Spiral Prestressed Concrete Strand

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Spiral Prestressed Concrete Strand

The spiralpre-stressed strand is made using spiral technology that represents the best ofour research and development program. It features a high mechanical propertyand good bond strength to concrete. It is widely used in hollow floors, railwaysleepers, PC cables and many other pre-stressedconcrete structures.

Key Parameterand Reference Standards

Appearance	Nominal dia.(mm)	Tensile strength (MPa)	Relaxation(1000h)	Standards
Seven wires in left- or right-twist with spiral ribs	8.0, 9.3, 9.53, 11.1 12.5, 12.7, 12.9 15.2, 15.24, 15.7	1770,1860	Low relaxation ≤2.5%	ASTM A416 BS5896 En1038-3 AS/NZS4672 GB/T5224 KS7002 ISO6934/4 SS213620 JISG36094 NEN3868
Two wires in left- or right-twist with spiral ribs	7.6, 8.6, 9.1	1725,1860	Low relaxation ≤2.5%	ABNT NBR7483
Two wires in left- or right-twist with spiral ribs	4.8, 5.2, 5.8, 6.2 6.5, 7.5, 8.6	1725,1860	Low relaxation ≤2.5%	ASTM A910

The spiral pre-stressed strand is available in 2-wire, 3-wire, or 7-wireleft-twist or right-twist forms. The 7-wire spiral PC strand can be supplied ina diameter of 8.0mm, 9.3mm, 9.53mm, 11.1mm,12.5mm, 12.7mm, 15.2mm, 15.24mm, or15.7mm and a tensile strengthof 1770MPa or 1860MPa. The 2-wire spiral PC strand is available in a diameterof 7.6mm, 8.6mm or 9.1mm and in a tensile strength of 1725MPa or 1860MPa.The 3-wire spiral PC stand comes in a diameter of 4.8mm, 5.2mm,5.8mm, 6.2mm, 6.5mm, 7.5mm,or 8.6mm and atensile strength of 1725MPa or 1860MPa.

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