How much downward deformation from the top face of the bottom side rail is permissible?

The permissible downward deformation from the top face of the bottom side rail is an important factor in ensuring the structural integrity and safety of the dry van. The standard limit set for this deformation is 15mm. This specification is based on industry practices that account for the tolerances and performance requirements necessary to maintain the van's functionality, including its ability to carry loads without compromising safety or causing undue stress on the container structure.

When a dry van experiences load, it is natural for some deformation to occur. However, if this deformation exceeds the specified limit, it can lead to potential issues such as misalignment, difficulty in stacking with other containers, or even structural failure in extreme cases. Therefore, keeping the deformation within the prescribed limit is crucial for ensuring that the container remains safe for use and can effectively fulfill its intended purpose.

In contrast, the other options represent measurements that exceed the acceptable limit. Allowing greater deformation could compromise the container's integrity and performance, which is why they are not considered permissible within industry standards.