- Standard: ASTM A 416/A416M-17
- Diameter range, mm: 7,9-15,7
- Tensile strength, MPa: 1725, 1860
Instruction for unwinding reinforcing strands (ropes)
Coils of reinforcing strands (ropes) are marked with a paper self-adhesive label with the image “arrow” to indicate the direction of unwinding of the strand in the following order (Figure 1):
– On the reinforcing strands (ropes) of the right twist, the arrow is directed inside the coil;
– On reinforcing strands (ropes) of the left twist, the arrow points outward of the coil.
Figure 1 Direction of unwinding of a strand (rope)
To avoid tangling of strands (ropes) during their processing, it is necessary to unwind a reinforcing strand (rope) depending on the direction of stranding (rope) in the direction indicated by the arrow (Figure 1).
The dimensions and properties of the strands according to ASTM A 416/A416M-17.
| Nominal values | Calculated values | |||||
Strand diameter d, inches (mm)
| Tensile strength kilo pounds per square inch (N / mm2)
| Cross-section area Sn,,sq. inch (mm 2) | Mass of one meter length М, Ib./1000 pound (g/m) | Minimum tensile strength, lbf (kN)
| Minimum tensile load 1.0% lbf (kN)
| The minimum value of the total elongation at maximum load, Agt, with Lo ≥ 24 inches,% |
| 7-wire – Grade 250 (1725) – tolerance of ±0,016 inches (±0,40 mm) of thee nominal diameter. | ||||||
| 0,313 (7,9) | 250 (1725) | 0,058(37) | 197(294) | 14500(64,5) | 13050(58,1) | 3,5 |
| 0,375 (9,5) | 250 (1725) | 0,080(52) | 272(405) | 20000(89,0) | 18000(80,1) | 3,5 |
| 0,438 (11,1) | 250 (1725) | 0,108(69,7) | 367(548) | 27000(120) | 24300(108,1) | 3,5 |
| 0,500 (12,7) | 250(1725) | 0,144(92,9) | 490(730) | 36000(160) | 32400(144,1) | 3,5 |
| 0,600 (15,2) | 250 (1725) | 0,216(139) | 737(1090) | 54000(240) | 48600(216,2) | 3,5 |
| 7-wire – Grade 270 (1860– tolerance of +0,026, -0,006 inches (+0,65, -0,15 mm) of thee nominal diameter. | ||||||
| 0,375 (9,53) | 270(1860) | 0,085(55) | 290(430) | 23000(102) | 20700(92,1) | 3,5 |
| 0,438(11,1) | 270(1860) | 0,115(74,2) | 390(580) | 31000(138) | 27900(124,1) | 3,5 |
| 0,500(12,7) | 270(1860) | 0,153(98,7) | 520(780) | 41300(184) | 37170(165,3) | 3,5 |
| 0,600(15,24) | 270(1860) | 0,217(140) | 740(1100) | 58600(261) | 52740(234,6) | 3,5 |
| 0,620(15,7) | 270(1860) | 0,231(150) | 780(1200) | 62800(279) | 56520(251,4) | 3,5 |
| Note a. The elastic modulus (E) can be taken as 194-199 GPa (kN / mm2) Note b. The nominal linear density (mass of one meter of length) of the product is calculated from the cross-sectional area and density of 7.81 kg / dm3. Note c. The minimum tensile strength value of 1.0% is calculated for all diameters as 90% of the tensile strength. Relaxation after 1000 hours is not more than 2.5% at an initial load of 70% of the minimum tensile strength. Special properties in accordance with the additional requirements of ASTM A 416/A416M-17. | ||||||
The strands are delivered in coils: - inner diameter: 750 mm, 800 mm, 900 mm; - outer diameter: max. 1600 mm; - width: 750 mm, 630 mm; The maximum weight of the coils is 4 tons. 7-wire strands are delivered with in-line styling.
- Type of winding:Strands
- Dimensions, mm, d*D*h:750 mm, 630 mm;
- Weight kg:4 t
- Diameter range, mm:750 mm - 1600 mm