7/27/2019 IR Post Tension Works

1/2

INSPECTION REQUEST FORM FOR POST-TENSIONING WORK NO:

Unless otherwise approved,this inspection request form shall be submitted during

the daily morning meeting among LTA,Contractor and QP(S)

Contractor: Project:

To: Date:

LTA Time:

The work described below has been inspected by our Site Engineer and is complete

and ready for your inspection. A checklist is attached overleaf.

Location

Checked and Requested By:

Chainage

Activity

Drawings Used for Construction

Other DescriptionContractor's PM Name & Signature

INITIAL INSPECTION DECISION BY QP(S)

We have inspected the above referenced works and found them acceptable. You may proceed.

However, please return the completed checklist upon completion of the remaining work.

You cannot proceed. Please carry out corrective works as noted on the checklist and

submit a fresh request for inspection.

Other comments:

RTO/RE Name & Signature/ Date

FINAL INSPECTION DECISION BY QP(S)

work approved to start:______________________

LTA

_______________________________

_________________________________________QP(S) Name &Singnature/Date

work completed on:_______________________

The above process for request for inspection of work by Contractor and approval by QP(S) is noted.

LTA's representative/Date/Time

SAMWOH CORPORATION PTE LTD SK E&C

ER296-CONSTRUCTION AND COMPLECTION OF SENTOSA

GATEWAY TUNNEL FROM TELOK BLANGAH ROAD TO KEPPEL

ROAD / KAMPONG BAHRU ROAD/ LOWER DELTA ROAD AND

ASSOCIATED ROAD WIDENING WORKS INTERCHANGE

The meeting noted that the information provided by the Contractors is adequate/not adequate*

QP(S) may proceed Request Rejected

*delete where appropriate

7/27/2019 IR Post Tension Works

2/2

CHECKLIST FOR POST-TENSIONING WORK

Location:

S/No Description of Works Checked by Confirmed

Contractor QP(S)

1 Check before casting:1.1 Check milling certificate of prestressing cable

1.2 Check number of cables

1.3 Check profile and alignment of tendon (no kink)

1.4 Check sheaths free from damage

1.5 Proper coupling of sheathing

1.6 Ensure tendons firmly and rigidly fixed

1.7 Check anchorage details (i.e. coil reinforcement and recesses.)

1.8 Check proper fixing and water-tightness of grout vent

1.9 Use request form for concreting work

2 Check before tensioning operation:

2.1 Availability of full instructions issued by designer (e.g. sequence of

tensioning, maximum jack pressure, theoretical extension,

corresponding tolerances on such extension.

2.2 Check calibration of jacks and pressure gauges

(Submit calibration cert. of jacks and pressure gauges)

Reference/Serial No. of jacks and gauges:

___________________________________________________

2.3 Minimum concrete strength specified is achieved

2.4 Ensure precast member free to move during stressing.

2.5 Ensure area directly behind stressing jacks are cleared

2.6 Display warning signs (e.g. DANGER - Tensioning I n Progress)

3 Check during tensioning operation:

3.1 Record forces and corresponding extensions

plot on graph

3.2 Compare actual and theoretical extensions of

each tendon within +/-5% tolerance

4 Check after tensioning operation:

4.1 Visual inspection of concrete surface for cracks

4.2 No grouting, cut off tendons before Project

Officer's approval

5 Check sufficient temporary traffic devices if lane

closure is required

6 Others

NO:

Date/Time: Chainage: