Where should the reference line be placed to determine repairworthiness of a crossmember flange that is bent upwards?

To determine the repairworthiness of a crossmember flange that is bent upwards, the reference line should be positioned to accurately assess the deformation. In this context, the most effective placement for the reference line is along the outermost flange surface, as this allows you to gauge the extent of the bend relative to an undamaged state.

Positioning the reference line on the outermost flange surface along the full crossmember length provides a clear benchmark from which to measure any deformation. This placement also accounts for any variations along the length of the beam, ensuring that the entire crossmember is evaluated under the same criteria for repairworthiness. This is essential in structural assessments, as it takes into consideration the maximum deflection points and how they might affect the overall integrity of the crossmember.

In contrast, placing the reference line in other suggested locations, such as the inside lower formed edge or spaced out from the web, would not provide the same level of insight into the extent of the upward bend. Not measuring at all dismisses the importance of evaluating and quantifying any damage, which is critical for ensuring safety and performance in container structures.