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Introduction

IS 1785 (Part 2): 1983 is a significant standard under the Bureau of Indian Standards (BIS), focusing on plain hard-drawn steel wire used in pre-stressed concrete. The standard specifically covers the 'as-drawn' form of wire, which is drawn to the required dimensions but has not undergone stress-relieving treatment. BIS certification, represented by the ISI mark, assures consumers and manufacturers that the wire complies with stringent quality and performance standards required for use in concrete reinforcement.

Why is BIS Certification Necessary for Plain Hard-Drawn Steel Wire for Pre-Stressed Concrete (As-Drawn Wire)?

BIS certification ensures that plain hard-drawn steel wire used for pre-stressed concrete meets vital mechanical properties such as tensile strength, flexibility, and durability. For 'as-drawn' wire, the certification ensures that the wire is suitable for pre-stressed concrete applications and can withstand the required tension without failure. BIS certification guarantees that the wire is of the highest quality, which is essential for ensuring the safety and longevity of reinforced concrete structures.

Overview of Indian Standard IS 1785 (Part 2): 1983

IS 1785 (Part 2): 1983 outlines the requirements for plain hard-drawn steel wire used in pre-stressed concrete, specifying key aspects such as tensile strength, flexibility, and material quality. The wire must meet stringent tensile strength standards to withstand high stress without failure, while also possessing adequate flexibility for proper tensioning in concrete reinforcement. The standard ensures uniformity through precise dimensional tolerances and mandates the use of high-quality materials, free from defects. It also includes provisions for proper packaging and identification to protect the wire during transport and maintain traceability for quality assurance..

Process for BIS Certification

The process of obtaining BIS certification for plain hard-drawn steel wire under IS 1785 (Part 2): 1983 involves several steps to ensure compliance with the required quality standards:

1. Application Submission: Manufacturers submit an application form along with technical specifications of the wire.
2. Document Review: BIS reviews the submitted documents to verify compliance with IS 1785 (Part 2): 1983.
3. Factory Inspection: BIS inspects the manufacturing facilities to ensure that the production process adheres to the required quality and safety standards.
4. Sample Testing: Samples of the wire are tested in BIS-approved laboratories to ensure they meet the necessary mechanical and physical properties.
5. Certification Grant: Once the wire passes the required tests and inspections, BIS grants certification, allowing the manufacturer to display the ISI mark.

Documents Required for BIS Certification

Manufacturers must provide the following documentation when applying for BIS certification:

• Application form for certification
• Technical specifications and test results for the wire
• Details of the manufacturing process and quality control measures
• Test reports from BIS-approved laboratories
• Factory layout and equipment details
• Proof of business registration
• Declaration of compliance with IS 1785 (Part 2): 1983

BIS Documents For Domenstic and Foreign Manufacturer Check

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Conclusion

Obtaining BIS certification under IS 1785 (Part 2): 1983 for plain hard-drawn steel wire is essential to ensure that the wire meets the required mechanical properties and safety standards for use in pre-stressed concrete applications. This certification guarantees that the wire is strong, flexible, and durable enough for critical construction projects. EVTL India offers expert consultancy services to guide manufacturers through the BIS certification process, helping them ensure their products meet national standards and are market-ready.