Check Use Line for Framing in CAD Defaults to show all framing members as single lines rather than as closed polylines in floor plan view.
Framing
73 - Framing Basics
324 - General Framing Strategy
336 - Adding Blocking and Bracing
5204 - Using the Build Framing for Selected Objects Edit Tool
335 - Using a Framing Reference
337 - Mitering a Framing Joint with the Miter and Join edit tools
338 - Displaying Framing as CAD Lines
500 - Automatic Deck Framing
