Purpose: Used to specify nominal depth or set its limits for design generation.
--> Given in girder design input
Nominal depth for rolled shapes design settings (Default limits: 12.0-40.0 inches or 300-1000 mm). Nominal depth can be specified (USE ND), or limits can be adjusted (UPPER LIMIT ND, LOWER LIMIT ND) using a single value, or a list of values to vary by web section.