#### 5.2.4.12 AISC_EM11_Pset_Feature

| Feature: Features modify the shape and appearance of the associated host element. Features in EM11 are further specialized based on its type. Features are Bolt Hole, Slot Hole, Opening, Cope, and Skewed End. A Feature has their own geometry representation and subtract its geometry from the shape of the master element through Voids Element (IfcRelVoidsElement). Features should not and cannot directly manipulate geometry of the host element using Boolean Operation (IfcBooleanResult) or Boundary Representation.

buildingSMART Data Dictionary

PSD-XML

Name | Type | Description
--- | --- | ---
CriticalFace | P_ENUMERATEDVALUE / AISC_EM11_CriticalFace |
| Critical Face | Critical Face indicates where this specific feature is applied to according to the predefined enumeration type AISC_EM11_CriticalFace. Value should use one of enumerated value: Front Top Bottom Behind Left Right
FabricationMethod | P_ENUMERATEDVALUE / AISC_EM11_FabricationMethod |
| Fabrication Method | Fabrication Methods of the applied feature can have multiple values if needed. Possible values are predefined in AISC_EM11_FabricationMethod enumerated type. Punching Sub-PunchingAndReaming Drilling HoleSawing FlamePiercingAndReaming FlameCutting Milling FaceMachining Planing Grinding Sawing FrictionSawing ColdSawing Oxygen-AcetyleneFlameCutting PlasmaCutting LaserCutting Shearing
DesignConstraint | P_SINGLEVALUE / IfcLabel |
| Design Constraint | Describes special treatment, such as rounded rectangle

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