Use sketching tools to define the perimeter of a beam system.
 Video: Place Beam Systems and Structural Floors
 Video: Place Beam Systems and Structural Floors 
 Structure panel
Structure panel 
 
   (Beam System).
 (Beam System). 
 Beam System panel
Beam System panel 
 
   (Sketch Beam System).
 (Sketch Beam System). 
 Line to sketch, or click Draw panel
Line to sketch, or click Draw panel Pick Lines to select existing lines.
 Pick Lines to select existing lines. 
  You can also click Draw panel Line to sketch, or click Draw panel
Line to sketch, or click Draw panel Pick Supports to select the border of the beam system.
 Pick Supports to select the border of the beam system. 
  

Sketched beam system boundary with lines locked to supports
 Mode panel
Mode panel 
 
   (Finish Edit Mode).
(Finish Edit Mode). 
  
Floor plan and 3D view of completed structural beam system