You can add braces in either a plan view or in a framing elevation view.
To add a brace in a framing elevation view
Open a framing elevation view.
If necessary, load additional braces from the Structural/Framing folder under the Library folder of the Revit program group. For more information, see Loading Structural Braces.
To edit the properties of the brace before adding the brace to your model, click on the Properties palette.
In the drawing area, highlight the snapping point where you want to begin the brace, such as on a structural column. Click to place a start point.
Snap to begin brace
Move the pointer in a diagonal direction to sketch the brace and place the cursor near another structural element to snap it. Click to place the endpoint.
Sample braces in a framing elevation view
To add a brace in a plan view
Open a plan view.
Click Structure tabStructure panel Brace.
On the Options Bar, specify both the Start Level and offset distance and the End Level and offset distance.
Click the start point and the endpoint of the brace in the project.