PC Strand
PC strands are composed of multiple roots of high strength steel wire. It is twisted wire rope. By eliminating stress(stabilizing treatment),the strands are suitable for prestressed concrete or similar purposes. It can help with saving material consumption.
| ASTM A 416: | |||||||||
| Grade | Normal Diameter(mm) | Tolerance(mm) | Area of section(mm2) | Theoretical Weight per 1000 metre | Minimum breaking strength(KN) | Minimum load at percent extension(KN) | Elongation(%) | Relaxation after 1000hrs at | |
| Initial load 70% | Initial load 80% | ||||||||
| 250 | 9.53 | +/-0.40 | 51.61 | 405 | 89.0 | 80.1 | 3.5 | 2.5 | 3.5 |
| 11.11 | 69.68 | 548 | 120.1 | 108.1 | |||||
| 12.70 | 92.90 | 730 | 160.1 | 144.1 | |||||
| 15.24 | 139.35 | 1094 | 240.2 | 216.2 | |||||
| 270 | 9.53 | +0.65 | 54.84 | 432 | 102.3 | 92.1 | 3.5 | 2.5 | 3.5 |
| 11.11 | -0.15 | 74.19 | 582 | 137.9 | 124.1 | ||||
| 12.70 | 98.71 | 775 | 183.7 | 165.3 | |||||
| 15.24 | 140 | 1102 | 260.7 | 234.6 | |||||
| BS5896 | ||||||||
| Strand type | Normal Dia.MM | Tensile strength(Mpa) | Specified breaking load(KN) | Load at 1% elongation(KN) | Minimum elongation at max load 1% | Relaxation Value 1000h | ||
| Initial load 60% | Initial load 70% | Initial load 80% | ||||||
| 7-wire standard | 9.3 | 1770 | 92 | 81 | 3.5 | 1 | 2.5 | 4.5 |
| 11 | 1770 | 125 | 110 | |||||
| 12.5 | 1770 | 164 | 144 | |||||
| 15.2 | 1670 | 232 | 204 | |||||
| 7-wire super | 9.6 | 1860 | 102 | 90 | 3.5 | 1 | 2.5 | 4.5 |
| 11.3 | 1860 | 139 | 122 | |||||
| 12.9 | 1860 | 186 | 163 | |||||
| 15.7 | 1770 | 265 | 233 | |||||
| 7-wire drawn | 12.7 | 1860 | 209 | 184 | 3.5 | 1 | 2.5 | 4.5 |
| 15.2 | 1820 | 300 | 255 | |||||
| 18 | 1700 | 380 | 323 | |||||
| JISG 3536 | |||||||||
| Strand Type | Nominal Diameter(mm) | Diameter Tolerance(mm) | Nominal Area(mm2) | Nominal Weight (KG/1000m) | Breaking Strength(KN min.) | Yield Strength(KN min.) | Elongation at Max Load Min. | Relaxation | |
| Initial Load Of Min Nominal Breaking Strength | 1000h Value No More Than | ||||||||
| 15-7AN | 9.3 | 0.4 | 51.61 | 405 | 88.8 | 75.5 | 3.50% | 70% | 2.50% |
| 10.8 | -0.2 | 69.68 | 546 | 120 | 102 | ||||
| 15-7AL | 12.4 | 92.9 | 729 | 160 | 136 | ||||
| 15.2 | 138.7 | 1101 | 240 | 204 | |||||
| 15-7BN | 9.5 | 54.84 | 432 | 102 | 86.8 | ||||
| 11.1 | 74.19 | 580 | 128 | 118 | |||||
| 15-7BL | 12.7 | 98.71 | 774 | 183 | 156 | ||||
| 15.2 | 138.7 | 1101 | 261 | 222 | |||||
| 15-19W 15-19L | 17.8 | 0.6 | 208.4 | 1652 | 387 | 330 | |||
| 21.8 | -0.25 | 312.9 | 2482 | 573 | 495 | ||||
| 28.6 | 532.4 | 4229 | 949 | 807 | |||||
| AS/NZS4672 | ||||||||||
| Strand type | Normal Dia.(mm) | Tensile strength(Mpa) | Nominal cross-sectional area(mm2) | Minimum Elongation at max load -1% | Elongation(Min.)% | Relaxation Value 1000h | ||||
| Nominal(g/m) | Permissible variation(g/m) | Low relaxation | Normal relaxation | |||||||
| 70% | 80% | 70% | 80% | |||||||
| 7 wire ordinary | 9.5 | 1850 | 55 | 432 | 423.4-449.3 | 3.5 | 2.5 | 3.5 | 8 | 12 |
| 12.7 | 1870 | 98.6 | 774 | 758.5-805 | ||||||
| 15.2 | 1830 | 143 | 1122 | 1099.6-1166.9 | ||||||