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CALTRANS – Standard and Criteria for Reinforcement Coupler CALIFORNIA DEPARTMENT OF TRANSPORTATION AUTHORIZATION ACCEPTANCE CRITERIA FOR MECHANICAL COUPLERS ON ASTM A706 and ASTM A615 REINFORCING STEEL   CALTRANS   Type of Test Required Why ! (Purpose of the test) What is the Criteria ? Static tensile strength test Tensile strength of the Rebar joint (Rebar to Coupler Splice) joint   >1.25Fy   Slip Test   Used to make sure that the plastic movement (slip) between the reinforcement bars with in the Mechanical Splice, when Loaded in tension   <=0.010 inch after applying 0.5fy loading   Uniform Cyclic Load Test (Seismic Elastic)   Used to make sure how a mechanical splice performs when subjected to alternating tension and compression loads for a given number of cycles. ...

What are Reinforcement Coupler's Reinforcement Coupler's are used to join Reinforcement bar's that are used in Reinforced concrete structures, as a replacement for conventional lapping method of joining Reinforcement bar's. Mechanical Splice / Coupler's are  mechanical connections between two pieces of reinforcing steel that enable the bars to behave in a manner similar to continuous lengths of reinforcing steel bars. Mechanical splice join rebar end-to-end, provides many advantages of a continuous piece of rebar. Mechanical Splice  system is used in connecting Reinforcement Bar of respective/ different diameter using the respective Coupler's as per applications and standards/criteria. All Coupler Standards  IS 16172 : 2014                 Click here.. ACI 318 / ACI 133              Click here.. BS 8110                         ...