Which type of securing method may not comply with federal regulations for transporting heavy metal coils?

Using chains that are too short may not comply with federal regulations for transporting heavy metal coils because proper securing methods are essential to ensure the loads are adequately restrained during transport. Federal guidelines specify the need for securing devices to be of adequate length and strength to maintain stability and prevent movement of the cargo. When chains are too short, they may not provide sufficient tension or coverage to secure the heavy coils effectively. This can lead to unsafe transport conditions where the cargo might shift, increasing the risk of accidents on the road, thereby violating established safety standards. Thus, it's crucial for transporters to ensure that securing methods fully meet all federal regulations regarding load security.