Precision Rebar
Connections for
Modern Construction
Hong Kong's leading mechanical coupler manufacturer with over 1,000 projects delivered. Code-compliant systems engineered for seismic, precast, and modular construction — now expanding across Australia, the United States, and Southeast Asia.
Mechanical Coupler Systems
Four purpose-engineered coupler systems covering every structural application — from standard splicing to seismic, precast, and congested-cage conditions. Proven across over 1,000 projects in Hong Kong and compliant with HK CoP 2013, AC133, and BS8110.
SERVISPLICE
Standard Normal Coupler
Threaded mechanical coupler for standard same-diameter or transition splicing. Full tensile strength with 30-second CNC threading. Proven across 1,000+ Hong Kong projects, compliant with HK CoP 2013 Cl. 3.2.8.3, AC133, and BS8110.
SEISPLICE
Standard Ductility Coupler
Passes cyclic tension-compression testing to Stages 1–3 (0.95fy, 2Ey, 5Ey). For seismic zones, columns, and CoP 2013 Cl. 9.9.1.2(e) / 9.9.2.1(e) locations. Engineered to meet international seismic standards as Bosa expands into new markets.
ISPLICE
Hydraulic Compression Coupler
Patented steel-wedge-plate system for congested rebar cages and fixed-orientation bars. No bar rotation required. Full Type 2 ductility performance, field-proven on Hong Kong's most demanding infrastructure projects.
GROUTSPLICE
Grout-Filled Coupler
Purpose-built for precast concrete and Modular Integrated Construction modules. Visual grout-fill confirmation via inlet/outlet ports. Nearly 60 years of grout-splice heritage, now being introduced to Australia, the US, and Southeast Asia.
Engineering Advantage
Bar-Break Guarantee
Every Bosa splice is engineered to exceed the tensile strength of the parent rebar. In failure testing, the bar breaks before the coupler — the definitive proof of connection integrity. Verified across more than 1,000 projects in Hong Kong.
Proprietary CNC Manufacturing
700-tonne CNC crimping press and dynamic rolled thread technology deliver consistent thread geometry and dimensional accuracy across every coupler in every batch — the same precision that made Bosa the market leader in Hong Kong.
Certified Quality Chain
ISO 9001:2015 manufacturing in Taiwan. SGS-tested raw steel at source. HOKLAS-accredited batch testing in Hong Kong. Full traceability from raw material to installed coupler — a quality system we are bringing to every new market we enter.
Complete Range Coverage
Full diameter range from Ø12 mm to Ø50 mm, including transition couplers for different-diameter splicing and grout-filled variants for precast and MIC applications. Available in both metric and imperial bar sizes.
Engineered for Every
Structural Condition
From standard column splicing to seismic-critical connections and modular construction, Bosa couplers are specified across the full spectrum of reinforced concrete applications — proven in Hong Kong and ready for international projects.
Precast Columns & Walls
GROUTSPLICE grout-filled couplers enable precise rebar positioning in precast elements with visual fill confirmation — a system proven across Hong Kong's precast construction sector.
MIC Modules
Modular Integrated Construction requires grout-filled couplers that accommodate module-to-module rebar connections with guaranteed fill — a growing method in Hong Kong and across the Asia-Pacific region.
Seismic Zones
SEISPLICE Type 2 ductility couplers pass cyclic tension-compression testing to Stages 1–3, meeting CoP 2013 Cl. 9.9 seismic requirements — critical for projects in seismically active regions worldwide.
Transfer Floors & Beam-Column Joints
High-stress transfer structures require full-strength Type 1 or Type 2 couplers with bar-break guarantee and Go/No-Go gauge inspection — a standard Bosa has upheld across over 1,000 Hong Kong projects.
Retrofit & Remedial Works
ISPLICE hydraulic compression couplers require no bar rotation, making them ideal for retrofitting existing structures with fixed-orientation rebar — a common requirement in ageing infrastructure across all markets.
Congested Rebar Cages
ISPLICE's patented wedge-plate system eliminates the need for bar rotation in densely reinforced sections where conventional threading is impractical — a solution developed for Hong Kong's high-density construction environment.
Verified to the Standard
Every Bosa coupler is manufactured and tested to meet or exceed the requirements of the Hong Kong Code of Practice for Structural Use of Concrete 2013, with full traceability through HOKLAS-accredited laboratories. As we expand into Australia, the US, and Southeast Asia, we are aligning with the relevant local standards in each market.
Non-Ductility Coupler
Cl. 3.2.8.3
Type 1 couplers (SERVISPLICE) must develop the full tensile strength of the connected bars in a static tensile test. The connection must be stronger than the bar — a bar-break result is the acceptance criterion.
Ductility Coupler
Cl. 3.2.8.4
Type 2 couplers (SEISPLICE, ISPLICE, GROUTSPLICE) must pass cyclic tension-compression testing across three stages, simulating seismic loading conditions. Required at all CoP 2013 Cl. 9.9.1.2(e) and 9.9.2.1(e) locations.
Batch Testing Schedule
All production batches are tested at a HOKLAS-accredited laboratory in Hong Kong. Specimen count scales with batch size to ensure statistical confidence. Equivalent third-party testing will be established in each new market.
| Batch Size | Specimens |
|---|---|
| ≤ 500 units | 3 specimens |
| 501 – 1,500 units | 6 specimens |
| > 1,500 units | 9 specimens |
Go/No-Go Gauge Inspection
Every coupler undergoes Go/No-Go gauge inspection prior to dispatch. Thread geometry is verified against dimensional tolerances to ensure field installation meets design intent. Non-conforming units are rejected and quarantined.
Bosa is actively pursuing compliance with ACI 318 (US) and AS 3600 (Australia) as part of our international expansion.
Hong Kong's
Market Leader,
Going Global
BOSA Technology (Hong Kong) Limited is the leading manufacturer of mechanical rebar coupler systems in Hong Kong, with over 1,000 projects completed across the territory. With Taiwan-based manufacturing operating to ISO 9001:2015 standards and HOKLAS-accredited testing in Hong Kong, Bosa combines precision engineering with rigorous quality assurance at every stage of production.
Our coupler technology draws on nearly 60 years of grout-splice heritage, continuously refined to meet the evolving demands of seismic design, modular construction, and high-performance structural concrete. Building on our proven track record in Hong Kong, Bosa is now expanding into Australia, the United States, and Southeast Asia — bringing the same bar-break guarantee and quality chain to international markets.
Request a Quote
Submit your project details and a Bosa technical representative will respond within one business day. We serve Hong Kong and are expanding into Australia, the US, and Southeast Asia.
Room 203A, 2/F, LT Tower
31 Chong Yip Street
Kwun Tong, Kowloon
Hong Kong
All Bosa couplers are supplied with full test certificates and batch traceability documentation for project records.