Contact Info
- Tel: +86-311-87813582
- Fax: +86-311-87829648
- Email: Kaiwork@126.com
- Whatsapp: +86 86 138 3318 2035
- Add: No.345, Youyi North Street, Shijiazhuang City, Hebei Province, China.
Heavy-Duty Post-Tensioned Infrastructure Grade. Engineered in strict compliance with ASTM A416 Grade 270 and PTI specifications, our 15.24mm (0.6 inch) unbonded prestressed concrete steel strand features high-performance anti-corrosion grease and a robust HDPE protective sheath, delivering ultimate breaking load performance, superior corrosion resistance, and certified compliance for advanced civil engineering.
15.24mm (0.6 inch) Unbonded PC Strand | Grade 270 Greased & Sheathed PC Strand
​Designed for critical heavy-load post-tensioned floor systems, transfer slabs, and high-capacity ground anchors under ASTM design codes. Every coil adheres to rigorous mechanical benchmarks.
|
Technical Parameter |
Specification Value |
Governing Standard |
|
Nominal Diameter |
15.24 mm (0.600 inch) |
ASTM A416 / A416M |
|
Strand Configuration |
7-Wire (1 Center Wire + 6 Helical Outer Wires) |
ASTM A416 |
|
Nominal Cross-Sectional Area |
140.0 mm² (0.217 in²) |
ASTM A416 |
|
Specified Tensile Strength |
Grade 270 (1860 MPa) |
ASTM A416 |
|
Minimum Breaking Load (MBL) |
≥ 260.7 kN (58,600 lbs) |
ASTM A416 |
|
Coating & Sheathing |
Anti-Corrosion Grease + Extruded HDPE/PP Sheath |
ASTM A960 / PTI Specs |
|
Relaxation Class |
Class 2 (Low Relaxation, Max 2.5% at 1000h) |
ASTM |
· ​ASTM A416 Certified Compliance: The base steel strand is manufactured strictly to meet the mechanical, geometric, and breaking load requirements of ASTM A416 Grade 270.
· ​Heavy-Duty Multi-Layer Protection: Uniformly coated with specialized microcrystalline anti-corrosion grease and tightly encased in a seamless, high-density polyethylene (HDPE) sheath for lifetime durability.
· ​Maximum Load-Bearing Capacity: The 140.0 mm² cross-section and 260.7 kN MBL provide the robust tensile performance required for large-span slabs and heavy transfer girders.
· ​Low-Relaxation Stability (Class 2): Advanced thermal-mechanical stabilization restricts stress relaxation to a maximum of 2.5% at 1000 hours, ensuring permanent prestressing force retention over extended lifecycles.
​Engineered for heavy-load structures and modern high-rise civil projects:
· ​Commercial & High-Rise Buildings: Long-span floor systems, transfer plates, multi-story parking structures, and high-rise commercial towers.
· ​Heavy Industrial Structures: Large-span industrial floor slabs, heavy foundations, and specialized storage platforms.
· ​Geotechnical Engineering: High-capacity rock and soil anchor systems, slope stabilization, and foundation tie-backs.
​Q: Do these 15.24mm unbonded strands comply with ASTM A416 and PTI standards?
A: Yes. The base 7-wire strand complies strictly with ASTM A416 Grade 270, and the specialized anti-corrosion grease and HDPE sheathing meet relevant PTI (Post-Tensioning Institute) performance specifications.
​Q: What is the standard export packaging and container load?
A: Coils are securely strapped, wrapped in protective materials, and palletized to prevent damage to the plastic sheath during transit. A standard 20ft container loads approximately 20 to 27 metric tons.
​Q: Can we request third-party quality inspection prior to shipment?
A: Yes. We fully support independent pre-shipment inspections and audits conducted by recognized global agencies such as SGS, BV, Intertek, or TUV.
