IfcRampTypeEnum

Semantic definitions at the type

Type definition

This enumeration defines the basic configuration of the ramp type in terms of the number and shape of ramp flights, as shown in Figure 181. The type also distinguished turns by landings. In addition the subdivision of the straight and changing direction ramps is included. The ramp configurations are given for ramps without and with one and two landings.

Ramps which are subdivided into more than two landings, or ramps with non-regular shapes are to be defined with type being USERDEFINED or NOTDEFINED.

HISTORY New enumeration in IFC2.0.

Enumerator	Description	Figure
StraightRunRamp	A ramp - which is a sloping floor, walk, or roadway - connecting two levels. The straight ramp consists of one straight flight without turns or winders.
TwoStraightRunRamp	A straight ramp consisting of two straight flights without turns but with one landing.
QuarterTurnRamp	A ramp making a 90° turn, consisting of two straight flights connected by a quarterspace landing. The direction of the turn is determined by the walking line.
TwoQuarterTurnRamp	A ramp making a 180° turn, consisting of three straight flights connected by two quarterspace landings. The direction of the turn is determined by the walking line.
HalfTurnRamp	A ramp making a 180° turn, consisting of two straight flights connected by a halfspace landing. The orientation of the turn is determined by the walking line.
SpiralRamp	A ramp constructed around a circular or elliptical well without newels and landings.
UserDefined	Free form ramp (user defined operation type)
NotDefined

Figure 181 — Ramp types

Enumeration definition

Constant	Description
STRAIGHT_RUN_RAMP	A ramp - which is a sloping floor, walk, or roadway - connecting two levels. The straight ramp consists of one straight flight without turns or winders.
TWO_STRAIGHT_RUN_RAMP	A straight ramp consisting of two straight flights without turns but with one landing.
QUARTER_TURN_RAMP	A ramp making a 90° turn, consisting of two straight flights connected by a quarterspace landing. The direction of the turn is determined by the walking line.
TWO_QUARTER_TURN_RAMP	A ramp making a 180° turn, consisting of three straight flights connected by two quarterspace landings. The direction of the turn is determined by the walking line.
HALF_TURN_RAMP	A ramp making a 180° turn, consisting of two straight flights connected by a halfspace landing. The orientation of the turn is determined by the walking line.
SPIRAL_RAMP	A ramp constructed around a circular or elliptical well without newels and landings.
USERDEFINED	Free form ramp (user defined operation type).
NOTDEFINED

Formal representations

XSD Specification

 <xs:simpleType name="IfcRampTypeEnum">

  <xs:restriction base="xs:string">

   <xs:enumeration value="straight_run_ramp"/>

   <xs:enumeration value="two_straight_run_ramp"/>

   <xs:enumeration value="quarter_turn_ramp"/>

   <xs:enumeration value="two_quarter_turn_ramp"/>

   <xs:enumeration value="half_turn_ramp"/>

   <xs:enumeration value="spiral_ramp"/>

   <xs:enumeration value="userdefined"/>

   <xs:enumeration value="notdefined"/>

  </xs:restriction>

 </xs:simpleType>

EXPRESS Specification


TYPE IfcRampTypeEnum = ENUMERATION OF (

 STRAIGHT_RUN_RAMP, 
 TWO_STRAIGHT_RUN_RAMP, 
 QUARTER_TURN_RAMP, 
 TWO_QUARTER_TURN_RAMP, 
 HALF_TURN_RAMP, 
 SPIRAL_RAMP, 
 USERDEFINED, 
 NOTDEFINED);
END_TYPE;


 EXPRESS-G diagram

	Ramp Type Enum
	Énumération des types de rampe