Shagang has eight imported production lines of steel strand wire, their specification can cover from 1×7－Φ9.50mm to 1×7－Φ21.6mm, with annual output capacity of 300,000 tons. “Pre-stressed concrete strand wire” in short term of “pre-stressed strand wire” has the feature of high strength and low slackness. Embedded the pre-stressed strand wire into the concrete has not only enforced the loading ability of the structure, but also reduced the fracture surface of the concrete structures, as well as saved 30-40% of steel materials and 40% of concrete; which has improved the service life of the pre-stressed concrete structure so as to improve the safety and reliability of buildings. Meanwhile, it can greatly increase the beam span and reduce the support columns, in order to improve the utilization rate of the storeys.
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