A profile family contains a 2-dimensional shape (usually a closed loop) that you can load into a project and apply to certain building elements. For example, you can sketch the profile loop for a railing and then use that shape on a railing in your project. Loaded profiles display in the Project Browser under Families.
To create a profile family, open a new family, and sketch a profile using lines, dimensions, and reference planes. After you save the profile family, you can load it and apply it to solid geometry in the project.
This procedure describes creating a generic profile shape that is available to multiple building elements in the project. Your specific building and design intentions may differ.
To create a profile

New
Family. The Family Editor opens a plan view that includes 2 reference planes. There are no other views available in which to sketch lines.
Detail panel
(Line), and sketch the profile loop.
Detail panel
(Detail Component) to place a detail component into the profile family.
Visibility panel
(Visibility Settings). For example, if you are creating a mullion profile, select Mullion.
Examples

Sample profile sketch

Sample crane rail profile sketch

Sample metal deck profile sketch