Prestressed Material
7 Wire Compacted Strand ,Seven wire strand which after stranding has been compacted by drawing or rolling before stress relief treatment.
When stranding and compacting are carried out simultaneously, the straight central wire is at least the same diameter as the outer helical wires.
SPECIFICATIONS
7 Wire Compacted Strand ,EN10138
| Steel designation | Nominal a | Specified | |||||||
| Steel name | Steel number | Diameter D mm | Tensile strength Rm MPa | Cross- sectional area b Sn mm2 | Mass per metre M g/m | Permitted deviation on mass per metre, % | Characteristic value of maximum force Fm kN | Maximum value of maximum force Fm, max kN | Characteristic value of 0,1 % proof force Fp0,1 kN |
| Y1700S7G | 1.137 | 18,0 | 1 700 | 223 | 1 742 | ± 2 | 379 | 447 | 334 |
| Y1820S7G | 1.1371 | 15,2 | 1 820 | 165 | 1 289 | ± 2 | 300 | 354 | 264 |
| Y1860S7G | 1.1372 | 12,7 | 1 860 | 112 | 874,7 | ± 2 | 208 | 245 | 183 |
| 15,2 | 165 | 1 289 | 307 | 362 | 270 | ||||
Compact PC Strand , ASTM A779
| Nominal Diameter of Strand | Specified Minimum Breaking Strength of Strand, lbf [kN] | Nominal Steel Area of Strand | Nominal Mass (Weight) of Strands lb/1000 ft [kg/1000 m] | Initial Load, lbf [kN] | Specified Minimum Load at 1 % Extension, lbf [kN] | |||
| in. | [mm] | in. 2 | [mm 2 ] | Normal-Relaxation | Low-Relaxation | |||
| Grade 270 [1860] | ||||||||
| 0.5 | [12.7] | 47 000 [209] | 0.174 | [112] | 600 [890] | 4700 [20.9] | 40 900 [182] | 42 300 [188] |
| Grade 260 [1800] | ||||||||
| 0.6 | [15.2] | 67 440 [300] | 0.256 | [165] | 873 [1295] | 6740 [30.0] | 58 700 [261] | 60 700 [270] |
| Grade 245 [1700] | ||||||||
| 0.7 | [18.0] | 85 430 [380] | 0.346 | [223] | 1176 [1750] | 8540 [38.0] | 74 300 [330] | 76 900 [342] |
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