1. Standard Specification for Low-Relaxation, Seven-Wire Steel Strand for Prestressed Concrete;ASTM A416,2017
2. Steel for the Prestressing of Concrete - Part 4: Strand;ISO 6934-4,1991
3. Prestressing Steels – Part 3: Strand;FprEN 10138-3,2009
4. Steel Wires and Strands for Prestressed Concrete;JIS G3536,2014
5. Uncoated Stress-Relieved Steel Wires and Strands for Prestressed Concrete;KS D7002,2018