Ultra Coupler
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Features
- A field-installed rebar coupler that connects rebar without separate threading.
- Applicable to weldable and special seismic rebar.
- Meets KS D 0249 requirements for uniaxial tensile, low-cycle fatigue and residual-deformation (static strength) testing.
- Minimizes residual and initial deformation to 0.3 mm or less.
- Complies with the national concrete construction specification and Korea Expressway Corporation inspection criteria for rebar joints.
- With knobs and sleeves preassembled on movable rebar, installation can be completed on site in less than one minute.
Specifications
| Type | L1 | L2 | D1 | D2 |
|---|---|---|---|---|
| D13 | 42.0 | 24.5 | 28.5 | 15.5 |
| D16 | 51.5 | 29.5 | 34.0 | 19.0 |
| D19 | 62.5 | 38.0 | 42.0 | 22.5 |
| D22 | 68.5 | 43.5 | 48.0 | 26.5 |
| D25 | 78.0 | 49.0 | 54.0 | 29.0 |
| D29 | 81.0 | 54.5 | 62.0 | 32.5 |
| D32 | 92.0 | 61.0 | 67.0 | 36.5 |
| Tolerance | ± 2 | ± 1.5 | ± 1.5 | ± 1.5 |
Unit: mm ※ Dimensions may change due to product improvement or manufacturing process changes.
Components
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Coupler
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Thread Sleeve
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Jaw Sleeve
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Knob
Installation Steps
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1. Insert the coupler and jaw sleeve onto one rebar in sequence.
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2. Position the knob firmly after the first rib of the rebar.
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3. Hand-tighten the jaw sleeve and knob. Repeat loosening and tightening in the reverse direction two to three times for complete fixation.
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4. Tighten the thread sleeve and knob on the opposite rebar in the same way.
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5. Assemble and lock the coupler and thread sleeve, then use a pipe wrench to tighten until the rebar is fully secured.
Installation Video
Ultra Coupler for Fishbone-Type Rebar
