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pc strand we can supply Spiral(helical) ribs prestressed concrete wire and strand as follows Size/mm Tolerance/mm Area/mm2 Theoreticalweight-g/m WireCross-sectionalSize Rib Pieces Lay Length (Lg)/ mm Basic-round Dia(D1)/ mm Outione Dia(D)/mm Rib Width(jk)/ mm Rib Height(jg)/ mm 4.00 ±0.04 12.57 98.6 3.85±0.05 4.25±0.05 0.90 1.30 0.15 0.25 4 24-30 4.80 ±0.05 18.10 142 4.60±0.05 5.10±0.05 1.30 1.70 0.20 0.30 28-36 5.00 19.63 154 4.08±0.05 5.30±0.05 1.30 1.70 0.20 0.30 28-36 5.25 21.65 170 5.05±0.05 5.55±0.05 1.40 1.80 0.20 0.30 28-38 6.00 28.27 222 5.80±0.05 6.30±0.05 1.60 2.00 0.30 0.40 30-38 6.25 30.68 241 6.00±0.05 6.70±0.05 1.60 2.00 0.30 0.40 30-40 7.00 38.48 302 6.73±0.05 7.46±0.10 1.80 2.20 0.30 0.40 35-45 7.50 44.18 347 7.25±0.05 7.95±0.05 1.90 2.30 0.30 0.40 40-50 8.00 ±0.06 50.26 394 7.75±0.05 8.45±0.10 2.00 2.40 0.30 0.40 40-50 9.00 63.62 499 8.75±0.05 9.45±0.05 2.10 2.70 0.30 0.40 42-52 9.50 70.88 556 9.25±0.10 9.25±0.05 2.20 2.80 0.30 0.40 44-55 10.00 78.54 616 9.75±0.05 9.75±0.05 2.50 3.00 0.30 0.40 45-58 12.00 113.1 888 11.60±0.05 12.20±0.10 2.80 3.20 0.30 0.40 50-65 Size/mm Nominal Tensile Strength/Mpa Yield Strength/Mpa Elongation Lo=200mm/% 180oBending Times Relaxation Times Bending Radius/mm Condition % 4.00 1470 1570 1670 1770 1860 1290 1380 1470 1560 1640 ≥3.5 ≥3 10 Initialload being70%of nominal breaking strength ≤2.5 4.80 ≥4 15 5.00 5.25 6.00 6.25 20 7.00 7.50 14701570 16701770 12901380 14701560 8.00 9.00 14701570 1670 12901380 1470 25 9.50 10.00 14701570 12901380 12.00 30 Packingincoilswithsteelstripssecuredorsubjecttorequirement.