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TxDOT – Standard and Criteria for Reinforcement Couplers TEXAS DEPARTMENT OF TRANSPORTATION AUTHORIZATION ACCEPTANCE CRITERIA FOR MECHANICAL COUPLERS FOR REINFORCING STEEL under DMS-4510   TEXAS DOT   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   Fatigue Loading Low Cycle Fatigue Test   The purpose of this test is to evaluate the performance of the splice reinforcement following significant  inelastic stress reversal fati...

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                         ...