File > Export > Stiffeners saves the selected stiffener data to a Microsoft Excel workbook. All stiffener definition types (by intersection, by offset, by 2D projection, and by table) can be exported. All stiffener data associated with each definition type are supported, including names, attributes, cross-section types, wireframe coordinates, boundaries, and orientations.
The output workbook uses the stiffener import-export format.xls workbook as a template. See Stiffener Import Workbook.