Purpose: Used to specify top flange thickness or set its limits for design generation.
--> Given in girder design input
Top flange thickness design settings (Default limits: 0.5-4.0 inches or 12-100 mm). Top flange thickness can be specified (USE TFT), or limits can be adjusted (UPPER LIMIT TFT, LOWER LIMIT TFT) using a single value, or a list of values to vary by web section.