What is the minimum clearance required between the roof and the top surface of corner fittings?

The minimum clearance required between the roof and the top surface of corner fittings is established to ensure structural integrity and safety during the operation and transport of the dry van. A clearance of 6 mm allows for adequate space to prevent damage that could be caused by movement or vibration during transit. This dimension is crucial in maintaining the performance of the container under various conditions and minimizing the risk of wear or contact that could compromise its structural integrity.

When determining the appropriate clearance, considerations include the overall design of the container, potential load variances, and the need for maintenance or inspection. A smaller clearance may not accommodate these factors adequately, leading to potential issues in functionality or damage to both the container and its contents. Therefore, setting the clearance at 6 mm strikes a balance between efficiency and safety standards as outlined in industry guidelines.