Rebar Coupler Latest IS Code In India

Here is the latest status (as of 2025) regarding IS-code for rebar couplers (mechanical splices) in India:

✅ Applicable IS Code (latest) for Rebar Couplers

  • The relevant standard is IS 16172 — “Reinforcement Couplers for Mechanical Splices of Bars in Concrete — Specification”.

  • IS 16172 was originally published in 2014.

  • In 2025, under a “Quality Control Order” (QCO) issued by the government through Bureau of Indian Standards (BIS), couplers for mechanical splices must comply with IS 16172:2023 — implying a revision or reaffirmation of the standard.

📄 What IS 16172 covers

  • It defines requirements and tests for mechanical splices (couplers) to join reinforcement bars (rebars) conforming to IS 1786 (the standard for high-strength deformed steel bars) up to grade Fe 550D. 

  • Performance criteria include: static tensile strength, ductility, slip (residual elongation under load), cyclic tensile loading, low-cycle fatigue, and optionally high-cycle fatigue (for structures subject to cyclic loads: bridges, seismic regions, etc.). 

  • Couplers must be clearly marked with manufacturer’s name, batch number, nominal size, grade of rebar, and the BIS Standard-Mark (or licence mark) to ensure traceability. 

⚠️ Limitations & Scope

  • IS 16172 (as originally drafted) is applicable for couplers used with rebars of grade up to Fe 550D.

  • For rebars higher than Fe 550 (e.g. Fe 600), the standard does not yet provide explicit requirements — use in such cases must be agreed between user and manufacturer or follow additional design-verification protocols. 

🆕 Recent Regulatory Update (2025)

  • The “Quality Control Order, 2025” (for “Reinforcement Couplers for Mechanical Splices of Steel Bars in Concrete”) mandates that all couplers — new or existing — must comply with IS 16172 : 2023 and carry the Standard Mark under BIS Licensing. 


  • That means going forward, for approval, purchase or inspection (especially for government/large-scale projects), couplers should meet the updated 2023 standard requirements.

✅ What this means for you (in Mumbai / India)

  • When procuring or specifying rebar couplers, always check that they are certified to IS 16172:2023 (or at least IS 16172), and that they have the BIS Standard Mark.

  • Ensure that couplers are tested for tensile strength, slip, cyclic/fatigue loading as per IS 16172 requirements — especially for high-rise, seismic-zone or heavy-load structures.

  • Specify rebar grade (e.g. Fe 500 / Fe 550) — since IS 16172 scope is limited up to Fe 550D.


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