When transporting loose materials, what must be securely covered to prevent material escape?

When transporting loose materials, it is essential to securely cover them with a canvas or tarp to prevent any escape of material during transit. Using a canvas or tarp provides a durable and flexible barrier that can conform to the load, effectively containing materials like dirt, gravel, or other bulk items.

Additionally, canvas and tarps are typically designed for heavy-duty use, making them suitable for outdoor conditions, including wind and rain. They can be easily tied down to ensure that they remain in place, reducing the likelihood of wear and tear or material loss.

While other methods like mesh netting or plastic sheeting may offer some degree of coverage, they can be less effective in preventing the escape of loose materials, especially in windy conditions or over longer distances. Wooden planks, on the other hand, are not as flexible or easy to secure, making them less practical for this purpose. Therefore, a canvas or tarp is the best choice for effectively containing loose materials during transport.