In Bolted moment connection (134), the gapany space between two objects

The term gap is used in its general sense in Tekla Structures.

between the stiffenercomponent object that represents a structure that strengthens a steel beam or column

Stiffeners are usually plates.

Stiffeners are used to prevent web buckling at supports or concentrated loads.

and the main part(1) part that exists in a building object and that determines the position number for the assembly or cast unit and the direction of assembly or cast unit drawings

(1) Main part can be an assembly main part or a cast unit main part.

(2) input part that the user selects first when creating a component

(2) Connections and details always have a component main part.

web is now correctly created when connecting to the main part web.