Methods for making a vehicular subassembly with a notched flange to reduce strain in bending

摘要: A method of making a vehicular subassembly includes step for providing roof header comprising hollow member having long axis, short and an outer surface that flange. The also stretch bending the such is substantially in tension curved axis direction. further cutting plurality notched elements into flange to reduce strain from step. In some aspects, can be conducted before associated with subsequent bending.