Prestressed Concrete Screw-Thread Steel Bars (also known as high-strength deformed bars for prestressing) are high-strength, large-diameter straight bars rolled with discontinuous external threads across their entire length . Manufactured from high-grade alloy steel through hot-rolling or heat treatment processes, they deliver exceptional yield and tensile strength, significantly reducing the cross-sectional area and weight of structural members while ensuring safety and reliability . The continuous thread design allows for easy connection using couplers or anchorage nuts at any point, greatly simplifying on-site construction . These bars are widely used in large-scale infrastructure projects, including highway and railway bridges, large-span frame structures,