post tension services india pvt. ltd

MAKING STRUCTURE MORE SUSTAINABLE

Unbonded P-T I-sects (Voided Slab) Maturity Sensing

C O N T E N T

Page No.

Maturity Sensing System28

Company Profile

C O M P A N Y P R O F I L E

Why PTSI

PTSI is based at Vadodara, Gujarat and is lead by a team of dedicated professionals catering to customer needs with a full range of

With experience of providing Mono-strand Unbonded P-T System in more than 800 diverse buildings across various industries,

provider for any sort of concrete structure.

and monitoring in-place concrete strength.

engineers can widen their horizon to create visionary structures.

Professional Unbonded P-T Design

Supply of Unbonded P-T Design

On-site Services

1

234

TOTAL SOLUTION – Value Driven

QUALITY

TRANSPERANCY

We provide end-to-end

Unbonded P-T System

ISO 9001 QMS compliant company

Dedicated Quality Assurance team for

In-house tools and specialized equipment

Well maintained and calibrated equipment

material and services

In-house proficient P-T design

Services orientedapproach

Openly shared our design criteria and

More than 80%

CUSTOMER FOCUS

Company Profile

05

5

Components 12

Key features18

Mono-Strand Unbonded P-T System10

I-Sects (Voided Slab) System22

MATURITY SENSINGSYSTEM

Save TIMESave MONEY

Ensure QUALITY

Key feature : Flat Plate

Mono-strand Unbonded P-T System

18

On-site Photographs

14'-2" 18'-9" 16'-9" 18'-9" 13'-6" 18'-9" 16'-9" 18'-9" 14'-2"

150'-3"

4'-6

"19

'-2"

7 '- 3

"7'

- 3"

38' -1

"

PTS16.5" THK.

PTS16.5" THK.

Components of P-T System

Encapsulated P-T System

Standard P-T System

Anchor PlateP-T Cable

Pocket Former

End Cap

Pocket Former

Encapsulated Anchor PlatePolyethylene Sheathing

P-T Cable


12

I-SECTS (VOIDED SLAB)SYSTEM

COMPANY PROFILE

Introduction

Why PTSI

PTSI is based at Vadodara, Gujarat and is lead by a team of dedicated professionals catering to customer needs with a full range of engineering solutions for concrete construction.

With experience of providing Mono-strand Unbonded P-T System in more than 1000 diverse buildings across various industries, PTSI’s post-tensioning technology and expertise make it India’s most advanced end-to-end Mono-strand Unbonded P-T System provider for any sort of concrete structure.

In addition to Mono-strand Unbonded P-T System we provide I-sects System for Voided Slabs and Maturity Sensing System for measuring and monitoring in-place concrete strength.

We help you to enhance your perception towards building with optimum space utilisation. That means the architects and structural engineers can widen their horizon to create visionary structures.

Professional Unbonded P-T Design

Supply of Unbonded P-T System

On-site Services

1

234

TOTAL SOLUTION – Value Driven

QUALITY

TRANSPERANCY

We provide end-to-end solution for Monostrand Unbonded P-T System

Updated design software

Dedicated Quality Assurance team for material as well as on site operations

Committed maintenance team for calibration of equipment

In-house tools and specialized equipment for calibration

Well maintained and calibrated equipment

Value-added logistics of material and services

In-house proficient P-T design

Services orientedapproach

Openly shared our design criteria and material specifications

More than 80% customer retention

CUSTOMER FOCUS

Company Profile

05

PTSI Team

Technical Forte

40%

60%

DESIGNING

1 Production Head

2 Maintenance Engineer

3 Assembling in-charge

1 Operation Head

6 Team Leader

40 Site Executives

1 Sales Head

5 Managers

36 in Other SupportFunctions

1 Design Head

3 Team Leaders

10 Design Engineers15 Draughtsman

EXECUTION

SALES & MARKETING SUPPORT

PRODUCTION

TECHNICAL TEAM

BUSINESS SUPPORT TEAM

Workshop posses an inventory capacity of

400MT P-T Cable

17,000 Sq. Ft. workshopfor assembling activity

Developed in-house troubleshooting &

retrofitting tools and tackles

28 set of HydraulicStressing Assembly

Dedicated Technical Team

Mechanical EngineersMetallurgical Engineer

Advanced calibrationequipment for hydraulic

assembly

Company Profile

06

Company Profile

07

PTSI Growth

Top 15 Cities (by No. of Project)

More than 1000 projects completed

Under-construction projects130+

Working in major cities15

(City, No. of Projects)

Categories(Sub Categories)(Categories, No. of Projects)

Commercial (446)

Institutional (134)

Residential (212)

Corporate (45)General (10)Industrial (114)

Hospitality (96)

Mall (26)Showroom (23)IT Parks (11)

Schools (39)Colleges (21)

Factory Building (66)Diamond Factory (12)Textile Market (14)Hotel (48)Hospital (10)

02007 2008 2009 2010 2011 2012 2013 2014 2015 2016

Years

Met

ric

Ton

OR

Sq.

Ft.

Are

a (X

1000

)

Data as on 31st March 2016

Data as on 30th September 2016

Area (in Sq. Ft.) P-T Cable (in MT)

Installed more than

of P-T Cable in approx.

of area till date.

11300 MT28 million Sq. Ft.

6000

5000

4000

3000

2000

1000

Vadodara (218)Surat (363)

Ahmedabad (72)Vapi (53)

Jaipur (40)Mumbai (42)

Pune (35)Nashik (33)Bhavnagar (20)Indore (18)Rajkot (14)Bharuch (11)Jamnagar (10)Valsad (10)Aurangabad (8)

PROJECT : Urmi Estate (Tej Tower)Developer : Keshav & Co. (TG Group)Structural Consultant : Mr. U. N. KamathArchitect : Mr. Raja AederiLocation : MumbaiTotal Area : 3,50,000 (Sq. Ft.)

PROJECT : Tata Consultancy ServicesDeveloper : Roma Builders

(Hiranandani Group)Structural Consultant : Mahimtura ConsultantsArchitect : Design Center (Hiranadani)Location : MumbaiTotal Area : 10,67,100 (Sq. Ft.)

PROJECT : Sandip Foundation CampusDeveloper : Sandip FoundationStructural Consultant : Mr. Shailesh DhumneArchitect : Mr. Abhoy ShahLocation : NashikTotal Area : 5,00,000 (Sq. Ft.)

PROJECT : Millenium Textile HouseDeveloper : Shanti Residence Pvt. Ltd.Structural Consultant : Mr. Jalil SheikhArchitect : Mr. Sanjay JosshiLocation : SuratTotal Area : 5,07,150 (Sq. Ft.)

PROJECT : NMIMS CampusDeveloper : Shri Vile Parle Kelavani Mandal

Structural Consultant : PT Gala Consultants Architect : Talati & Panthaky AssociatesLocation : IndoreTotal Area : 3,17,100 (Sq. Ft.)

PROJECT : SRK Diamond FactoryDeveloper : Shri Ramkrishna ExportsStructural Consultant : Mr. Hiren DesaiArchitect : Mr. Snehal Shah (Essteam)Location : SuratTotal Area : 53,230 (Sq. Ft.)

PROJECT : Shivalik ShilpDeveloper : GSS Organisers LLP

Structural Consultant : Ducon Consultants Pvt. Ltd.Architect : Sanjay Puri ArchitectsLocation : AhmedabadTotal Area : 6,84,900 (Sq. Ft.)

PROJECT : Ratnaakar Nine SquareDeveloper : NCPL Infracon LLPStructural Consultant : Ducon Consultants Pvt. Ltd.Architect : ADS Architect Pvt. Ltd.

Location : AhmedabadTotal Area : 4,40,600 (Sq. Ft.)

PROJECT : BEL IndoreDeveloper : Brilliant Tenchnologies &

Construction Pvt. Ltd. Structural Consultant : Mr. Jayesh Jain (RKGA)Architect : Space Forum ArchitectsLocation : IndoreTotal Area : 2,97,014 (Sq. Ft.)

PROJECT : Signature Gift City

Structural Consultant : Mahimtutra ConsultantsArchitect : Mr. Hafeez ContractorLocation : GandhinagarTotal Area : 3,15,800 (Sq. Ft.)

PROJECT : Light HallDeveloper : Gamma Construction Pvt. Ltd.

Balaji Tele Developers Ltd.Structural Consultant : Mahimtura ConsultantsArchitect : Pushkar ConsultantsLocation : MumbaiTotal Area : 2,61,000 (Sq. Ft.)

PROJECT : Nilamber TriumphDeveloper : Nilamer Infratech LLPStructural Consultant : Geo Designs & Research (P) LtdArchitect : P. G. Patki ArchitectsLocation : VadodaraTotal Area : 3,82,300 (Sq. Ft.)

PROJECT : Alembic Business ParkDeveloper : Alembic Ltd.Structural Consultant : AADesai Consulting Engineer Architect : Mandviwala & Qutub AssociatesLocation : VadodaraTotal Area : 1,03,700 (Sq. Ft.)

PROJECT : Siyaram Silk MillClient : Siyaram Silk MillStructural Consultant : Mr. Manish Shah (Shilpam) Architect : -Location : DamanTotal Area : 52,025 (Sq. Ft.)

PROJECT : HeadquarterDeveloper : Green Acres Builders & Developers

Structural Consultant : Mr. Arjav UpadhyayArchitect : Mr. Vijay Gupta Location : IndoreTotal Area : 24,810 (Sq. Ft.)

PROJECT : Raheja Sapphire Developer : S. Raheja Sapphire Residency LLP

Structural Consultant : PT Gala Consultants Architect : SNG ConsultantsLocation : MumbaiTotal Area : 53,500 (Sq. Ft.)

PROJECT : Parekh AlluminexClient : Parekh AlluminexStructural Consultant : Mr. Janak BhavsarArchitect : -Location : Vapi Total Area : 42,000 (Sq. Ft.)

PROJECT : Mexus CorporationClient : Meril Life ScienceStructural Consultant : Mr. Yogesh KerawalaArchitect : -Location : VapiTotal Area : 2,15,000 (Sq. Ft.)

PROJECT : Vidhya AtelierDeveloper : Mr. Gopal DokaniaStructural Consultant : Mr. Jalil SheikhArchitect : Mr. Ajit JariwalaLocation : SuratTotal Area : 73,500 (Sq. Ft.)

PROJECT : Yantric BuildingClient : FEM Construction (I) Pvt. Ltd.Structural Consultant : Dr. H. M. RajeArchitect : Design MatrixLocation : Mumbai Total Area : 42,300 (Sq. Ft.)

PROJECT : AAA Corporate HouseClient : Apurva Amin ArchitectsStructural Consultant : Ducon Consultants Pvt. Ltd.Architect : Mr. Apurva AminLocation : AhmedabadTotal Area : 6,748 (Sq. Ft.)

Projects Highlights

Company Profile

08

Developer : Volupia Developers Pvt. Ltd.(Hiranandani Group)

Members of

Awards and Accreditation

Societal Activities

Indian Construction Industry Awards 2015Awarded as “Sarvottam Construction Technology Service Provider in Unbonded Post Tensioning System” by Builders’ Association on India (BAI) in 2015.

Appreciation for Guinness Book of World RecordsAccredited for the services rendered for the Post-Tensioning by N. M. Roof Designers Ltd., Jaipur for being awarded by the GUINNESS BOOK OF WORLD RECORDS as the WORLDS LARGEST REINFORCED CEMENT CONCRETE FLAT ROOF WITH A SINGLE SPAN OF 119ft in 2009.

Indian Achievers Award for Industrial Development 2008Honored with “INDIAN ACHIEVERS AWARD FOR INDUSTRIALDEVELOPMENT” by All India Young Achievers Foundation in 2008.

PTSI has entered into an Memorandum of Understanding (MOU) with Parul Institute of Engineering & Technology (Parul University) for supplementing awareness of the latest developments in the industry through training and seminars.

Membership Category:Post-Tensioning Company

Supported the wall painting traffic carnival in association with Vadodara city police through which school children and students of The Maharaja Sayajirao University of Baroda painted the entire 1 kilometer compound wall of the union pavilion for the "The Road Safety Carnival 2013"

Company Profile

09

MONO-STRAND UNBONDED P-T SYSTEM

MONO-STRAND UNBONDED POST-TENSIONING SYSTEM

Pre-stressed Concrete

PTSI provides Unbonded Post-Tensioning System which is a means of complementing the strength of the concrete in compression and overcoming its weakness in resisting tension. Post-Tensioning Systems apply compressive force to the structure through the stressing of high strength steel strand with specialized anchorage assemblies. The flexibility of the strand is a major advantage, allowing it to be profiled through the concrete element, counteracting a portion of the applied loads to provide an exceptionally efficient structure.

Simple Bending Action in RCC Beams

Effects of Post-Tensioning during Bending Action

Weight (Load)

T

C

Compression (C)

Diagram ofDesign Stress

Tension (T)

Combined Effects Of Stresses

C

T

C

Weight (Load)

P.eZ

PA

+

DESIGN STRESSES

MZ

PRE-COMPRESSION LOAD-BALANCING FINAL STRESSES

+ =C

T

T

C

C

T

C

PA

P.eZ


11

Components of P-T System

Encapsulated P-T System

Standard P-T System

Anchor PlateP-T Cable

Pocket Former

End Cap

Pocket Former

Encapsulated Anchor PlatePolyethylene Sheathing

P-T Cable


12

Technical Specifications7 Wire Unbonded Mono-strand

Anchor Plates

Wedges

Material Specifications

Pre-stressing Steel:(1) Low-Relaxation 7 wire Strand of Class II (Grade

1860) with 12.7mm nominal diameter used in monostrand unbonded post tensioning tendons shall conform to the requirements of IS-14268:1995

(2) Sectional steel area of Strand: 98.7mm (3) Yield Load: Not less than 180kN(4) Ultimate Strength: Not less than 1860N/mm

2

2

2

(5) Minimum Breaking Strength: Not less than 183.7kN

(6) Modulus of Elasticity: At least 196,500N/mm (7) Minimum elongation: 3.5% for gage length

of 600mm(8) Relaxation at 1000 hours: Less than 2.5% at

70% Minimum Ultimate Tensile Strength

(9) Weight of Bare Strand: More than 0.775kg/m

Grease Coating Specifications:(1) Grease coating shall provide protection

against corrosion to the Prestressing steel(6) It shall be a compound with appropriate

moisture-displacing and corrosion-inhibiting properties.

(7) Minimum weight of the grease coating on the Prestressing strand shall not be less than 37.4grams/m for 12.7mm diameter strand.

(8) The coating material shall fill the annular space between the strand and sheathing and shall extend over the entire tendon length.

Sheathing Specifications:

(1) Sheathing material: polyethylene orpolypropylene

(2) Minimum Density: 0.94gram/cm

(3) Thickness: more than 1 mm

3

(4) Appearance: Sheathing shall provide a smooth circular outside surface

(5) Coverage: Sheathing shall be continuous over the entire length to be un-bonded, and shall prevent intrusion of cement paste or loss of P-T coating.

SpecificationsHardness:

(A) At Surface: 56 – 65HRC

(B) At Core: 40 – 46 HRC

Material Grade:

IS:9175 (Part 20)-1986 Grade 20MnCr5

SpecificationsMicrostructure:

(A)

Hardness Number: 170 – 230BHN

Graphite Type (As per ASTM A247 Plate I & III)- Form I & II (Spheroid or Nodular type)- Distribution A (Uniform Distribution)- Size: 6 – 8

(B) Nodularity: 90 – 95%(C)(D)

Carbide: Less than 3%Pearlite: 35 – 40%

Mechanical Properties:ASTM A 536 Grade 80-55-06 ORIS 1865 Grade SG 500/7

Material Grade:

(2) It shall provide proper lubrication betweenthe strand and sheathing

(3) It should resist flow within anticipated temperature range of exposure

(4) It should provide continuous non-brittle coating at lowest anticipated temperatureof exposure

(5) It should be chemically stable and non-reac-tive with Prestressing steel, reinforcing steel, sheathing material and concrete.


13

Working Sequence

Material Procurement

Material Fabrication &Dispatch

Shuttering and Bar Binding

P-T Cable Laying

Extra Top Steel Placement

Concrete Pouring

Stressing

Cutting of Excess Cable& Pocket Filling


14

Visuals


15

General Criteria for the Design of P-T Elements

(Ref.: ACI 318M-11, IS 1343 : 2012 and IS 456 : 2000)

Live Load (LL): in kN/m² (As per recommendation received from the Structural Consultant)(1)

Floor Finish (FF): in kN/m² (As per recommendation received from the Structural Consultant)(2)

Wall Load: in kN/m² (either as per recommendation of the Structural consultant or as per the information available about the wall layout, thickness and unit weight of the material to be used)

(3)

Service Duct & False Ceiling Load: in kN/m² (As per recommendation received from the Structural Consultant)(4)

Self-weight of the members: as per the section size (considering pre-stressed concrete weight 23.5 kN/m³ as per IS 875 part 1 : 1987)

(5)

Minimum Grade of Concrete (fck): M35 (cube strength) (6)

Grade of Steel: fe415 or fe500 (as per the recommendation from the consultant/client in advance for the prelim design)(7)

Level of Pre-stressing as per ACI 318M-11 (clause 18.3.3): (8)

Level of Pre-stressing as per IS 1343-2012 (clause 24.2.1): (9)

Criteria for maximum spacing of tendon placement shall be followed as per ACI 318M-11 clause 18.12.4: 8*slab thickness and 5ft whichever is smaller for the uniformly distributed tendons in slab.

(10)

Additional non-prestressed reinforcement provided as per the criteria of ACI 318M-11 clause 18.9 for minimum non-pre-stressed reinforcement and clause 18.7 for the required non-prestressed reinforcement to achieve required flexural strength at ultimate load combination case. Reinforcement requirement for temperature and shrinkage effects shall be as per Clause 19.6.3.3 of IS 1343 : 2012 i.e. 0.15% of total cross section area of the concrete section.

(11)

Permissible Deflection values (Long Term with shrinkage and creep effect considering creep coefficient as 2) as per IS 1343 : 2012 clause: 20.3.1 a, b, c

(12)

Anchorage of P-T Cable shall be placed such that the centroid of all the anchorage should fall under middle-third of the depth

(kern) of member. Preferably, it shall not be more than ⅔ depth of the member when measured from the bottom.

(13)

The minimum CGS height of tendon at the mid-span shall not be less than 38 mm in case of slab and 55mm in case of beam when measured from the bottom.

(14)

Minimum clear cover to the reinforcement shall be 20 mm for the slab and 40 mm clear from the longitudinal reinforcement for the beams.

(15)

PTSI submits moment of resistance (moment capacity) at respective sections for P-T beams when the Structural Consultant likes to consider them for the lateral force resisting system. The Consultant can provide necessary passive reinforcement based on the moment of resistance in addition to the requirements of gravity force design performed at PTSI.

(16)

For Two-Way Flat Slabs: Class U; Tensile Stress Limit of concrete slab section for “Serviceability Design Requirements as per ACI 318”: less than or equal to 0.5*square root of equivalent cylindrical strength value of concrete grade at the mid-span bottom fiber zone.

(8.1)

For One-Way Slabs and Beams: Class T for the Normal Loading Criteria and Class C for heavy loads from floating (stub) column to the Girders as well as for member design for Fire Tender Loading.

(8.2)

For Two-Way Flat Slabs: Type-2 with tensile stresses below 3N/mm² at the mid-span bottom fiber zone.(9.1)

Final Downward Deflection due to SW + LL + FF + SDL + PT + Effects of Shrinkage and Creep (corresponding to SW + FF + SDL + PT) should not be more than span/250

(12.1)

Downward Deflection (occurring after erection of partitions and the application of finishes) due to Shrinkage and Creep (corresponding to SW + FF + SDL + PT) and LL should not be more than span/350 or 20mm whichever is lesser shall be considered.

(12.2)

Total upward deflection should not exceed span/300 unless uniformity of camber between adjacent units can be ensured. Note: The criteria 12.1 and 12.2 same as prescribed in IS 456 : 2000 clause 23.2.a and 23.2.b respectively.

(12.3)

For One-Way Slabs and Beams: Type-2 for the Normal Loading Criteria, and Type-3 for heavy loads from floating (stub) column to the Girders as well as for member design for Fire Tender Loading.

(9.2)


16

Featured ProjectSatsang Hall for Govind Devji Temple, Jaipur

(Structure of Satsang Hall for Govind Devji Temple)

Forming Plan of Satsang Hall, Jaipur

A remarkable project completed in 2009 and serving nicely for the intended purpose. There are total eight columns, all are at the perimeter of the 119 feet x 124 feet area. Four at the corners and four at the side edges. There is no inter-nal support. It is a waffle floor configura-tion with 57 inches deep P-T beams both ways and 8 inches thick P-T slab panels. There was constrain about total height of the hall. The height is not more than parent temple of Lord Krishna, adjacent to the hall, which is of great religious importance. This made it worth applying post-tensioning in the beams and hence the beam depth is reduced to consider-able extent such that it satisfied the prime requirement. Deflection control was one of the major aspects as far as its design was concerned. The structure is awarded by Guinness World Record after its construction.

Recognized by GuinnessWorld Records in 2009

Appreciation Letter forproviding P-T sevices


17

123'

-4"

128'-4"

PTS18" THK.

Key feature : Flat Plate


18

On-site Photographs

14'-2" 18'-9" 16'-9" 18'-9" 13'-6" 18'-9" 16'-9" 18'-9" 14'-2"

150'-3"

4'-6

"19

'-2"

7'-3

"7'

-3"

38'-1

"

PTS16.5" THK.

PTS16.5" THK.

Key feature : Cantilever


1940[6'-4"]

6705[22']

6875[22'-7"]

765 [2'-6"]

6647 [21'-10"]

5147 [16'-11"]

1360[4'-6"]

3760[12'-4"]

2295[7'-6"]

1800[5'-11"]

2140[7']

4700[15'-5"]

1290[4'-3"]

7200[23'-7"]

4990[16'-4"]

570 [1'-10"]

2314[7'-7"]

32419 [106'-4"]

765 [2'-6"]

6875[22'-7"]

6705[22']

1940[6'-4"]

2855\[9'-4"]

1430[4'-8"]

1965[6'-5"]

6020[19'-9"]

1965[6'-5"]

1430[4'-8"]

2855[9'-4"]

1940[6'-4"]

6705[22']

6875[22'-7"]

765 [2'-6"]

51090[167'-7"]

1601[5'-3"]

5840[19'-2"]

3547 [11'-8"]

10" th.PTS1

10" th.PTS1

10" th.PTS1

7097[23'-3"]

10930 [35'-10"]

7612[25']

4000 [13'-1"]

6930 [22'-9"]

6647 [21'-10"]

8957[29'-5"]

3117[10'-3"]

5840[19'-2"]

1643[5'-5"]

3856 [12'-8"]

8890[29'-2"]

3000[9'-10"]

19

On-site Photographs

Key feature : IT Park (Drop Panel)


20

41150 [135']

11250[36'-11"]

8650[28'-5"]

11650[38'-3"]

6900[22'-8"]

1500 [4'-11"]

1200 [3'-11"]

131490[431'-5"]

7295[23'-11"]

11300[37'-1"]

11300[37'-1"]

11300[37'-1"]

11300[37'-1"]

7600[24'-11"]

11300[37'-1"]

7600[24'-11"]

11300[37'-1"]

11300[37'-1"]

11300[37'-1"]

11300[37'-1"]

7295[23'-11"]

POUR-132045

[105'-2"]

POUR-221100 [69'-3"]

POUR-319200 [63']

POUR-221100 [69'-3"]

POUR-132045

[105'-2"]

11" th PTS1

11" th PTS1

11" th PTS1

11" th PTS1

11" th PTS1

41150 [135']

On-site Photographs


21

Key feature : Industrial (P-T Beam)

4235[13'-11"]

3791[12'-5"]

9554[31'-4"]

7876[25'-10"]

7910[25'-11"]

2989[9'-10"]

2989[9'-10"]

3539[11'-7"]

325 [1'-1"]

1305 [4'-3"]

44512[146']

200

[8"]

3500

[11'

-6"]

3300

[10'

-10"

]63

50[2

0'-1

0"]

6350

[20'

-10"

]63

50[2

0'-1

0"]

6350

[20'

-10"

]63

50[2

0'-1

0"]

3175

[10'

-5"]

6350

[20'

-10"

]63

50[2

0'-1

0"]

6350

[20'

-10"

]57

00[1

8'-8

"]57

00[1

8'-8

"]57

00[1

8'-8

"]57

00[1

8'-8

"]57

00[1

8'-8

"]57

00[1

8'-8

"]60

70[1

9'-1

1"]

6910

[22'

-8"]

200

[8"]

1115

30[3

65'-1

1"]

3175

[10'

-5"]

I-SECTS (VOIDED SLAB)SYSTEM

I-SECTS (VOIDED SLAB) SYSTEMIn association with Daliform Group SRL, Italy, we present I-sects Forming System / U-Boot Beton® (a voided slab technology) that allows large spans, efficiently formed as flat plates without beams, for many types of buildings and other structures while using significantly less concrete than if solid. This is the most versatile voided slab system that allows builders to use less material and still maintain structural integrity.

The Concept

Basic idea of the Voided Slab Technology

The concept is actually quite old. By using forming systems engineers have decreased the weight of floor slabs by creat-ing voids through a variety of techniques for a very long time. But newer systems now make it possible to increase the efficiency of cast-in-place (CIP) concrete construction and reduce overall cost.

Traditional voided-slab forming systems that have been used include waffle slabs, single-and double-direction span forming systems, and hollow-core precast slabs. The guiding principle, is that building owners and designers can get the advantages of a thin two-way-spanning flat-plate structure while the structural engineer can lighten the floor by more efficiently using the concrete.

Compact Bone

Cancellous Bone

Space Containing Bone Marrow and Blood Vessels Traveculae

INSPIRED BY

NATURE

Eliminate concrete in the zones of a slabwhere from a static perspective there isno necessity for it.

At the same time, OPTIMIZE the SLAB’S THICKNESS and

BUILDING MATERIAL VOLUME.

Structural Properties of a Bone

I-sects (Voided Slab) System

23

Practical Conceptualisation

Slab With Hidden Dropcap Making Flat Ceiling

Application Of I-sects (Voided Slab) System

Ceiling SlabMassive slab

Even if we can’t see, the BEAMS still EXIST and RUN IN BOTH DIRECTION.

Ceiling Slab with I-sect (Voided Slab) SystemLighten Slab

U-Boot Beton® is used in all applications that require a structural plate together with the need to use less concrete and therefore for a lighter structure.

U-Boot Beton® is the ideal solution for creating slabs with a large span and/or great load-bearing capacity: it is particu-larly suited for structures that require considerable open spaces, such as executive, commercial and industrial buildings as well as public, civil and residential structures. It makes it possible to more irregularly distribute the pillars, as beams do not need to be created. In the case of yards that are difficult to access or restructuring work, U-Boot Beton®, due to its stackability, modularity, lightness and maneuverability, can be used to make horizontal structures without the help of handling and hoisting equipment.


24

Advantages

Characteristics Of A U-boot Beton® Slab And Comparison WithA Conventional Solid Slab

We are incorrectly led to estimate the advantage of a slab made lighter with U-Boot Beton® limiting it to a mere com-parison between savings in concrete and the cost of the formwork on the level of the slabs only.

In this way however, as the analysis is immediate and intuitive, it does not account for the various economic, practical and operational advantages provided with U-Boot Beton® for the entire structure:

less use of reinforcement in the slabs, columns and foundation up to a total of 15% (also in the case of variants)less concrete is used not only for the slabs but also for the columns and foundationsthere are seismic advantages related to reduced building weightslimmer columns and foundations, lower costs related to excavation for foundations incorporates irregular arrangement of the columns to reflect the architectural freedom of the structure

Columnspacing

c/c

Thickness of the proposed

slab with imposed

load of 500 kg/m2

H Upper H U-Boot H LowerVoid slab

moment of inertia

Solid Slab moment of

inertia

Equivalent percentage

loss of height

Void slab

volume

Solid slab

volume

Weightsavings

m mm mm mm mmx104

mm4/mx104

mm4/m%

m3/m2 m3/m2 %

7x7 260 50 160 50 122,364 146,467 5.85 0.1930 0.26 26

8x8 300 70 160 70 200,897 225,000 3.73 0.2330 0.30 22

9x9 340 50 240 50 246,063 327,533 9.12 0.2385 0.34 30

10x10 360 100 160 10 364,697 388,800 2.14 0.2930 0.36 19

11x11 380 70 240 70 375,796 457,267 6.36 0.2785 0.38 27

12x12 420 50 320 50 429,513 617,400 11.43 0.2861 0.42 32

13x13 440 100 240 100 628,396 709,867 4.02 0.3385 0.44 23

14x14 460 70 320 70 623,247 811,133 8.44 0.3261 0.46 29

15x15 500 50 400 50 673,542 1,041,667 13.56 0.3315 0.50 34

16x16 520 100 320 100 983,847 1,171,733 5.70 0.3861 0.52 26

17x17 540 70 400 70 944,075 1,312,200 10.43 0.3715 0.54 31

18x18 580 50 480 50 989,345 1,625,933 15.30 0.3770 0.58 35

19x19 600 100 400 100 1,431,875 1,800,000 7.38 0.4315 0.60 28

20x20 620 70 480 70 1,349,478 1,986,067 12.13 0.4170 0.62 33

21x21 680 100 480 100 1,983,678 2,620,267 8.90 0.4770 0.68 30 25



26

Detailing Name : Shaktidham TempleDeveloper : Bharuka Construction

Architect : Nadkarni Mahajan & AssociatesLocation : AurangabadTotal Area : 6,340 Sq. Ft.

Structural Consultant : Mr. Milind Rathi

Flat Plate with Voided Slab (with Unbonded P-T System)

3415 [11'-2"] 5000 [16'-5"] 5000 [16'-5"] 5000 [16'-5"]

18680 [61'-3"]

4700 [15'-5"]5600 [18'-4"]

4665 [15'-4"]1465

[4'-10"]15522 [50'-11"]

PTS1480 MM

PTS1480 MM

Flat Plate with Voided Slab (with Unbonded P-T System)

Site Visuals


27

MATURITY SENSINGSYSTEM

Save TIMESave MONEY

Ensure QUALITY

MATURITY SENSING SYSTEMMaturity Sensing System is a rugged, waterproof, wireless sensor/logger for monitoring the temperature of concrete from fresh stage to hardened stage. It can be placed in the concrete formwork at the time of casting to monitor the temperature of concrete on site. The continuous measurements are recorded and can be downloaded any time during the concrete setting and hardening stages.

The continuous monitoring of concrete temperature can be used as a QC/QA procedure as well as maturity-based strength estimation of concrete. The field monitoring of concrete temperature and strength using maturity meter can also help with optimizing the formwork removal time, application of load on the structure, stressing of post-tensioned cables, as well as opening traffic on concrete pavement.

HOW IT IS USEDBefore construction begins, a set of test specimens are cast, out of them some with the maturity sensors embedded, to plot the relationship between compressive strength and maturity (degrees Celsius – hours) for the specified mix design. At standard intervals – 1, 2, 4, 7, and 14 days – strength and maturity are measured. Results are presented graphically, known as “Calibration Curve”.

HOW IT WORKSMaturity Sensing System is a complete system, designed for convenience and ease of use. And it is engineered to stand up to the rugged conditions of heavy construction sites.

The system includes:

Maturity SensorsMaturity Sensors, contain a long-life battery, microprocessor, memory, and thermistor. Placed in concrete while casting, Sensors continuously calculate and store concrete maturity data. A tough casing protects the intelligent electronics inside.

A

Reader / SoftwareThe handheld Reader is used to communicate with embedded Sensors. Workers simply connect Sensors and use the Reader to view and download maturity data.

B

Maturity Sensing System

29

Maturity, (°C-hours)Calibration Curve

FEATURESMaturity Sensing System utilizes – and optimizes – the maturity method, adopted as an industry standard by ASTM, ACI, NIST, and others, offering real advantages over traditional cylinder testing and other maturity products.

More accurate than lab- or field-cured PCC test specimensReal-time data display for faster decisions. No waiting for 2, 3, or 7-day breaksContinuous measurement and recording of temperatureA complete system for worksite and office convenienceRugged Sensors protected by casing and surrounding concreteEasy data sharing to other devices like computerPortable handheld for easy on-site data download anywhere, at any time. No need to carry computers around the job site

4 easy steps to measure temperature or strength:

Application

Roadway Paving/Patching - Know exactly when to allow for trafficBridges - Know when to strip formwork, remove shoring, and load structures, incrementally allow classes of traffic based on actual in-place strength Midrise and high-rise buildings - Know when to remove formwork (shuttering), remove shoring/reshoring, and load structuresMass Pours - Use real time strength information to determine safe temperature gradientsPrecast Operations- Monitor element strengths to optimize processes and timing of shipmentsCold Weather - Cold weather can slow concrete strength gain tremendously. Maturity techniques determine actual in-place and accounts for environmental influences on strength gainPost Tensioning - Optimize post tension timing like stressing, shuttering removal and reshoring schedulingForm Stripping - Optimize the timing of form stripping operations in conventional construction

Maturity Sensing System can be used to monitor the temperature profile of fresh and hardened concrete.

This can provide information on:

Hardening of concreteOptimization of curing conditionsMonitoring on heating and cooling processesQuality control in the fieldConcrete maturityEstimation of strength (ASTM C1074)Concrete mix design optimization

SpecificationASTM (American Society for Testing and Materials)

ACI 228.1R (Section 2.7) - "In-Place Methods to Estimate Concrete Strength"ACI 306R - "Cold Weather Concreting"ACI 318 - "Building Code Requirements for Structural Concrete"R6.2 "Evaluation of concrete strength during construction may be demonstrated by field-cured test cylinders or other procedures approved by the building official such as: Maturity factor measurements and correlation in accordance with ASTM C 1074

ASTM C 1074 - "Standard Practice for Estimating Concrete Strength by the Maturity Method"ASTM C 918 - "Standard Test Method for Measuring Early-Age Compressive Strength and Projecting Later-Age Strength“ASTM C1064 - “Standard Test Method for Temperature of Freshly Mixed Hydraulic-Cement Concrete"

ACI (American Concrete Institute)

Maturity Sensing System

30

1. Embed and Pour 2. Activate 3. Log 4. Read

For solutions contact:

Presence in other cities – Pune, Jaipur, Bengaluru, Indore

SuratD-517, International Trade Center (ITC), Majura Gate,Surat – 395 002, Gujarat, IndiaPhone: +91 75678 78798 | +91 265 2491298E: [email protected]

Contact Person: Mr. Vipul MistryM: +91 9377174743E: [email protected]

Vadodara (Head Office)

Phone: +91 75678 78798 | +91 265 2491298E: [email protected]

PTSI, Off Genda Circle, Opp. Baroda People’s Co. Society,Alkapuri, Vadodara - 390 007, Gujarat, India

Contact Person: Mr. Urav Patel M: +91 9377173493E: [email protected]

E 307, Titanium City Center, Anand Nagar Road, Next to Sachin Towers, Ahmedabad – 380015, Gujarat, India

AhmedabadContact Person: Mr. Pratik MahajanM: +91 9328868726E: [email protected]: [email protected]

Mumbai401, Fiji Building, G L CompoundPowai, Mumbai-400076

E: [email protected]

Contact Person: Mr. Sachin PatilM: +91 9325023867E: [email protected]

Contact Person: Mr. Vaibhav MalpaniM: +91 9422777356E: [email protected]

NashikT-11, Third floor, NSB Center, Canada Corner, Nashik – 422 002, Maharashtra, IndiaE: [email protected]

Contact Person: Mr. Jasdeep GandhiM: +91 9926200992E: [email protected]

RaipurB-2, Ground Floor, Crystal Tower, Telibandha, Raipur – 492 001, Chhattisgarh, IndiaE: [email protected]

Maharashtra, India

www.ptsindia.net

Disclaimer

Associate Company:

This document has been published for the purpose of providing information of a general nature only. Any reliance on or use, by you of any information contained within this document for any purpose whatsoever shall be entirely at your own risk, and any liability to you is expressly disclaimed to the maximum extent permitted by law.

PTSI, Off Genda Circle, Opp. Baroda People’s Co. Society,Alkapuri, Vadodara - 390 007, Gujarat, IndiaPhone: +91 75678 78798 | +91 265 2491298Email: [email protected]