Background

 
Post-installed rebar connections have become a trusted, everyday solution in recent years. They are used in both retrofit work and in new construction – for a wide range of applications such as slab-to-wall connections, the anchoring of stair landings, connecting cantilever slabs with slabs, or anchoring columns in existing foundations.
 
However, the scope of application has so far been limited by the design method outlined in the Technical Report TR 023 / European Assessment Document EAD 330087, following provisions of AS5216 Appendix D & AS3600.
 
This means that moment-resisting reinforced concrete connections must be designed and executed as lap splicing. This, however, is not feasible in many cases where advance planning is required.

Technical Report TR 069 covers the design of post-installed, moment-resisting concrete connections

 
In the meantime, looking at international design methods, the European Organisation for Technical Assessment (EOTA) has developed the new post-installed rebar design method TR 069, which was published in the 2019 “Design method for anchorages of post-installed reinforcing bars (rebar) with improved bond-splitting behavior as compared to EN 1992-1-1”. This allows for the design of post-installed, moment-resisting reinforced concrete connections under static loading conditions without using a splice configuration.
 
This design method extends the area of application for post-installed rebars considerably and increases flexibility in your design.

The Australian Engineered Fasteners and Anchors Council (AEFAC) has recently published the Technical Note TN08 Vol2 titled "Improved bond-splitting behaviour" which aims to provide recommendations on moment resisting connections. The design recommendations are based on EOTA TR 069 and also states the design method is only applicable to products pre-qualified according to EAD332402.

HIT-RE 500 V4 and HILTI HIT-HY 200-R V3 : Qualified through EAD 332402-00-0601

 
To design with TR 069, the product used for post-installed rebar must be assessed following EAD 332402-00-0601 “Post-Installed Reinforcing Bar (Rebar) Connections with Improved Bond-Splitting Behavior Under Static Loading”. This includes methods and criteria to assess the real bond-splitting behavior of rebar systems, which, depending on the product characteristics, can be significantly higher than for cast-in rebars that adhere to Eurocode 2.



HIT-RE 500 V4 and HIT-HY 200-R V3 injectable mortar systems are qualified through EAD 332402-00-0601 and can thus be designed and executed by TR 069.
 
More product information of the HIT-RE 500 V4 can be found here.
 
More product information of the HIT-HY 200-R V3 can be found here.

Design TR 069 in a productive way: PROFIS Engineering

 
In addition to the approved HIT-RE 500 V4 and HIT-HY 200-R V3 injectable adhesive mortar systems, Hilti will also be introducing a concrete-to-concrete connection design module in the PROFIS Engineering software. Post-installed reinforced concrete joints will be calculated and documented quickly and easily, step by step.
 
If you would like to start using PROFIS Engineering and start design as per TR069, visit our webpage by clicking HERE

In the short future, design according to AS 3600 and AEFAC TN08 will also be available.
 

Summary

 
With TR069 & Hilti HIT-RE 500 V4 / HIT-HY 200-R V3 you enjoy the following advantages:
• A significantly increased variety of applications for post-installed rebar connections
• Flexibility in the planning of post-installed, rigid connections
• Higher loads and thus reduced anchorage depths
• Uniform design according to European standards and the latest technology
• A product qualified in accordance with ETA, with the associated PROFIS Engineering design software
 
If you would like to find out more then why not ask us in the Q&A forum or leave a comment below.