Basic Consepts of Pre-stressing:

Prestressed concrete is basically concrete in which internal stresses of a suitable magnitude and distribution are introduced so that the stresses resulting from external loads are counteracted to a desired degree. In reinforced concrete members, the pre-stress is commonly introduced by tensioning the steel reinforcement.

How PT Works:

P-T v/s R.C.C.~ A Cost Benefit Ratio:

P-T reduces the concrete volume by 10 to 20%

Cost of reinforcing is typically 20 to 30% less as compared to conventional reinforced structure.

Formwork can be stripped off after 6-7 days (as soon as stressing is completed), thereby saving time & money by achieving project target completion before the due date.

Average bay (Column) spacing is 25 to 30 feet without increase in the slab thickness, thus saving

construction cost.

Concrete Slabs are thinner and consequently lighter and less costly.

More clear Headroom obtained through P-T Assembly Installation. Cost Benefit in Electrical Conduits (per ft.) & relative consumption of accessories, fixtures, thereby enhancing uninterrupted electrical work.

For flat slab in 8m x 8m or 9m x 9m Grid, P-T costs approximately Rs. 40 to 50 per sq. ft. with any kind of desired geometry availed better than R.C.C.

Since the reinforcement is protected, P-T reinforced structures have lower annual maintenance costs over

time (life cycle costs) PRESTRESSED CONCRETE NOT ONLY SAVES MONEY, BUT ALSO RESULTS IN A BETTER OVERALL PERFORMANCE AS P-T REINFORCED STRUCTUTES HAVE HIGHER DURABILITY AND LOWER MAINTENANCE COSTS.

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Advantages of Bonded PT System :

1. Lighter and Slender members are possible. 2. Section remains un-cracked under Service load. 3. Less deformation improves serviceability. 4. Fast construction can achieved because scaffolding can be removed after stressing. 5. More aesthetic appeal due to slender sections. 6. Flat soffit reduces shuttering, plastering and painting cost. 7. Reduces building height.

8. Internal column layout flexibility.

Application :

High-rise buildings Bridges Silos Tanks Ground floor slabs, Raft Slabs Ground Anchors Railway Sleepers, Electric poles, Piles, Pressure vessels, Concrete pavement, Shells, Folded Plates. Concrete chambers in nuclear reactors.

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Components of Bonded PT System :

High Tension Strands Active end Locking Wedges

Dead/Bulb End Duct Anchor Head

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Equipment of PT System :

Pre-stressing Jack Pre-Stressing Pump

Grouting Pump End Block Making M/C PT Slab Standard Construction Sequence :

Shuttering Bottom Reinforcement

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Profiling & Top Reinforcement Bulb/Dead End Active/Live End

Concreting Finished Bottom of Slab after Stressing &Grouting Visuals from Site (Under Construction) : PT in Commercial Shopping Mall:

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PT in Parking Garage Structures

PT in Industrial Structures

PT in Cantilever Canopy Structure with special configuration and geometry

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Sanfield Prestigious reference Project :

Treasure Market City (MR-10), Indore Empire Glass House, Mumbai Biggest Mall In Central India.

Century 21 Mall, Bhopal Surya Treasure Island Mall, Bhilai

Treasure Island, Jabalpur Treasure Island Mall, Ujjain

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LIST OF JOB REFERENCES FOR POST TENSION BUILDINGS Sr. No.

Client Project PT Area(Sqft.)

Status

1 EWDPL, Indore Mall at Jabalpur

325000

In Progress

2 EWDPL, Indore Mall at Ujjain

220000

Completed

3 EWDPL, Indore Mall at Indore

3234000

In Progress

4 Century Infrastructure Ltd. Century Mall at Bhopal

5174400 In Progress

5 Mr. Ramtani Chitrahaar Electronics 7540 In Progress 6 A.B.V.P. ABVP Head Quarters 12936 In Progress 7 Mr. Mitesh Rathi Mitesh Rathi Classes 8085 Completed 8 Jai Bharti Textiles & Real Estate

Ltd. Proposed Shopping Mall at Vapi 539000 Completed

9 Manoharlal Vijian HUF Metro 99 at Nasik 32340 In Progress 10 Knight frank/Babanco Uppal Mall at Lucknow 650000 Completed 11 Empire Industries Ltd., Mumbai Software Centre Vikroli, Mumbai 545000 Completed 12 Simplex Infrastructures Ltd. Velocity Arcade Mall at Raipur 1078000 Completed 13 Ahluwalia Contracts (India) Ltd., Santacruz Site, Mumbai 90000 Completed 14

Jyoti Cinema,

Jyoti Cinema Commercial Complex, Bhopal

50000 Completed

15 Vivekananda Education Society.

Collage Building at Chembur, Mumbai

125000 Completed

16 Agile Solutions, Commercial Complex at Gulmohar, Bhopal

53900 Completed

17 ShreeUvasaggahar Sadhna Trust, Upashray Site Ghatkopar, Mumbai 3000 Completed 18 M/s Parikalpana, Pranav Bunglow at Ahmedpur, Bhopal 2500 Completed 19 Nav Durga Const. Co., Mumbai Safai Heights II, Mumbai 6860 Completed 20

Maruti Showroom, Bhopal

Maruti Service Station Misrod Rd., Bhopal

161700

Completed

21 Home Constructions P. Ltd. Safal Pride, Mumbai 21800 Completed 22 Rajshi Construction P. Ltd., Mahim Off Bhavani Shankar Rd.

Dadar, Mumbai 30000 Completed

23 Shapoorji Pallonji & Co. Ltd., Metropolitan Properties P. Ltd., Walkeshwar, Mumbai

42500 Completed

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Gyan Ganga Inst. Of Tech. & Management.

Collage at Bhopal

12000

Completed

25

Model School.

Auditorium, Bhopal 10000

Completed

26 M/s S.K. Jain. Hotel Building at M.P. Nagar, Bhopal 87318 Completed 27 People`s Group. PGH International P. Ltd., Bhanpur 1323000 Completed 28 Safal Sanjana Builders &

DeveloperP. Ltd. Andheri Site, Mumbai 38000 Completed

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J C Narayan Wagh,

Metro 99, Nasik

18000

In Progress

30 Sri D.K. Associates Laxmichhaya Bldg. Borivali, Mumbai 13565 Completed 31 Chinarr Mall Hoshangabad Road, Bhopal 129120 In Progress 32 RSS Ashram Kichha Road, Rudrapur (UA) 26620 In Progress 33 Commercial Complex Indore 23672 In Progress 34 Ace Build Tech Mathura Road, New Delhi. 5000 In Progress 35 BSBK Surya Mall Bhilai 110000 In Progress 36 School & Hostel Jhajjar, Haryana 48420 In Progress 37 Spring Valley Katara Hills, Bhopal 37660 In Progress 38 Ishaan Builders Comm. Cplx. Halalpur, Bhopal 126107 In Progress 39 Crompton Greaves Mandideep, Bhopal. 32280 In Progress 40 Quantam Classes M.P.Nagar II, Bhopal 25178 In Progress 41 Commercial Complex. Hoshangabad Road, Bhopal 107600 In Progress 42 LG Commercial Complex. M.P. Nagar II, Bhopal 86080 In Progress 43 PWD Hostel Building Nashik 20000 In Progress 44 Ideal Constructions Indore 20000 In Progress 45 Ashi Sr. Gems Pvt. Ltd. Indore 30000 In Progress. 46 Dwarka Temple Proj New Delhi 14000 In Progress 47 Factory Project Noida 10500 In Progress 48 Telecom Unit H.P. 50000 In Progress 49 Commercial Complex Katni 28708 In Progress 50. Commercial & Off. Spaces ISBT Bhopal 29100 In Progress 51 Sachdeva Farms New Delhi 6700 In Progress 52. Khialdas Construction Nr. ISBT, Bhopal 9700 In Progress 53 Aditya Construction Motel Project, Bhopal 50000 In progress 54. Hotel Cum Commercial Cplx Indore 150000 In Progress 55. Omaxe OCP Mall, Gr. Noida 45000 In Progress 56 Hotel Bhilai 60000 In Progress 57. Commercial Complex Rajauri Garden, New Delhi 45000 In Progress 58 Airen Heights Indore 90000 In Progress 59 Lalwani Commercial Complex M.P. Nagar 12000 In Progress 60 Hotel Cum Residence Arera Colony 25000 In Progress 61

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