What is a rebar coupler?
Rebar couplers are components which connect two reinforcing bars in longitudinal direction, forming a mechanical splice. This is an alternative to lap splices or welded connections.
Mechanical splices are used to avoid protruding bars in casting joints, reduce congestion in confined spaces and to save rebar length.
Rebar couplers are manufactured and attached to the rebar with different technologies and have therefore different characteristics, such as tensile capacity, robustness under real site conditions, the ease of the assembly and control of the correct installation. It is important to consider these characteristics f to make a good choice.
HRC rebar couplers
HRC400 rebar couplers fulfill the highest demands to the product type. The coupler creates a mechanical splice which is stronger than the rebar. This high performance:
- allows the transfer of the full strength and strain of the rebar
– let the rebar develop its full ductility (the result is like an unspliced bar)
- improves flexibility for the designer for the location of splices
The structural performance of HRC400 is combined with a user-friendly design which offers several advantages for the practical use on site. This is important as correct installation is crucial for the result – the mechanical splice.
Advantages offered by HRC400 Series rebar couplers
"Don’t make the splice your weak link".
HRC400 series – tested and documented high performance
HRC400 rebar couplers are certified acc. ISO 15835, for category B, F and S by Kontrollrådet, a Norwegian notified body, and by UK Cares acc. TA1-B&C.
The HRC400 Series fulfils the technical requirements of other European standards and certification schemes as well. Examples are:
- BS 8597 (UK)
- "DIBt: Grundsätze für Zulassungs- und Überwachungsprüfungen von mechanischen Betonstahlverbindungen" (Germany)
- Kiwa BRL 0504 (The Netherlands)
- NF A35-020 (France)
- BY4B (Finland)
- "Boverkets handbok om betongkonstruktioner - BBK” (Sweden).
Fulfilment of applicable requirements can be proven directly by the existing certifications and test results. Tensile test result consistently in rupture of the rebar, i.e. the coupler is NOT limiting the capacity of the connection - regardless of the actual rebar strength - since the ultimate tensile stress is above 700 MPa.
|Technical aspect||Performance of HRC400 Series|
|Strength||Rm,act - (full actual rebar strength)|
|Ductility||Agt,act - (full actual elongation)|
|Fatigue||fulfils the requirements (+ S/N-curve)|
|Seismic performance||fulfils the requirements|
Additional to the common criteria, like slip and tensile strength, seismic and fatigue performance, HRC400 Series Rebar couplers are successful tested under low temperatures (-40°C).
HRC400 Series rebar couplers
|Rebar diameter||Ultimate tensile capacity||Sleeve and Tread dimensions|
|Ø||A||B||C||D||E||F max||G max|
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