RR-F-191/3C, Grade B and has been evaluated and approved by eighteen Highway
departments, including Wyoming. Minimum yied strength is 50,000 psi conforming
to ASTM A569, and coated with a minimum of 0.9 ounces of zinc per square foot.
The zinc coating is then overcoated with a chromate conversion, which is an acrylic
coating that provides superior resistance to white and red rusting. |