According to IS 1343-1980, which of the following types of steel is not suitable for prestressed concrete?
1
Cold-drawn high-tensile steel wire
2
Uncoated stress-relieved low relaxation seven-ply strand
3
Mild steel
4
High-tensile alloy steel bar
According to IS 1343-1980, which of the following types of steel is not suitable for prestressed concrete?