BARQ Rebar Coupler

Efficient Splicing for All Rebar Sizes

BARQ Rebar Couplers are designed to join the reinforcement bars. The traditional method of connecting reinforcement bars with lap joints continuity in reinforced concrete need not be always appropriate. Advantages of simplicity and economy in lap splicing is limited to smaller diameter bars. Sanfield mechanical couplers offer the solution for splicing for all diameter bars ranging from 12mm to 40mm.

Technically Superior

BARQ Rebar Couplers performs like continuous reinforcement, develops strength mechanically, independent of concrete. Therefore provides ductility in RCC structures independent of condition of concrete. Proven cyclic performance of rebar offers strength during man-made, seismic or other natural events.

BARQ Rebar Couplers reduce rebar congestion and improve concrete flow & consolidation. Offer greater flexibility in design options. The simplicity in detailing of reinforcement, particularly in reinforcement congestion zones minimizes the reinforcement fixing errors, detailing and fixing of seismic reinforcement becomes effortless. Workability with higher steel-to-concrete ratio allows optimum sizing of RCC structural members.

Ths BARQ Rebar Couplers increase production rates because of reduced installation time and simpler quality control requirements. Because of these differences, Labour requirements and costs will be substantially reduced.

Benefits

Practical and economical alternative to laps
ast cycle time: 30 second per thread
One standard coupler for all splicing requirements (Standard/Position)
Easy installation, no torque wrench required
Shortens construction cycle times
Manufactured under strict quality assurance plan ISO 9001

A four steps operation with maximum output and performance

Applications

BARQ Rebar Couplers are used for mechanically joining reinforcement bars in concrete structures, eliminating the need for lap splicing. They are widely applied in bridges, tunnels, high-rise buildings, metro and railway infrastructure, power plants, and precast construction. Ideal for congested reinforcement zones, BARQ couplers enhance structural integrity, reduce bar congestion, and allow for phased construction. They support seismic-resistant designs and are essential for large-diameter bars and dynamic load zones. Their use also contributes to material savings, time efficiency, and improved site safety, making them a preferred solution in modern reinforced concrete construction projects.

BARQ – Grout Couplers (GQ)

Grout Couplers (GQ)

BARQ – GQ is a mechanical splicing system with one threaded end specially designed for the connection of pre-cast concrete elements. These couplers have been designed to work with grouts commonly-available on the market place. Grouts must be non-shrink types, with a minimum compressive strength of 70 MPa.

BARQ – GQ has been tested with grouts from major manufacturers such as Sika, Parex-Davco, Fosroc and BASF which have a worldwide distribution network. However, attention is raised to the fact that such cement-based products are often produced locally from local raw materials, and that their properties vary depending not only on their origin, but also on climate conditions.

The threaded bar is used a reference for the rebar diameter. In case of Transition Splicing, please refer to the table in rebar cutting section to verify the model in use.

Advantages of Grout Couplers (GQ)

BARQ – GQ is used for the connection of two pre cast elements, use of pre cast elements increases the speed of construction.
As the threaded end is already embedded in concrete and non threaded end is open at other end there is no worrying about any kind of damage to threads due to various reasons like rusting.
The same coupler model can also be used for the connection of different diameters (transition splices).
It has the exact same traceability as BARQ.

Dimensions (GQ)

Grout Couplers (GQ)

Bar Size	A	B	C	D	E	Min. rebar Engagement length	Max. rebar engagement length
12	73	44	182			143	155
16	73	44	182			145	155
20	77	48	195	25	20	150	160
25	80	50	220			165	180
28 & 32	93	62	290			225	240
36 & 40	107	72	340			270	285

Installation Procedure at the Factory (GQ)

Connect the coupler to the bar (GQ)

Check from the coupler marking that the coupler corresponds to the bar size.
Remove the Thread Protection Cap from the threaded bar (if any) and the Coupler Protection Cap (if any).
Inspect the threads of both the bar end and the coupler. Clean any rust or dirt with a wire brush.
Screw the coupler onto the threaded bar until no thread is visible.
Make sure the dust protection cap intact and firm. Position coupler flush with the formwork.
Rotate the coupler so that the grout inlet and outlet face the right direction. Now lock the coupler with the reinforcement with the use of binding wire.

Install the inlet and outlet pipes (GQ)

For each coupler, make sure that the inlet and outlet pipes have the proper length to reach the internal face of the formwork at the desired location.
Remove the plugs and insert the pipes into the inlet and outlet of the couplers. At this stage, it should not be possible to remove the pipes by hand anymore.
Check that there is no gap between the pipes and the openings. Use any kind of sealant or glue to close gap(if any).
Close the opposite end of both pipes with inlet/outlet pipe plug or any kind of adhesive tape.
Check that the pipe plugs are tight enough so that they won’t fall off during handling.

Casting of the concrete element (GQ)

Close the formwork.
Check that the couplers are tightly fixed, so that vibration due the concrete compactor won’t cause them to move.
Check the tightness of inlet and outlet pipes are facing the desired direction. Check that the Dust Protection Cap and the pipe plugs are flush with the formwork.
Mark the location of all couplers and their inlet and outlet pipes on the external face of the formwork.
Check the length of reinforcing bar that emerges from the formwork on the opposite side (taking into account the thickness of the formwork). Make sure it is within the range of engagement length.

Formwork removal & inspection (GQ)

Once the concrete is cured, remove the formwork and locate all couplers.
Remove the Dust Protection Cap and pipe plugs and check that no cement paste has penetrated inside the coupler even check for the presence of any type cement slurry on the inside face of each coupler.
Immediately clean if any unwanted material using water.
After inspection, seal inlet and outlet opening with grouting plugs.

Installation procedure at construction site (GQ)

Vertical applications – By injection (GQ)

Compare the dimensions of the foundation with the drawings. Make sure that any misalignment is within the tolerances allowed.
Clean the protruding bars of any cement or dirt.
Make sure that the surface of the foundation is clean. Sweep out any dust and residues.
Put the sealing discs over the top of the protruding rebars and push them down by 2.5 to 5 cm (1 to 2 inches) from the bar ends.
Ensure that the sealing discs are not in contact with the foundation before installation.
Select the panel to install and check the protruding lengths of its bars.
Lift the panel and position it on top of the foundation.
Check that the cavities inside the GQ couplers are clean. (Rust is no problem) Clean them with compressed air if necessary.
Prepare the bedding mortar and place the shim plates on the top of the foundation as required.
Lower the panel down and check its verticality with a spirit level.
Once the bedding mortar has hardened, inject cement grout into the GQ couplers.

Vertical applications – By gravity (GQ)

Compare the dimensions of the foundation with the drawings. Make sure that any misalignment is within the tolerances allowed.
Remove the protection caps from the GQ couplers and check that the coupler cavities are clean. (Rust is no problem) Clean them with compressed air if necessary.
Make sure that the surface of the foundation is clean. Sweep out any dust and residues. Select the top element to install.
Lift the element and position it on top of the foundation.
Prepare the formwork around the grouting area.
Put the bedding mortar and place the shim plates on top of the foundation as required.
Lower the element down and check its verticality with a spirit level.
Clean the excess grout after installation.

Horizontal applications – by injection (GQ)

Compare the dimensions of the precast elements to the drawings. Make sure that any misalignment is within the tolerances allowed.
Check that the cavities inside the GQ couplers are clean. (Rust is no problem) Clean them with compressed air if necessary.
Make sure that the surfaces of both elements are clean. Wipe out any dust and residues.
Lift the second concrete element and position it in front of the first element.
Move the sealing discs completely against the mouth of the GQ couplers.
Push the second element to its final position against the first element.
Check the level and alignment of both elements.
Prepare the formwork around the grouting area.
Put bedding mortar to seal the gap between the two elements.
Once the bedding mortar has hardened, inject cement grout into the GQ couplers.
Put the sealing discs over the top of the protruding rebars and push them down by 1”- 2” from the bar ends.
Make sure that the sealing discs are not in contact with the concrete face.