Under NSC Standard 10 (Cargo Securement), if you are hauling a load of steel coils that are placed with their eyes vertical, how must they be secured?

1. Using a single chain threaded through the center of the coil
2. With at least one tiedown through the eye of the coil, plus blocking/bracing or additional tiedowns to prevent forward, backward, and lateral rolling or shifting
3. By stacking them on top of rubber mats without any chains
4. By welding the bottom of the coil to the trailer bed