The ultimate level is the development of the real existing, “actual” strength and ductility of the rebar, i.e. 100% continuity – no weak link – high performance!
This should be required for structures with high demands to robustness.
The development of the actual ductility (or at least a large portion of it) can be specified:
- for headed bars by referring to ISO 15698, category B3
- for mechanical couplers by requiring the development of Agt,spec outside the splice or a strength of at least 130% fy,spec