Structure: 7 wires, typically made of high-strength steel, twisted together in a helical arrangement.
Diameter of Strand, mm[in.]
Tolerance of Dia.
mm
Minimum Breaking Strength of Strand, kN [lbf]
Steel Area of Strand
mm2 [in.2]
Weight of Strand kg/1000m [lb/1000 ft]
Min Load at 1% Extension,
kN [lbf]
Low-Relaxation
Minimum Difference Between Center Wire Diameter and Diameter of Any Outer Wire, mm [in.]
Elongation
(%)
The relaxation at 1000 h, Initial load to 70% of nominal max load (r/%) Low-Relaxation
Grade 1860 [270]
15.24 [0.600]
+0.65
-0.15
260.7 [58 600]
140.0 [0.217]
1102 [740]
234.6 [52 740]
0.1016 [0.004]
3.5
2.5
Material: High-strength steel wires (usually carbon steel with special heat treatment) designed to offer superior tensile strength and flexibility.
Type of Strand: This strand is a bare or uncoated strand, though it can also be galvanized or coated for additional protection against corros…