IS 14268:1995
Steel and Iron - Uncoated Stress Relieved Low Relaxation Seven-ply Strand For Pre-stressed Concrete.
Summry
Uncoated stress relieved low relaxation seven-ply strand is a high-strength steel strand used in pre-stressed concrete structures. It consists of seven steel wires twisted together and heat-treated to reduce stress losses, providing excellent tensile strength, durability, and long-term load-holding capacity.
Why BIS Certificate is Mandatory for Uncoated Stress Relieved Low Relaxation Seven-ply Strand For Pre-stressed Concrete..?
BIS certification is mandatory to ensure the strand meets Indian Standards for strength, relaxation, ductility, and safety. As it is used in critical infrastructure like bridges and buildings, BIS approval prevents structural failure, ensures consistent quality, and protects public safety.
What is BIS Certified for Uncoated Stress Relieved Low Relaxation Seven-ply Strand For Pre-stressed Concrete.. ?
BIS certification is mandatory to ensure the strand meets Indian Standards for strength, relaxation, ductility, and safety. As it is used in critical infrastructure like bridges and buildings, BIS approval prevents structural failure, ensures consistent quality, and protects public safety.
Test required for Uncoated Stress Relieved Low Relaxation Seven-ply Strand For Pre-stressed Concrete..
| Title | Mandatory/Optional |
|---|---|
| Wire al | Optional |
| Surface condition | Required |
| Dimensions of Indentations | Required |
| Strand | Required |
| Joints | Required |
| Treatment of Strand | Required |
| Workmanship and Finish | Required |
| Nominal diameter, tolerance, nominal cross sectional area and nominal mass per unit length of strand. | Required |
| Straightness of Strand & Behavior During Cutting | Required |
| Breaking strength and 0.2 percent proof load | Required |
| Elongation | Required |
| Relaxation properties ( For 100 h duration) | Optional |
| Relaxation properties ( For 1000 h duration) | Optional |
Benefits of BIS Certification for Uncoated Stress Relieved Low Relaxation Seven-ply Strand For Pre-stressed Concrete..
1. Structural Safety Assurance BIS certification ensures the strand meets strict strength and relaxation limits, reducing the risk of cracks, failures, or collapse in prestressed concrete structures.
2. Consistent Quality Control Certified manufacturers follow standardized production and testing processes, ensuring uniform diameter, tensile strength, and long-term performance in every batch.
3. Long-Term Durability BIS-approved strands are tested for low relaxation and stress resistance, ensuring minimal prestress loss and longer service life of concrete structures.
4. Legal and Regulatory Compliance BIS certification is mandatory in India, allowing manufacturers and importers to legally supply material for infrastructure and construction projects.
5. Market Trust and Project Acceptance BIS-marked strands are widely accepted in government projects, EPC contracts, and private construction, enhancing brand credibility and business opportunities.