If the barrier boards exceed 30 inches, what should be used?

When barrier boards exceed 30 inches, the appropriate action is to use additional chains. This is because barriers are meant to prevent cargo from shifting during transport, and when the height of the barrier exceeds a certain threshold, additional support is necessary to ensure stability and safety. Chains provide a secure method of restraint that can accommodate the increased height, preventing cargo from becoming loose or unstable, which could lead to dangerous situations during transportation.

In contrast, load straps, while useful for securing cargo, may not provide the same level of stability for tall barriers as chains do. More boards could add height but would not effectively restrain the cargo without the necessary securement measures. Safety nets are generally employed to contain or catch items that may fall but do not provide direct support to prevent shifting or toppling, which is required with higher barrier boards. Overall, the use of additional chains is critical for maintaining the integrity and safety of the load.