In Column - 2 beam (14), there were previously issues when you created one plate(1) part that represents a flat structure

(1) In some contexts, for example in analysis, the term plate object may be used to refer to plates.

(2) plate that represents a steel structure

(2) Plate is mainly used as a connection piece or as a floor plate.

and the bolts were placed incorrectly. This has now been fixed.