SterlingPT Pvt. Ltd, previously known as Post Tension Services Pakistan Pvt. Ltd. (PTSP) specializes in design and installation of Post Tensioning (PT) systems throughout Pakistan. SterlingPT is an engineering franchise of Sterling Engineering and Design Group Ltd. (www.segoc.com). A USA based company with extensive Post Tensioning (PT) design and construction experience. SterlingPT typically reviews the structural design of the project with structural engineer and determine the feasibility use of PT. If PT is deemed feasible, SterlingPT submits the proposal defining in detail the SterlingPT scope of work. The quote typically includes providing the cost for PT cables, all accessories, PT System installation and its stressing. The design of the PT is in accordance with relevant ACI and IS codes. Typically, SterlingPT requires 3 to 4 weeks to deliver Post Tensioned cables after receipt of order. We have been working in Pakistan since 2009 and have done number of successful projects. Our experience to date in the Pakistan market has yielded some following valuable information. . PT reduces self-weight of structure, . Cost of reinforcement is typically up to 25% less than that of conventional reinforcing, . Formwork can be stripped after 7days, . PT cable strength is four times greater than that of conventional re-bar strength, . Effective in Parking Structures, Residential and Industrial Structures, Walls, Columns and Slabs,

1. Najeeb Centre
Level 2, 172-B
Block 2
PECHS
Karachi
Pakistan

2. Introduction to
Un-Bonded Post-Tensioned System
A complete Solution package in Un-Bonded PT
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3. What is Pre-stressing…
A complete Solution package in Un-Bonded PT
• It means that the structural member is
stressed internally before it is subjected to
design loads.
• The Pre-stressing is done by applying an
external force using a steel cable assembly,
placed in the body of the structural member.
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4. A complete Solution package in Un-Bonded PT
Pre-stressing
The design concept is to put a
management of various stresses at every
cross section of the structure. This can be
done by a careful placement of
cables/tendons, through which an external
force can be applied to the structure
resulting in the final stresses in structure at
or below the desired level
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5. A complete Solution package in Un-Bonded PT
Pre-stressed concrete Terminology
Main differences
Stress sequence
Pre - Before concrete has reached to desired strength
Post - After concrete has reached to desired strength
Transfer of force
Bonded - Through bond between concrete and the cable
Un-bonded - Mechanically using special anchor plates
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6. A complete Solution package in Un-Bonded PT
Types of Post-Tensioning System
Bonded - Where the Pre-stressing steel strand is bonded to
the concrete after it is tensioned by injecting cement grout
inside of a duct in which the tendon is placed.
Unbonded - Where the Pre-stressing steel strand is
prevented from bonding to the concrete and thus free to
move relative to the concrete. The force is transferred to
the concrete by the MECHANICAL ASSEMBLY only
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7. A complete Solution package in Un-Bonded PT
Advantages of Post-Tensioned
•Allows larger column spacing
•Reduces Structural Depth of members
•Results in larger floor to ceiling height
•Greater Deflection Control
•Reduces Structural Costs
•Un-cracked section at all times
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8. A complete Solution package in Un-Bonded PT
HOW PT WORKS…
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9. A complete Solution package in Un-Bonded PT
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10. A complete Solution package in Un-Bonded PT
Un-bonded Tendon Applications
•Parking Structures
•Hotels
•High-rise Apartments & Condos
•Office Buildings
•Ground Supported Foundations
•Typically where large bays or spans are desired
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11. A complete Solution package in Un-Bonded PT
Essential Elements of PT
The cable or Tendon
Fpu = 250 ksi, 270 ksi and 300 ksi (1
ksi = 6.89 Mpa)
Seven wire strand
Low relaxation
The cable or tendon come in various
diameters
3/8 Inch, 1/2 Inch, 0.6 Inch
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12. A complete Solution package in Un-Bonded PT
COMPONENTS & FIXTURES
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13. A complete Solution package in Un-Bonded PT
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14. A complete Solution package in Un-Bonded PT
Anchor Plates
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15. A complete Solution package in Un-Bonded PT
Friction Wedges
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16. A complete Solution package in Un-Bonded PT
Friction Wedges- Locking Arrangement
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17. A complete Solution package in Un-Bonded PT
Friction Wedges, Anchor Plate & Tendon – Locking Arrangement
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18. A complete Solution package in Un-Bonded PT
CONSTRUCTION SEQUENCE
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19. A complete Solution package in Un-Bonded PT
Cables Prepared at the workshop for a particular project
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20. A complete Solution package in Un-Bonded PT
Cables Delivered to the Jobsite
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21. A complete Solution package in Un-Bonded PT
Fixing of the Pocket formers
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22. A complete Solution package in Un-Bonded PT
Installing Anchorages
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23. A complete Solution package in Un-Bonded PT
PT Cables are planned and prepared with
identity markings at workshop before it is
transported to the site for installation.
Our system offers the technology with
excellent quality assurance at all the
stages
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24. A complete Solution package in Un-Bonded PT
Tendon Identification Code for Quick and Precise Installation
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25. A complete Solution package in Un-Bonded PT
Tendon Laying
We care for the safety of our equipped
persons for the installation of PT System.
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26. A complete Solution package in Un-Bonded PT
Inspecting the Tendon Profile
A complete supervision and onsite inspections that
leads to desired quality control.
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27. POST TENSIONING DETAILS
A complete Solution package in Un-Bonded PT
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28. A complete Solution package in Un-Bonded PT
Tendon Layout with a Wide Panel
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29. A complete Solution package in Un-Bonded PT
Tendon Layout around Column
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30. A complete Solution package in Un-Bonded PT
Tendon Layout around Column
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31. A complete Solution package in Un-Bonded PT
Tendon Anchorage Zone - Re-bar Details
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32. A complete Solution package in Un-Bonded PT
Tendon Anchorage Zone - Re-bar Details
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33. A complete Solution package in Un-Bonded PT
Tendon Anchorage Zone - Re-bar Details
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34. A complete Solution package in Un-Bonded PT
Tendon live ends kept for stressing after pouring
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35. A complete Solution package in Un-Bonded PT
Tendon Profile – Typical view
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36. A complete Solution package in Un-Bonded PT
Tendon Layout with nominal reinforcement – Typical view
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37. A complete Solution package in Un-Bonded PT
Tendon Layout with nominal reinforcement – Typical view
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38. A complete Solution package in Un-Bonded PT
Regent High Street Mall- Flat Plate with Cut out, Surat, India
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39. A complete Solution package in Un-Bonded PT
Deep Beam - PMT Workshop Building, Pune, India
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40. A complete Solution package in Un-Bonded PT
Tendon Layout with Electrical Ducting - Commercial Complex, Baroda
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41. Add Tendon Anchorages – Preparation & Placing
A complete Solution package in Un-Bonded PT
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42. A complete Solution package in Un-Bonded PT
Tendons with Reinforcement as per Seismic detailing
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43. A complete Solution package in Un-Bonded PT
Tendons with Reinforcement as per Seismic detailing
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44. Tendons with Reinforcement as per ductile detailing
A complete Solution package in Un-Bonded PT
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45. A complete Solution package in Un-Bonded PT
PT Beam with conventional Slab
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46. A complete Solution package in Un-Bonded PT
Intersecting Beams without Columns
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47. A complete Solution package in Un-Bonded PT
Cables kept at construction joint
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48. A complete Solution package in Un-Bonded PT
Cables for stressing at construction joint
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49. A complete Solution package in Un-Bonded PT
Cables for stressing at construction joint
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50. A complete Solution package in Un-Bonded PT
Post Tensioning in Parking Garage
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51. A complete Solution package in Un-Bonded PT
Post Tensioning in Parking Garage
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52. A complete Solution package in Un-Bonded PT
Parking Garage, Denver - Colorado
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53. A complete Solution package in Un-Bonded PT
Thin Plate Parking Garage
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54. A complete Solution package in Un-Bonded PT
Thin Plate Parking Garage
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55. A complete Solution package in Un-Bonded PT
36 ft Garage Span on each way
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56. 36 ft Garage Span on each way
A complete Solution package in Un-Bonded PT
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57. A complete Solution package in Un-Bonded PT
36 ft Garage Span on each way
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58. A complete Solution package in Un-Bonded PT
Parking Garage Slab with a Ramp
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59. A complete Solution package in Un-Bonded PT
Openings/Cutouts for other trades
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60. A complete Solution package in Un-Bonded PT
Block Out for other trades
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61. A complete Solution package in Un-Bonded PT
STRESSING OF TENDONS
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62. Stressing Jack
A complete Solution package in Un-Bonded PT
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63. A complete Solution package in Un-Bonded PT
Pump Set
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64. A complete Solution package in Un-Bonded PT
Stressing of Tendons
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65. A complete Solution package in Un-Bonded PT
Stressing of Tendons
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66. A complete Solution package in Un-Bonded PT
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67. A complete Solution package in Un-Bonded PT
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68. A complete Solution package in Un-Bonded PT
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69. A complete Solution package in Un-Bonded PT
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70. A complete Solution package in Un-Bonded PT
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71. A complete Solution package in Un-Bonded PT
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72. A complete Solution package in Un-Bonded PT
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73. A complete Solution package in Un-Bonded PT
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74. Islamabad Club
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A complete Solution package in Un-Bonded PT

75. Islamabad Club
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A complete Solution package in Un-Bonded PT

76. International Textile
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A complete Solution package in Un-Bonded PT

77. International Textile
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A complete Solution package in Un-Bonded PT

78. Prime Flour Mill
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A complete Solution package in Un-Bonded PT

79. Korangi Factory
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A complete Solution package in Un-Bonded PT

80. Nazeer Dying
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A complete Solution package in Un-Bonded PT

81. Anis Apparel
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A complete Solution package in Un-Bonded PT

82. 70 Riviera
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A complete Solution package in Un-Bonded PT

83. 70 Riviera
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A complete Solution package in Un-Bonded PT

84. A complete Solution package in Un-Bonded PT
Saint Mary, RWP
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85. A complete Solution package in Un-Bonded PT
Saint Mary, RWP
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86. A complete Solution package in Un-Bonded PT
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First Turn Key Project

87. A complete Solution package in Un-Bonded PT
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IFMCH Hospital Mirpur Sakro
FIRST TURN KEY PROJECT:
Name of Project: IFMCH Hospital Complex
Client Name: IFMCH
Estimated time of Completion: 36months
Total Covered area: 100,000 sq.ft.
Basement: 4900 sq.ft
Ground Floor: 26242.25 sq.ft
First Floor: 16915 sq.ft
Second Floor: 8364.45 sq.ft
Third Floor: 8364.45 sq.ft
Fourth Floor: 8364.45 sq.ft
Fifth Floor: 8364.45 sq.ft

88. Thank you..