The Actual Tread Depth for one or more Stairs violates the Minimum Depth set in the type.

public static FailureDefinitionId TreadDepthBelowMin { get; }

Public Shared ReadOnly Property TreadDepthBelowMin As FailureDefinitionId
	Get

public:
static property FailureDefinitionId^ TreadDepthBelowMin {
	FailureDefinitionId^ get ();
}