drawing Attachment 4 : Concreting sequence

Attachement 5: Sika dur 731 & Water bar Sika V20 catalogue Attachment 6 : Schedule

Trang 3

RESPOSE ON COMMENT OF THE ENGINEER

shop drawing THAM & WONG COMMENT CONTRACTOR RESPONSE

02 REV.01 CONCRETING SEQUENCE To clarify the type of water stop to be use

Sika waterstop type V20as specified in revised shop draws CONCRETING SEQUENCE

03 REV.01 CONCRETING SEQUENCE For what purpose Noted Deleted

04 REV.01 CONCRETING SEQUENCE To provide formwork for opening access and formwork dismantle

Noted Please see detail 01 in revised shop draws FORMWORK

06 REV.01 CONCRETE CORING PLAN Should be coring instead of hacking Noted deleted

07 REV.01 FORMWORK What is vibration method? For this concrete wall?

This segment doing by hand use stick to thrust into concrete then after close formwork we use hammer to knock outside

08 REV.01 FORMWORK Blow up detail for formwork at this point

Noted Please see detail 01 in revised shop draws FORMWORK

09 REV.01 FORMWORK Show detail of tie rod with consider water tightness

Noted Please see detail 1A : tie rod fix tightly with nut since they same diameter that prevent water leakage

10 REV.01 SHOP REINFORCEMENT Drilled rebar for what purpose? To clarify the space of rebar Noted deleted

11 REV.01 SHOP REINFORCEMENT Detail of this connection please provide Noted Please see detail 02 in revised shop draws

SHOP REINFORCEMENT

12 REV.01 SHOP REINFORCEMENT

Any vertical point will be provide for tank wall due to separated casting or casting in one operation Please clarify and provide necessary detail at

function

Noted Please see detail 03,

04, 05, 06, 07 in revised shop

draws SHOP REINFORCEMENT

Trang 4

Material will be obtained from below sources which meet requirement of specification

Trang 5

Preparation Work ( Equipment , material deliver

to site )

Drawing / MOS approval

Taking over gridline /axis

Setting baseline of watertank parameter on basement 1( top )& 2( bottom); Sunray to chipping concrete of basement 1 on top of new concrete

base slab

Rebar horizontal of wall

Concreting curing

Remove form work , fix

defect

Trang 6

3.2 Quality control

3.2.1 Material Inspection

3.2.1.1 Rebar and concrete

 Rebar delivery will check tag & deliver docket/ CO against approved rebar source Vinakyoie catalogue

 Water bar delivery will check mark/code and CO of manufacturer

 Concrete : Concrete deliver will check slum & taking sample or compressive strength testing

Based on the type of concrete structure type, the suitable concrete class will be supplied as follows:

Sampling for determination of concrete strength shall be done based on the following frequencies

 For continuous pours: 20 m³ < batches volume <100 m³, 3 random samples shall be taken from which not less than six (6) specimens shall be tested 28 days

CONCRETING

4.1 Form work

Form work will be made by plywood and be fixed into vertical segment with horizontal stud steel shape 50x50x1.8mm , vertical wale steel shape 40x80/50x100x1.8 mm and tie rod d16 which embedded in concrete then cut later on

A support system by tube steel at bottom and middle of wall

Please see detail in formwork shop drawing :Attachment 1

The work ability of formwork system has been calculation sheet following TCVN standard 4435-1995 Please see attached calculation sheet : Attachment 2

Cube Strength Test (MPa)

Slump (mm)

Trang 7

4.2 Reinforcement

All rebar must be free form dust , oil or other harmful chemical

There are 4 types of dia for rebar :

-D16 for anchor rebar mounted to existing slab

-D8 for stiffener of vertical rebar

-D10 for horizontal rebar

-D12 for vertical rebar The lap length at join will be 30dia

Detail reinforcement shop drawing pleasesee : Attachment 3

will be casted 2 time :

 1st : for base slab and 150mm height of wall

 2nd : from 150mm to top of wall

Concrete placing by horizontal pump and worker

Casting sequence , Please see : Attachment 4

Slab & wall curing :

By spray water on the surface of structure right after casting 8hrs & 3 continuous days after remove form work

Testing :

During transportation, protect specimens with suitable cushioning material such as cloth, foam, paper, etc to prevent damaged Prevent moisture loss during transportation by wrapping the specimens with plastic or wet burlap

Concrete specimens will be tested at 28 days passing from the date of casting All specimens testing shall be conducted by approved testing laboratory

5 RISK ASSESSMENT (SAFETY, ENVIRONMENT CONTROL)

5.1 Safety Control

Trang 8

All mixer trucks will be equipped with flashing lights and audible reversing alarms

Personal Protective equipment At all times

Trang 9

ATTACHMENT 1 FORMWORK SHOP DRAWING

Trang 10

KS.LIM CHIN KEONG

CONSTRUCTION (NEW PROPOSAL)

Trang 11

KS.LIM CHIN KEONG

Trang 12

ATTACHEMENT 2 FORMWORK CALCULATION SHEET

Trang 13

Structural Calculation for formwork - Wall

CDCC JOINT STOCK COMPANY

27No.30 Str., Linh Dong Ward , Thu Duc District , HCMC

Project : THE SHINING

Item : WATER TANK

Calculation for : WALL

I Model of form :

Span (cm)

48 100 100

II Load applied on Slab :

Detail of Load Unit Quantity

Safety coefficient 1.3

Total (P)=(Pd+Pc)*safety coefficient kg/m2 3,206

III Checking ply wood for form :

Ply-wood thk 18mm, geometry properties :

According to Vietnamese Standard-TCVN 4453 : 1995

Load due to Vibration of Pumping : Pd = 400 kg/m2

Load due to Vibration of Concreting & Vibrating Machine :

Pc = δ.(0.27.V + 0.78).K1.K2

δ : Unit of Concrete

V : Velocity of pouring

K1 : Slum; k2 : factor of concrete temp

STRUCTURAL CALCULATION TO FORMWORK

Trang 14

Structural Calculation for formwork - Wall

IV Checking studs :

Steelbox 50x50x1.8mm, geometry properties :

VI Checking Tie Rod :

Use Tie Rods

Trang 15

ATTACHEMENT 3 REINFORCEMENT DETAIL SHOP DRAWING

Trang 16

KS.LIM CHIN KEONG

Trang 17

ATTACHEMENT 4 CONCRETING SEQUENCE

Trang 18

1 STAGE CONCRETING ST

KS.LIM CHIN KEONG

Trang 19

KS.LIM CHIN KEONG

Trang 20

ATTACHEMENT 5 SIKADUR 731 & SIKA WATER BAR V20 ( WATER STOP)

CATALOGUE

Trang 21

Product Data Sheet

Edition 08,2004

Identification no 4.2 001Version No 03

Sikadur® 731

Sikadur ® 731

Thixotropic 2-component epoxy resin adhesive

Description Sikadur 731 is a solvent-free,Thixotropic 2-component adhesive and

repair mortar based on combination of epoxy resins and speciallyselected high strength fillers Its pasty consistency allows an easy andversatile application

Uses Q Thin firm bonding

Q Can be used on concrete, steel ,ceramics ,iron, aluminum, wood,glass ,polyester &epoxy

Q Concrete repairs

Q Blow hole filling

Q Starter bar adhesive

Q Crack and surface sealing

Advantages Sikadur 731 is an extremely practical product that offers many

advantages to the user

Q Easy to apply

Q Suitable application for both dry and damp surface

Q Non sag product ,even at high temperature

Q Shrinkage free hardening

Q Excellent adhesion to concrete and many other materials

Q High early strength

Q Components of different colours (Mixing control)

Q High abrasion resistance

Certificates International and local test report are available

Product Data

Storage conditions Above +5°C,max +25°C,dry

Shelf life 12 months when unopened and stored in dry place above 5oC and max

25oC

Trang 22

Health and Safety information

Ecology In liquid state it is water poluting

Transportation Class Comp A –Non Hazardous, Comp –B –Hazardous -Refer to Safety Data Sheet

Important notes Product may cause skin irritations Wear gloves and goggles If the

material is accidentally splashed into the eyes, flush immediately withwater and seek medical attention without delay

Legal Note The information, and, in particular, the recommendations relating to the application and

end-use of Sika products, are given in good faith based on Sika’s current knowledge and experience of the products when properly stored, handled and applied under normal conditions In practice, the differences in materials, substrates and actual site conditions are such that no warranty in respect of merchantability or of fitness for a particular purpose, nor any liability arising out of any legal relationship whatsoever, can be inferred either from this information, or from any written recommendations, or from any other advice offered The proprietary rights of third parties must be observed All orders are accepted subject to our current terms of sale and delivery Users should always refer to the most recent issue of the Technical Data Sheet for the product concerned, copies of which will be supplied on request.

PLEASE CONSULT OUR TECHNICAL DEPARTMENT FOR FURTHER INFORMATION.

Technical Data

Specific gravity ~ 1.7 kg/ltr (mixed)

Mixing ratio Comp A : B = 2 : 1 parts by weight

Elongation at break@ 7days 0.41%

Bond strength 2days >7N/mm² meets ASTM C881 –02 requirement

(Slant Shear test)

14 days >10N/mm² meets ASTM C881 –02 requirement

Max.1cm vertical application

Application

Surface preparation All surfaces must be clean, free from standing water and all loosely

adhering particles Cement laitance should be removed, by mechanicalmeans (i.e sand blasting)

Mixing Mix both components together for at least 3 minutes with a mixing paddle

attached to a slow speed electric drill (max 500 r.p.m.) until a smoothconsistency and an even grey colour of the mixture is obtained

Application When using as a thin film adhesive ,apply the mixed adhesive to the

surfaces with a trowel spatula or glove protected hand When applying as

a repair mortar, take into account any formwork that may be required ondamp surfaces ensure that the material is well rubbed in

Cleaning Clean all tools and equipment immediately after use with Thinner C

Trang 23