What should be the condition of door headers and sills for them to be considered functional?

For door headers and sills to be considered functional, there must be no interference with door closure. This means that the components should allow the doors to open and close smoothly without hindrance, ensuring that the container can be securely closed and sealed when not in use. Proper functionality is critical for the overall security and integrity of the container, which is paramount for the transport of goods.

While factors such as rust-free conditions or aesthetic appearances might contribute to the overall condition of a container, they do not directly affect the primary function of the door mechanisms. Additionally, painting is also not a requirement for functionality; it may be done for protective or aesthetic reasons but does not determine whether the doors can operate as intended. Therefore, ensuring that doors can close properly without obstruction is the most essential condition for their functional status.