If a pen table contains a pen map section, the pen maps can be exported to an AutoCAD CTB file by selecting File > Export CTB File in the Modify Pen Table dialog.

When a CTB file is exported, ProStructures writes only the data relevant to the pen map section. Other pen table resymbolization actions, such as end caps, line joints, patterns, and the like, are not exported to the CTB file.

If a CTB file is imported into the pen table and then exported, the extra data that ProStructures does not modify is preserved. This must be done, however, in a single pen table session.

ProStructures does not store any "unrecognized" CTB data in a pen table file. The topic Saving a CTB/STB file to a pen table provides more information on exporting these files to a pen table.

ProStructures cannot export to an STB file.