What is the clearance between roof components and the top surface of the corner fitting?

The clearance between the roof components and the top surface of the corner fitting is specified as 6mm. This measurement is important because it ensures sufficient space to accommodate any potential movement or deflection of the roof components, especially under load or in response to environmental conditions. Maintaining an adequate clearance helps to prevent damage to both the roof and the corner fittings, promoting structural integrity and longevity of the dry van. This standard is part of the guidelines set forth for the proper construction and maintenance of dry vans, contributing to the overall safety and performance of these containers in transit.