How should the inward deformation of a door be measured?

The inward deformation of a door should be measured from the inside of the door's undamaged area. This method focuses on the part of the door that has not been affected by any damage, allowing for a more accurate assessment of deformation. Measuring from this undamaged area provides a clear baseline of the door's original shape and structure, ensuring that any inward deformation can be evaluated effectively.

Measuring from the edge of the door or the outside may introduce factors that do not accurately reflect the door's internal condition, possibly skewing the results. Similarly, taking measurements from the door handle may not capture the deformational characteristics accurately, as handles can be positioned variably and might not be relevant for assessing the overall inward deformation. Using the undamaged area ensures that the measurement is both precise and meaningful for evaluating the door's integrity.