TERWA REBAR CONNECTION COUPLERS. CARES Technical Approval 5058 TA1B

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1 Reinforcement Couplers New_Layout 1 07/02/ :41 Page 2 EURO ACCESSORIES TERWA REBAR CONNECTION COUPLERS CARES Technical Approval 5058 TA1B

2 Reinforcement Couplers New_Layout 1 07/02/ :41 Page 3 Introduction The Terwa Parallel Threaded Coupler is a full bar strength system (the coupling is stronger than the associated rebar, sometimes referred to as a Bar Break connection) allowing a safe, reliable and efficient method of providing continuity of reinforcement through stop ends and element intersections. The adoption of a metric parallel thread on an enlarged bar diameter provides sufficient cross sectional area of material at the joint to outweigh the tensile capabilities of the equivalent diameter reinforcing bar. This attribute means the performance of the coupling at the joint can be ignored in any structural assessment, in turn this makes the adoption of the Terwa couplers over the standard detailed bars a simple exchange. The Terwa Parallel Threaded Coupler System has a full CARES Technical approval. This not only verifies the performance of the system in accordance with BS8110 and EC2 it also provides assurance that the components are manufactured and assembled in a fully audited ISO9001 facility. The female coupler (PSA) is supplied to the customer ready assembled on the reinforcing bar. The length of the bar is generally supplied as a full tension lap length in accordance with EC2, however, where the couplers are being used as a means of removing splicing laps the bars can be manufactured with any available and transportable length of reinforcing bar. There is no requirement for any threading of the corresponding male bars (TSE) as these are supplied prefabricated with the corresponding metric parallel thread. There are no specialist tools required to complete the connection, this can be carried out using a simple open jawed pipe wrench. Euro Accessories can supply a calibrated wrench to ensure the correct torque settings are achieved. Benefits 1 Full CARES Technical Approval. Simplifies shutter design. Reduces damage to formwork. Makes stripping shuttering system easier. Ideal for use in continuous pour processes utilising climbing shutters. Eliminates the need for dangerous projecting reinforcement. No drilling of shuttering materials. Reduces the congestion of rebar at laps. Lack of congestion facilitates easier concrete placement, reducing the risk of voids. No post drilling of concrete in order to epoxy resin fix continuity bars. Provides a full bar strength coupling. Connection made utilising standard metric threads. Accelerates the production process. No requirement for thread cutting or assembling of products. Full tension lap bar lengths available from stock. Fabricated components can be bolted directly to the structure using standard metric fixings. No specialist tools required. Increasing the diameter of the bar to cut the male thread. Swaging the female threaded sleeve onto the reinforcement steel.

3 Reinforcement Couplers New_Layout 1 07/02/ :41 Page 4 Applications Stop ends. Stair landings. Cantilevered slabs. Vertical connections in columns. Column head connections. Wall intersections. Temporary openings in water retaining structures. Crane voids through slabs. Fixing points for additional steel structures and components. Provides reinforcement connections for future developments that may tie into the existing structure. Quality Assurance Manufactured by Terwa, PSA,TSE and PSC mechanical couplers have achieved accreditations as follows. TECHNICAL APPROVAL 50 TERWA Mobile Unit Can be placed on site to produce on site rebar connections. Any rebar length can be coupled. Utilises locally sourced reinforcement steel. Tested and certified accordance with domestic and international standards. KOMO EC Declaration of Conformity FS t

4 Reinforcement Couplers New_Layout 1 07/02/ :42 Page 5 Supplied as a straight reinforcement bar with sleeved and swaged female coupler body. Generally used in the first pour to allow subsequent addition of male continuity bar in the second pour. Can also be used in conjunction with nailing plates or threaded inserts to ease fixings to shutters. PSA Female Couplers Length Thread Dimensions L M (Metric) A D Coupler Dimensions L1 d Reinforcement Steel Tensile Force (kn) Rated Section (mm 2 ) PSA PSA PSA PSA PSA PSA PSA PSA PSA PSA PSA PSA PSA PSA PSA PSA PSA PSA PSA PSA PSA PSA PSA PSA PSA PSA This is the cast in part of the system, it comprises a socket swaged onto a high yield reinforcement bar. The socket area is larger than the bar ensuring that the bar itself is the weakest part of the coupler. Also available in Stainless Steel. 3

5 Reinforcement Couplers New_Layout 1 07/02/ :42 Page 6 Supplied as a straight male reinforcement bar, the threaded portion of the TSE is threaded into the exposed female section of the PSA once the shuttering has been removed. This provides the continuity reinforcement for the second pour. TSE Male Couplers Length Thread Dimensions L M (Metric) A d Reinforcement Steel Tensile Force (kn) Rated Section (mm 2 ) TSE TSE TSE TSE TSE TSE TSE TSE TSE TSE TSE TSE TSE TSE TSE TSE TSE TSE TSE TSE TSE TSE TSE TSE TSE TSE TSE TSE TSE Use PSA + PSC Connector for 40mm diameter reinforcement.(see next page) This is the screw in coupler. It has an enlarged threaded end to maximize the bar strength. t

6 Reinforcement Couplers New_Layout 1 07/02/ :42 Page 7 Position Coupler Thread (M) TSKM12 12 TSKM16 16 TSKM20 20 TSKM24 24 TSKM30 30 In many instances the male bars (TSE) cannot be threaded into position in the female coupler (PSA) mainly due to additional bends in the bar clashing with any adjacent rebar. The Position coupler is a simple method of connecting male and female bars without rotating any of the reinforcement steel. They are especially useful for connecting cranked starter bars, long lengths or large diameter reinforcement steel that can prove cumbersome to rotate or connecting prefabricated reinforcement cages in piles or columns. PSC Threaded Connector Description Thread Dimensions Metric (M) L PSC016 PSC Bolt PSC020 PSC Bolt PSC024 PSC Bolt PSC threaded connector is used for converting PSA couplers into male couplers. PSC030 PSC Bolt PSC042 PSC Bolt PSC048 PSC Bolt Instructions for utilising PSC Threaded Coupler Place in and rotate the threaded PSC Bolt into the PSA Coupler already cast into the concrete. Mount the second PSA Coupler. Torque Wrench Description TSEWR Wrench Rotate by hand the second PSA Coupler until the couplers are fastened together. table 1 Reinforcement Dia. Thread (M) Torque (Nm) The connection is finished by using a special torque wrench made by Terwa, to tighten the connection. The necessary torque for each type of rebar is shown in the table Cutting and Bending Service Euro Accessories also offer a Cutting & Bending service for the Terwa Coupler System. The production process is automated through the use of specialised machinery to enable high volume production. Advantages: No bending required on site. Eliminates manual handling risks. No site wastage. Quick delivery times. Bent bars from 10mm up to 40mm. 5

7 Reinforcement Couplers New_Layout 1 07/02/ :42 Page 8 Introduction The Alligator Couplers are used for splicing any grade or profile of reinforcing bar. These couplers are made for reinforcement steel with diameters in the range of 10mm to 40mm. Connection is made by inserting bars into both ends of the coupler. The shear bolts are then screwed by hand and tightened with either our electric or pneumatic impact wrench until bolts shear off. These couplers can be used in particular cases to replace the damaged reinforcement with full connection to the existing structure. Alligator Splicing Couplers Bar Dia. No. of Bolts Bolt Thread L d d1 H H1 H2 h h1 h2 SW Torque Bolts (Nm) ALC M ALC M ALC M ALC M ALC M ALC M ALC M ALC M ALC M ALC M ALC M ALC M Advantages: No need for threading or any other bar preparation. Fast, simple, and easy to use. No specialist skilled labour required. No welded components. Performs as a continuous piece of rebar. Allows for easy visual inspection. CARES Technical Approval. Electric Impact Wrench The Electric Impact Wrench easily achieves the correct torque setting to effectively fix the ALC Couplers in place. Description PTW Electric Impact Wrench Available to purchase or hire. t

8 Reinforcement Couplers New_Layout 1 07/02/ :41 Page 1 Branches: Euro Accessories Ltd (Head Office) Units 1-3 Shannon Industrial Estate Lodge Road Sandbach Cheshire CW11 3HP t f e.info@euroacc.co.uk Euro Accessories Ltd (Southern) Unit 3, Stewart Road Kingsland Business Park Basingstoke Hampshire RG24 8NF t f e.info@euroacc.co.uk Euro Accessories Ltd (Ireland) Strokestown Road Roosky Co. Roscommon N41 XW59 Rep. of Ireland t e.sales@euroacc.ie Euro Accessories Range: Plastic, Concrete & Wire Spacers Slab Accessories Magnet Systems Cast-in Channel Precast Accessories Screed Rails TJEP Rebar Systems Reinforcement Continuity Systems Formwork Systems & Accessories Piling Accessories Lifting & Fixing Systems Double Walling Accessories Chemicals & Sprayers BAG Column Formers