Reinforcement Coupler
Reinforcement Coupler
(OP)
Hi,
We had a Contractor cut right through a #9 bar in a beam under repair. The bar is cut relatively near the existing lap.
Since development and lap splice lengths are rather significant for the large bar, we are considering a coupler to join the cut ends. What design considerations and/or restrictions do we need to be aware of? We are aware that the coupler needs to meet ASTM A1034, where coupler strength is required to be fy * 1.25.
Thanks!


We had a Contractor cut right through a #9 bar in a beam under repair. The bar is cut relatively near the existing lap.
Since development and lap splice lengths are rather significant for the large bar, we are considering a coupler to join the cut ends. What design considerations and/or restrictions do we need to be aware of? We are aware that the coupler needs to meet ASTM A1034, where coupler strength is required to be fy * 1.25.
Thanks!



RE: Reinforcement Coupler
Some of the mechanical couplers with screws that break off that are intended for repair work do not always have the guarantee that the breaking strength of the bar can be developed. This may or may not be an issue depending on the location and purpose of the bar.
RE: Reinforcement Coupler
CRSI ETN-M-1-14 "FAQs About Mechanical Splices"
www.SlideRuleEra.net
RE: Reinforcement Coupler
RE: Reinforcement Coupler
As Erico states, this is one of the most tested systems in engineering history.
RE: Reinforcement Coupler