Curtain wall grid lines are outside wall. If you are trying to shorten the wall, please remove grid lines, including mullions on top of them.

Namespace: Autodesk.Revit.DB
Assembly: RevitAPI (in RevitAPI.dll) Version: 24.0.0.0 (24.0.0.0)

Syntax

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

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

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

See Also