Structural steel connections or individual structural steel fabrication elements are not allowed in Design Options.

Namespace: Autodesk.Revit.DB
Assembly: RevitAPI (in RevitAPI.dll) Version: 19.0.0.0 (19.0.0.405)

Syntax

C#
`public static FailureDefinitionId FabricationCannotBeInDesignOption { get; }`

Visual Basic
`Public Shared ReadOnly Property FabricationCannotBeInDesignOption As FailureDefinitionId Get`

Visual C++
`public: static property FailureDefinitionId^ FabricationCannotBeInDesignOption { FailureDefinitionId^ get (); }`

See Also