ISPLICE
Hydraulic Compression Coupler
No rotation required — engineered for congested cages
About ISPLICE
ISPLICE is Bosa's patented hydraulic compression coupler, designed specifically for situations where bar rotation is impossible — congested rebar cages, fixed-orientation bars, and retrofit applications. The coupler uses a proprietary steel-wedge-plate system activated by a portable hydraulic press, creating a permanent mechanical connection without any threading or rotation of the rebar. Despite its unique no-rotation mechanism, ISPLICE achieves full Type 2 ductility classification under HK CoP 2013 Cl. 3.2.8.4, passing all cyclic tension-compression test stages. This makes it the go-to solution for Hong Kong's most challenging structural connections.
Dimensional Specifications
All dimensions in millimetres. Weights in kilograms (approx.).
| Bar Size | Coupler OD (mm) | Length (mm) | Weight (kg) |
|---|---|---|---|
| Ø16 | 30 | 52 | 0.18 |
| Ø20 | 36 | 60 | 0.30 |
| Ø25 | 42 | 70 | 0.48 |
| Ø28 | 48 | 76 | 0.62 |
| Ø32 | 54 | 84 | 0.85 |
| Ø40 | 66 | 100 | 1.45 |
| Ø50 | 80 | 120 | 2.50 |
* Dimensions are nominal and subject to manufacturing tolerances. Contact Bosa for project-specific requirements.
Where to Use ISPLICE
Congested Rebar Cages
Primary application where bar spacing is too tight to allow rotation for threaded couplers. Common in deep beams, pile caps, and transfer structures.
Fixed-Orientation Bars
Starter bars cast into existing concrete where rotation is physically impossible. Typical in staged construction and top-down methods.
Retrofit & Remedial Works
Connecting new reinforcement to existing structures where bar ends are fixed in position and cannot be rotated.
Seismic-Critical Congested Zones
Beam-column joints and boundary elements where both Type 2 ductility and no-rotation installation are required simultaneously.
Installation Procedure
Bar Preparation
Cut rebar square and clean the bar end. No threading required — the bar is used as-is with the ISPLICE system.
Coupler Positioning
Slide the ISPLICE coupler over the first bar end until the bar reaches the centre stop. No rotation needed.
Second Bar Insertion
Insert the second bar from the opposite end until it contacts the centre stop. Bars are now aligned axially.
Hydraulic Compression
Position the portable hydraulic press and activate. The steel-wedge-plate system compresses to create a permanent mechanical lock.
Visual Verification
Confirm the compression indicator shows full engagement. The coupler surface marking verifies proper compression stroke.
Test Requirements
Standards & Codes
ISPLICE Advantages
No Rotation
The only Type 2 coupler in the Bosa range that requires zero bar rotation — critical for congested and fixed-bar scenarios.
Portable Equipment
Lightweight hydraulic press can be operated by a single worker in tight spaces. No heavy machinery required.
Full Ductility
Achieves Type 2 classification despite the compression mechanism — passes all cyclic test stages.
Visual Confirmation
Built-in compression indicator provides instant visual verification of proper installation.
Ready to Specify ISPLICE?
Contact our engineering team for project-specific guidance, technical data sheets, and quotations.
