CADWorx Structure tab: Model panel > Assemblies
Command line: ASSEMSTR
Creates structural assemblies in the 3D model space.
Stair
Displays the Stair palette and allows you to insert stairs. For more information, see Stair.
Handrail
Displays the Handrail palette and allows you to insert handrails. For more information, see Handrail.
Ladder
Displays the Ladder palette and allows you to insert ladders. For more information, see Ladder.