What is the standard thickness for flat bar top rails?

The standard thickness for flat bar top rails in the context of dry vans is indeed 12mm. This thickness is commonly used due to its balance between strength and weight, providing structural integrity while remaining manageable for manufacturing and handling. A 12mm thickness offers adequate strength to support the load and maintain the structural safety of the container. It also aligns with industry standards that prioritize durability and performance, ensuring that the top rails can withstand the rigors of transportation and loading without compromising the overall integrity of the dry van. Choosing this thickness helps in facilitating effective stacking and stabilizing loads during transit, which is crucial for safety and efficiency.