A division of

Jetaa Industries Private Limited

OBJECTIVE

To manufacture quality couplers and render threading services at the site on time without hindrance to the client’s schedule. We cater to the specific needs of construction of infrastructure and building sectors in and around India.

MANAGEMENT

The company is promoted and headed by Mr. T. Saran Kumar, a Structural Engineer by profession with vast experience in design and construction of R.C.C multistoried buildings who prides himself on the quality and services of the group. He is assisted by qualified, experienced, able and high performing team of engineers, technicians and others – each of them a thorough professional in their respective field of working.

WHY USE REBAR COUPLERS?

The Traditional method of lapped joints are not always an appropriate means of connecting reinforcing bars. Lapped joints are dependent upon the concrete for load transfer. The use of laps can be time-consuming in terms of design and installation and the increased amount of rebar creates congestion within the concrete.

Couplers are designed to mechanically join two bars together. By creating an end-to-end bar connection, a continuous load path is created from one bar to another that is independent of the condition and quality of the concrete. Mechanical splices are reliable under conditions of cyclic loading into the inelastic range and prove to be advantageous at the locations where inelastic yielding may occur.

TYPES OF COUPLERS, WE OFFER

ROLL TECH
COUPLERS

UPSETTING TECH
COUPLERS

BENEFITS
OF COUPLERS

  • Spliced rebar performs like continuous reinforcement due to the mechanical joint, unlike lapping which has a complete dependency on concrete.
  • Steel wastage is reduced significantly. Using couplers saves lap length steel. A 12m rebar can be divided into 3m or 4m as bars as required which also prevents the wastage of end pieces of steel.
  • Staggering of bars not required.
  • Bar cross-sectional area is not reduced.
  • Couplers used as a replacement to dowel bars which also saves formwork material.
  • Steel congestion is reduced due to the elimination of laps.
  • Using couplers provides superior cyclic performance as compared to lap joint.
  • Easy to install and no torque wrench required.

CONTRACTORS
PREFERENCE

For the contractors, usage of couplers reduces labour cost for installation and handling of steel. The construction schedule is improved and there is saving on valuable crane time on the project.

FEATURES
OF COUPLERS

  • EN8D material is used for manufacturing couplers.
  • Coupla™ reinforcing bar couplers having high carbon contents have high strength and in addition to greater thickness are more sustainable and effective.
  • Coupla™ reinforcing bar coupler helps to increase the pace of execution and the quality of projects.
  • It can simplify the design and construction of reinforced concrete and reduce the amount of reinforcement required, which is now a valuable national resource.
  • No torque wrench is required for assembling, Coupla™ reinforcing bar couplers. Hand tightening of the bar or coupler is sufficient.
  • Our couplers can be used in power plant, bridges and all types of R.C.C structures

MANUFACTURING PROCESS:

CUTTING

Rebar end needs to be cut perpendicular prior to threading as no allowance for additional threads.

COLD FORGING

Enlarging the rebar end by 10%-30% under hydraulic pressure.

THREAD ROLLING

Threads are formed by pressing the forged ends of the rebar using a set of rollers.

CODE SPECIFICATION:

In India, the structural consultant is free to define the code to which the couplers used for the project.

I. ACI: 318 – 2008:
1. Type 1 joint required to achieve 1.25Fy as a minimum, e.g: For Fe500 the tensile strength expected is at least 625 N/mm2 (Clause 12.14.3.4).

2. Type 2 required to comply with 1.25Fy requirement and also meet the specified tensile strength of the rebar. E.g: For Fe500 the ultimate stress expected from the same is at least 700 N/mm2.

II. BS 8110 – Part 1, Section 3, 1989:
1. Specifies tensile testing and slip test for the joint for acceptance of the sample.

2. Testing the coupler of a precise type, the permanent elongation after loading to 0.6fy should not exceed 0.1mm. E.g: For grade 460 the tensile strength should exceed 497 N/mm2.

III. IS 1786 – 2008:
1. Type 1 – For Fe500 is considered acceptable for use anywhere in the structure if it meets ultimate strength of 545 N/mm2 which is much lesser than the 1.25Fy. (Clause 8.1 –Table 3).

2. Type 2 – Condition becomes at least 625 N/mm2 as well.

IV. IS 16172 – 2014:
1. Manufacturers code for production of couplers.

2. Coupler to be designed for Fe550 grade.

3. Only tests recommended for acceptance on projects is static tensile tests.

4. Example, Fe500 rebar breaking at a stress of 580 N/mm2 is acceptable as per IS 1786 requirement of 545 N/mm2.

Civil Construction & Engineering services:

Leveraging on our rich experience, we are rendering services for various kinds of civil contractor jobs. We have trained consultants who have in-depth knowledge in this field and undertake residential, commercial and industrial civil work projects.

We do all kinds of civil works, electrical works, plumbing contract, structural consulting, architectural and interior & exterior works. We supply skilled labours for all types of RCC structures. Our team especially skilled in RCC Wall Structures (Mivan aluminium formwork). In order to provide these services to our valuable clients, we have a team of experienced and professional experts who have excellent exposure of respective services. Clients highly acclaim our service and can avail the offered service at cost-effective price.

Enquiry

Jetaa Industries Pvt.Ltd.,

#69, Shop No. 6, N.N. Complex,
Lalpagathur Nagar, Peelamedu,
Coimbatore-641004, Tamil Nadu, India

Branch Office

#16, 6th Main Road, Ram Nagar,
Velachery, Chennai – 600 042.