How should outward deformation of a side panel be measured?

To accurately measure the outward deformation of a side panel, it's essential to use a reference point that ensures consistency and reliability in measurement. Using the interior recessed corrugation as the point of measurement is beneficial because it provides a stable and defined surface that is less likely to be affected by external factors, such as paint, surface corrosion, or other irregularities.

The interior recessed corrugation is typically designed to provide structural support; thus, it remains more uniform than other surfaces that may have been exposed to wear and tear or physical damage. Measuring from this specific area allows for a clearer assessment of deformation in the context of how the side panel is meant to function, making it easier to identify any significant deviations from normal performance criteria.

Other reference points, like the exterior recessed corrugation or the interior lower face of the top side rail, may not provide the same level of accuracy due to potential variances caused by material wear or manufacturing inconsistencies. Measuring from an undamaged area can be subjective and might not align with the deformation assessment standard practices, making the interior recessed corrugation the preferred choice for precise measurement.