Unbonded PC Strand

High-performance prestressed concrete strand coated with corrosion-resistant lubricating grease and polyethylene (HDPE) sheathing — engineered to international standards for post-tensioned slabs, foundations, high-rise buildings and infrastructure.

Home › Products › Unbonded PC Strand

Unbonded PC Strand Overview

Unbonded PC strand is coated with corrosion-resistant lubricating grease and polyethylene sheathing (HDPE). Compliant with ASTM A416, BS5896, prEN 10138, AS1311, GB/T 5224 and equivalent international standards.

Key Specifications

Standards ASTM A416, BS5896, prEN 10138, AS1311, GB/T 5224 or equivalent
Tensile Strength 1670 MPa, 1700 MPa, 1770 MPa, 1820 MPa, 1860 MPa and above
Nominal Diameter 9.50 mm – 17.80 mm
Construction 7-wire strand (1×7 configuration)
Coating Corrosion-resistant lubricating grease + HDPE (polyethylene) sheathing
Friction Factor (µ) 0.04 – 0.10
Friction Effect Coeff. (K) 0.003 – 0.004
Standard Reference JG161-2004 (Chinese standard for unbonded PC strand)

Product Gallery

Unbonded PC Strand coils
Epoxycoated Strand
Unbonded Strand reel

Cross-Section Structure

Three-layer construction providing maximum corrosion resistance and reduced friction for post-tensioned concrete applications

Layer Composition

Grease
Corrosion-resistant lubricating grease fills the interstices between wires, minimising friction losses
PC Strand
High-tensile 7-wire steel strand core — the primary load-bearing element
HDPE Coated
High-density polyethylene (HDPE) outer sheathing providing physical and chemical protection

Unbonded Strand Specifications

Standard ASTM A416, BS5896, EN 10138, AS1311, GB/T 5224
Tensile Strength 1670 MPa, 1700 MPa, 1770 MPa, 1820 MPa & 1860 MPa
Diameter Range 9.50 mm – 17.80 mm
Construction 7 wires (1×7)
Application Prestressed steel structures, post-tensioned buildings and cable-stayed bridges
Standard Ref. Unbonded PC Strand Standard JG161-2004

Common Specifications – JG161-2004

Standard unbonded PC strand specifications per Chinese standard JG161-2004

Unbonded PC Strand – JG161-2004 Specification Table

Standard Unbonded PC Strand Weight of Oil (g/m)
Not less than		 Thickness of PE (mm)
Not less than		 Friction Factor µ Coefficient of Effect on Friction (K)
Nominal Diameter (mm) Area of Section (mm²) Tensile Strength (MPa)
JG161-2004 9.50 54.8 1720 32 0.8 0.04 – 0.10 0.003 – 0.004
1860
1960
12.7 98.7 1720 43 1.0 0.04 – 0.10 0.003 – 0.004
1860
1960
15.24 140 1570 50 1.0 0.04 – 0.10 0.003 – 0.004
1670
1720
1860
1960
15.7 150 1770 53 1.0 0.04 – 0.10 0.003 – 0.004
1860
We are able to supply according to your specific requirements.

Applications

Unbonded PC Strands are used across a wide range of prestressed structural and civil engineering projects

Prestressed Steel Structures

Primary reinforcement for a wide variety of prestressed steel structural systems

Rail & Road Bridges

Variety of railway and road bridges, overpasses and cable-stayed bridge construction

High-Rise Buildings

Factory plants, high-rise buildings and prestressed construction projects

Building Foundation Columns

Variety of building foundation columns and reinforcement transformation works

Nuclear Power Stations

Shell safety of nuclear power stations requiring stringent corrosion protection

Towers & Silos

Television towers, water towers, concrete silos and sewage treatment structures

Water Conservancy & Hydropower

Rock anchoring, water conservancy and hydropower projects

Concrete Structures & Poles

Pre-stressed concrete structures, poles, water pipes, crane beams, hollow floor slabs and large plates

Applicable Standards

Unbonded PC Strand manufactured and tested in compliance with major international and regional standards

ASTM A416
American Standard for Low-Relaxation Strand
BS 5896
British Standard for High-Tensile Steel Wire Strand
prEN 10138
European Standard for Prestressing Steels
AS 1311
Australian Standard for PC Strand
GB/T 5224
Chinese National Standard for PC Strand
JG161-2004
Chinese Industry Standard for Unbonded PC Strand