E-SPLICETM

Reinforcing Bar Couplers through Friction-Weld Technology

ABOUTNATSTEELNatSteel Holdings – a leading Pan-Asian company that delivers premium steel products and solutions for theconstruction industry

NatSteel traces its lineage to 1961, when it was incorporated as National Iron and Steel Mills. A pioneer and key partner in Singapore’s nation building efforts, our products are used in most construction projects island-wide, from the iconic Changi International Airport to the public housing that is the trademark of Singapore’s landscape.

Singapore is home to NatSteel’s headquarters, as well as its flagship plant, which boasts one of the largest single downstream rebar fabrication operations in the world. The Singapore plant is the only local steel mill with an integrated upstream and downstream operation, where steel is manufactured through recycling scrap, and fabricated according to customers’ needs. With operations spanning across the region, the group has an annual steel production capacity of over 2 million tonnes.

NatSteel today continues to build on its success as a leading steel producer in Asia Pacific, with over 3,000 employees across the region. Tata Steel is among the top global steel companies with an annual crude steel capacity of over 28 million tonnes with major foot prints in India, the UK, Netherlands, Thailand, China and Australia. As part of the Tata Steel group, NatSteel is poised for further growth, with its sights set on becoming the global steel industry benchmark for value creation and corporate citizenship.

Contents

About NatSteel About E-SPLICE™Product features of E-SPLICE™ and Friction-Weld Technology Specifications of E-SPLICE™Method statement for installing E-SPLICE™ (Standard & Position)Advantages of using E-SPLICE™ systemAreas of Application

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ABOUTE-SPLICE™The E-SPLICE™ mechanical splicing system is a proprietary “Bar Break” mechanical splicing system designed to be used in the construction industry for splicing high tensile deformed (HTD) bars.

Friction-Weld Technology

Product Features

Basic Steps inFriction-Welding

Friction-weld (FRW) is a welding process that produces a weld under the compressive force contact of workpieces rotating relative to one another. It is a solid-state welding process in which joining occurs at a temperature below the melting points of the workpieces.

It can be used to join two pieces of similar or dissimilar metals of the same or different diameters, producing a joint that is much stronger than the strength of the weaker metal.

• Parallel-threaded mechanical splicing designed for the connection of concrete reinforcement bars of 16 to 40 mm

• Designed and manufactured in compliance with BS 8110• Full tension splice: Bar-break guaranteed under tensile load • No reduction of the bar cross section area• Easy installation, no torque wrench required • Couplers and threaded bars are protected by plastic caps• Full traceability of material origin

Through the use of friction-weld technology for joining mechanical couplers and threaded studs to HTD bars, the E-SPLICETM mechanical splicing system is a high-performance mechanical splicing system with superior fatigue behaviour and higher ultimate strength than HTD bars.

E-SPLICETM is designed in compliance with BS8110. Through the use of fully automated computer numerical control (CNC) machines, NatSteel supplies E-SPLICE™ couplers, threaded studs and welded joints of consistently high quality. This ensures that we produce consistently well-matched threads.

Step 1

Step 2

Step 3

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Method statement for installing E-SPLICE™

Specifications of E-SPLICE™

Friction-welded

Friction-welded

Friction-welded

Friction-welded

Standard coupler

Extended coupler

Standard stud

Standard stud Extended stud

Rebar Rebar

4 5

Standard Coupler

Bar Diameter (mm) 16 20 25 28 32 40

Outer Diameter (mm) 25 30 36 40 46 55

Length (mm) 40 42 54 56 60 72

Threaded Length (mm) 20 22 27 28 30 36

Pitch 2.5 2.5 3 3 3 3.5

Standard Stud

Bar Diameter (mm) 16 20 25 28 32 40

Outer Diameter (mm) 19 22 28 30 34 42

Length (mm) 56 58 65 66 68 80

Threaded Length (mm) 20 22 27 28 30 36

Pitch 2.5 2.5 3 3 3 3.5

Extended Coupler

Bar Diameter (mm) 16 20 25 28 32 40

Outer Diameter (mm) 25 30 36 40 46 55

Length (mm) 42 46 56 58 62 74

Threaded Length (mm) 42 46 56 58 62 74

Pitch 2.5 2.5 3 3 3 3.5

Extended Stud

Bar Diameter (mm) 16 20 25 28 32 40

Outer Diameter (mm) 19 22 28 30 34 42

Length (mm) 76 80 92 94 98 116

Threaded Length (mm) 40 44 54 56 60 72

Pitch 2.5 2.5 3 3 3 3.5

E-SPLICE™ (Position Coupler) - Type B

E-SPLICE™ (Standard Coupler) - Type A

The E-SPLICETM Position System consists of the first bar which is friction-welded with a standard stud, the continuation bar that is friction-welded with an extended stud, as well as an extended coupler. The extended coupler is fully engaged onto the extended stud of the continuation bar at the production line.

1. Position and align both bars end-to-end.

2. The extended coupler is then rotated from the continuation bar to the first bar until full engagement.

3. A pipe wrench is used on the extended coupler to tighten and complete the assembly

The E-SPLICETM Standard system consists of the first bar which is friction-welded with a standard coupler and a continuation bar with a standard stud.

1. Position and align both bars end-to-end.

2. The continuation bar with a standard stud is rotated into the standard coupler until full engagement.

3. A pipe wrench is used on the continuation bar to tighten and complete the assembly.

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Increasingly, the use of mechanical couplers has been recognised by engineers and contractors to bring about benefits that can accelerate construction speed, increase productivity and simplify design details.

• E-SPLICETM couplers save on lap lengths and could result in lower construction cost

• Enhances construction speed by replacing the slow and tedious traditional methods of planting starter bars (e.g. boxing-out or drilling through formwork in wall construction, planting of starter bars into the soil in top-down construction)

• Reduces congestion in lap zones, thus enhancing concrete flow

Advantages of using E-SPLICE™ system

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Future extension

Top-down construction

Column lap-replacement

Corewall / beam connection

Areas of application Schematic diagram Major bene�ts

Wall

4F

3F

GFSo�tof beam

So�tof beam

BI

Roof

Beam starters

Saves cost and time on boxing-out and rougheningSaves on cost of formwork and time as no drillings neededEnable obstruction-free slipping of system formworkReduces cycle time

Reduces congestionEnables speedier constructionDoes not require cranking of barsReduces rebar usage

The fastest possible methodEnables obstruction-free excavationLeast in�uenced by wet weatherReduces congestionDoes not require cranking of barsReduces rebar usage

Eliminates unsightly stumps or starter barsAllow screeding and waterproo�ng work to be done easilyAllows easy extension

Access-way closing

Column continuation

Dividing wall joint

Beam-to-columnconnection

Wall-to-slabconnection

Future extension

NatSteel Holdings Pte Ltd makes no representation or warranty regarding the accuracy, quality, suitability or reliability of the information contained herein. NatSteel Holdings Pte Ltd is not responsible for any errors, omissions, or inaccuracies contained in any information provided by such third parties. While efforts have been made to ensure the accuracy of the information set out herein, there may be inadvertent technical or factual inaccuracies and typographcal errors. NatSteel Holdings Pte Ltd reserves the right to make changes and corrections at any time, without notice. NatSteel Holdings Pte Ltd does not accept any liability or responsibility for the accuracy, completeness or timeliness of the information contained herein. Neither NatSteel Holdings Pte Ltd nor any of it’s employees, agents or officers shall be held liable for any improperor incorrect use of the informationdescribed and/or contained herein and assumes no resposibilty for anyone’s use of the information. In no event shall NatSteel Holdings Pte Ltd or it’s employees, agents or officers be liable for any loss or damage of whatever nature (direct, indirect, special, exemplary or consequential damages) howsoever caused whether arising in contract, tort or otherwise, which may arise as a result of your use of or reliance on any contect or information contained herein.

Areas of ApplicationIncreasingly, the use of mechanical couplers has been recognised by engineers and contractors to bring about benefits that can accelerate construction speed, increase productivity and simplify design details.

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