Natural language names
Stair Flight Type Enum
Énumération des types de volées d'escalier
Semantic definitions at the type
Type definition

This enumeration defines the different types of stair flights that can further specify an IfcStairFlight or IfcStairFlightType.

HISTORY  New enumeration in IFC2x2.
Enumeration definition
STRAIGHTA stair flight with a straight walking line.
WINDERA stair flight with a walking line including straight and curved sections.
SPIRALA stair flight with a circular or elliptic walking line.
CURVEDA stair flight with a curved walking line.
FREEFORMA stair flight with a free form walking line (and outer boundaries).
USERDEFINEDUser-defined stair flight.
NOTDEFINEDUndefined stair flight.
Formal representations
XML Specification
 <xs:simpleType name="IfcStairFlightTypeEnum">
  <xs:restriction base="xs:string">
   <xs:enumeration value="straight"/>
   <xs:enumeration value="winder"/>
   <xs:enumeration value="spiral"/>
   <xs:enumeration value="curved"/>
   <xs:enumeration value="freeform"/>
   <xs:enumeration value="userdefined"/>
   <xs:enumeration value="notdefined"/>
EXPRESS Specification
TYPE IfcStairFlightTypeEnum = ENUMERATION OF (

Link to EXPRESS-G diagram EXPRESS-G diagram

References  References: IfcStairFlight IfcStairFlightType

Link to this page  Link to this page