GENERAL
Unbonded pc strand is prestressed concrete wire strand with corrosion-resistant lubricating grease or wax, and polyethylene sheathing (HDPE) .
Standard: ASTM A416, BS5896, prEN 10138, AS1311, GB/T 5224;or quivalent
Tensile Strength:1670Mpa, 1700Mpa, 1770Mpa, 1820Mpa and 1860Mpa etc.
Diameter: 9.50mm-17.80mm
Structure: Commonly 1x7 wire.
Application:
PC steel strands unbonded are mainly used for prestressed steel structure and construction of cable-stayed bridges.
Common Specifications
| Standard |
Unbonded pc strand |
Weight of oil (g/m) Not less than |
Thickness of PE (mm) Not less than |
Friction factor u |
Coefficient of effect on friction(K) | ||
| Nominal diameter (mm) |
Area of section (mm) |
Tensile strength (MPa) |
|||||
| JG161-2004 | 9.50 |
54.8 |
1720 1860 1960 |
32 | 0.8 | 0.04-0.10 | 0.003-0.004 |
| 12.7 |
98.7 |
1720 1860 1960 |
43 | 1.0 | 0.04-0.10 | 0.003-0.004 | |
| 15.24 | 140 |
1570 1670 1720 1860 1960 |
50 | 1.0 | 0.04-0.10 | 0.003-0.004 | |
| 15.7 |
150 |
1770 1860 |
53 | 1.0 | 0.04-0.10 | 0.003-0.004 | |
| Customised specifications accepted. | |||||||
SPECIFIC PRODUCTS
Unbonded PC Strand - 12.7mm
PC unbonded strands exported to Iran:
Unbonded PC Strand product with the following specifiction:
12.7mm Dia, with the Tensile Strength of 1860
Quality: ASTM A 416-2005 GRADE 270 with anchors
PC Strand Unbonded - 1/2 " (12.7 mm) for post-tensioned concrete floors, low relaxation, astm a416
Wire strands exported to COLOMBIA
Specifications:
Monostrand unbonded 1/2"
Low relaxation - grade 270 ksi
Quality: Astm a416
Nominal diameter (12.7 mm)
Nominal weight 0.52 lbs/ft (0.775 kg/m)
Maximum load effort 270.000 psi (1861 mpa)
Strength grade(mpa) 270.000 psi (1861 mpa)
Nominal sectional area(mm2) 0.153 inch2 (98.71 mm2)
Yield load(kn) 41.3 kips (183.7 kn)
12.7mm PC Unbonded Strand - material for POST TENSION UNBONDED.
Strand exported to Middle East
Specifications:
PC. Unbonded strand 12.7mm
Application: POST TENSION
PC STRAND and Fitting Anchors
Strands exported to
The Netherlands
Quality:
PC strand,
ASTM A 416-2005 GRADE 270
Mono round anchor and wedges
ASTM A 536 80-55 06
Anchor for 12.7mm pc strand
ASTM A 536 80-55 06
Application: POST TENSION
Unbonded PE coated pc strand of 1x7 wire, 1/2 " (12.7 mm), retardant material
Unbonded PC strand - 15.24 mm Unbonded 7 ply wire strand
Coated unbonded steel strand exported to India for infrastructure projects.
Grease Filled, PE Sheathed 15.24 mm Unbonded 7-wire strand PC strand, 1860MPa Tensile strength, confirming ASTM A416/A416M -06 Standards.
Tech Parameters:
| Sl | Characteristics | Standards | Acceptance Criteria |
| 1 | Diameter | IS 14268 / 1995 | 15.20mm (-0,1 + 0,2 mm) |
| 2 | Breaking load | IS 14268 / 1995 | ≥ 260.7 kN |
| 3 | Elastic Limit 0.1% | IS 14268 / 1995 | ≥ 234 kN |
| 4 | Modulus of Young | IS 14268 / 1995 | 195 kN/mm² (± 5%) |
| 5 | Elongation at max. Load (Lo>500 mm) | IS 14268 / 1995 | ≥ 3.5% |
| 6 | Straightness | NF A 35-035 | ≤ 20mm/1m |
| 7 | Cross-section area | NF A 35-035 | 140mm² (± 2%) |
| 8 | Wire striction | NF A 35-035 | Visual ductile break |
| 9 | HDPE Thickness | NF A 35-035 | ≥ 1 mm |
| 10 | Outer Diameter | NF A 35-035 | ≥ 17.50mm |
| 11 | Grease weight (g/mt) | NF A 35-035 | ≥ 50 gr/m |
| 12 | HDPE color | Black |
Unbonded PC Strand, exported to Pakistan
PC strand unbonded in size 15.24mm grade 1960.
Low Relaxation Unbonded PC Strand
12.7 mm Strand 1860 S7 Grade 270 A 416/A 416M
Relaxation value: Low
Exported to Dubai
Unbonded PE Coated PC Steel Stranding Wire
Exported to INDIA for Post Tension Service provider.
PE extruded grease filled Unbonded PC strand as per ASTM A416 Grade.
Wire as per PTI classification
Wire Size: 12.70 mm
Unbonded Steel Wire Strand
Exported to Croatia
Size: UNBONDED PC STRAND 15.7 mm
Exported in container 20", 24 tons load.
Application: HDPE sheathed stay cable for suspension bridges
PE Coated Galvanized Wire PC Strand for Construction
PC Strand (Strands used to Pre-stress concrete structures), exported to Brazil
Specifications:
Corrosion protection: grease filling, plus HDPE Coated (High Density Polyethylene)
Nominal Diameter: 12.7 mm
Area of section: Min. 98.7 mm2
Tensile strength: Min. 1860 MPa
Weight of oil: Not less than 37 g/m
Thickness of PE: Not less than 1.0 mm
Friction factor: 0.06 – 0.07
Mass: 890kg/km
Standard: ASTM A416
PC Strand - Wire Rope for Bridge Construction
Strand cable with PE sheathing, exported to Indonesia.
Tensile strength: 1670 MPa
Core: 6x36
Max elongation: 4% L
Modulus Young: (1.95-2.1) x 105 MPa
Application: Suspension multi strand cable system
Quality: High fatigue and corrosion resistance
Supplied with clamps, uv resisting stay pipe, anchorage
Corrosion resisting: The strand wires are zinc coated galvanized, then filled with wax or grease, also sheathed by HDPE
COMMON PACKING FOR SEVEN WIRE STRAND UNBONDED
Packing:
Weight per coil: Aprox 2100 kg
Inner Diameter: 76 cm
Outer Diameter: 130 cm
Coil Width: 79 cm
Wrapping: Kraft Paper and plastic cloth