Share Email Facebook Twitter LinkedIn To Remove a Stair Interference Condition From a Slab Use this procedure to remove a stair interference from a slab. Select the slab from which to remove the interference, and click Slab tabModify panelInterference Condition drop-downRemove. Select the stair, and press Enter. Related Concepts About Stair Interference Conditions Related Tasks To Create an Interference Condition in a WallTo Remove a Stair Interference Condition From a WallTo Create an Interference Condition in a SlabTo Create an Interference Condition in a SpaceTo Remove a Stair Interference Condition From a SpaceTo Create an Interference Condition in a Curtain WallTo Remove a Stair Interference Condition From a Curtain WallTo Create an Interference Condition in a Door/Window AssemblyTo Remove a Stair Interference Condition From a Door/Window AssemblyTo Change the Interference Size of a Stair