Conventional straight-thread rebar couplers have a single thread direction, requiring at least one rebar to rotate during installation. However, in many real construction conditions, rebar rotation is physically impossible, making standard couplers unsuitable.

Typical problematic scenarios include:

• Bent (L-shaped) rebars
  At transfer floors, beam-column joints, cantilever beams, or final reinforcement closure, rebars are often bent into L or hook shapes, preventing 360° rotation.

• Fixed or pre-embedded rebars
  In shear walls, columns, foundations, or prefabricated components, rebars are already fixed in concrete and cannot be turned.

• High-density reinforcement zones
  Tight spacing between rebars leaves no room for rotation or tool operation.

In these situations, conventional single-thread couplers cannot be installed efficiently or at all.

Key Function: Connection Without Rotating the Rebars

The Forward–Reverse Thread Rebar Coupler is specifically engineered to overcome these limitations.

• One end uses a right-hand thread (clockwise tightening)

• The other end uses a left-hand thread (counterclockwise tightening)

How It Works

• During installation, only the coupler itself is rotated

• As the coupler turns, both rebars move simultaneously toward the center

• No rotation of either rebar is required

This mechanism enables precise, efficient, and controlled rebar alignment, even in fully restricted conditions.

Structural Performance & Reliability

• Fully complies with national and international rebar mechanical splice standards

• Connection strength and ductility are equivalent to standard straight-thread couplers

• Tensile performance meets or exceeds rebar base material requirements

• Ensures load transfer, seismic performance, and long-term stability

There is no compromise in mechanical performance, only a major improvement in constructability.

Key Advantages

✔ No rebar rotation required – ideal for fixed or bent rebars
✔ Fast installation – significantly reduces on-site labor time
✔ High reliability – consistent tightening and alignment
✔ Improved construction efficiency – fewer errors and rework
✔ Compatible with standard threading processes – easy integration on site

Typical Application Scenarios

The Forward–Reverse Thread Rebar Coupler is especially suitable for:

• Beam–column joints

• Shear wall concealed columns

• Transfer beams and structural conversion layers

• Pre-embedded rebar connections

• Reinforcement closure zones

• Structural strengthening and retrofit projects

• Renovation and extension of existing buildings

It is the preferred solution when:

• One rebar is already fixed

• Both rebars cannot rotate 360°

• Conventional couplers are difficult or impossible to install

Conclusion

The Forward–Reverse Thread Rebar Coupler provides a practical, standardized, and structurally reliable solution to one of the most common yet challenging problems in reinforced concrete construction—rebar connection under rotation-restricted conditions.