IfcCraneRailAShapeProfileDef

Definition from IAI: The IfcCraneRailAShapeProfileDef defines a section profile that provides the defining parameters of a crane rail to be used by the swept area solid. Its parameters and orientation relative to the position coordinate system are according to the following illustration. The centre of the position coordinate system is in the profiles centre of the gravity bounding box.

The centre of gravity, if given, is located in x direction within the center of the bounding box, and in y-direction along the negative y axis, the offset value is given by the offset parameter CentreOfGravityInY.

> NOTE: This crane rail shape is defined according to DIN 536 (type A), but is used also in other locales.

> HISTORY New entity in Release IFC2x Edition 2.

> IFC2x Edition 3 CHANGE All profile origins are now in the center of the bounding box. The attribute CentreOfGravityInY has been made OPTIONAL. Upward compatibility for file based exchange is guaranteed.

Illustration:

| Position The parameterized profile defines its own position coordinate system. The underlying coordinate system is defined by the swept area solid that uses the profile definition. It is the xy plane of: IfcSweptAreaSolid.Position by using offsets of the position location, the parameterized profile can be positioned centric (using x,y offsets = 0.), or at any position relative to the profile. Explicit coordinate offsets are used to define cardinal points (e.g. upper-left bound). Parameter The parameterized profile is defined by a set of parameter attributes, see attribute definition below. |

Table: Parameters of crane rail A shape

EXPRESS specification:

ENTITY IfcCraneRailAShapeProfileDef
SUBTYPE OF ( | IfcParameterizedProfileDef);
OverallHeight | : | IfcPositiveLengthMeasure;
BaseWidth2 | : | IfcPositiveLengthMeasure;
Radius | : | OPTIONAL IfcPositiveLengthMeasure;
HeadWidth | : | IfcPositiveLengthMeasure;
HeadDepth2 | : | IfcPositiveLengthMeasure;
HeadDepth3 | : | IfcPositiveLengthMeasure;
WebThickness | : | IfcPositiveLengthMeasure;
BaseWidth4 | : | IfcPositiveLengthMeasure;
BaseDepth1 | : | IfcPositiveLengthMeasure;
BaseDepth2 | : | IfcPositiveLengthMeasure;
BaseDepth3 | : | IfcPositiveLengthMeasure;
CentreOfGravityInY | : | OPTIONAL IfcPositiveLengthMeasure;
END_ENTITY;

Attribute definitions:

OverallHeight | : | Total extent of the height, defined parallel to the y axis of the position coordinate system. See illustration above (= h1).
BaseWidth2 | : | Total extent of the width of the base, defined parallel to the x axis of the position coordinate system. See illustration above (= b2).
Radius | : | Edge radius according the above illustration (= r1).
HeadWidth | : | Total extent of the width of the head, defined parallel to the x axis of the position coordinate system. See illustration above (= b1).
HeadDepth2 | : | Head depth of the A shape crane rail, see illustration above (= h2).
HeadDepth3 | : | Head depth of the A shape crane rail, see illustration above (= h3).
WebThickness | : | Thickness of the web of the A shape crane rail. See illustration above (= b3).
BaseWidth4 | : | Width of the base where thickness changes, defined parallel to the x axis of the position coordinate system. See illustration above (= b4).
BaseDepth1 | : | Base depth of the A shape crane rail, see illustration above (= s1).
BaseDepth2 | : | Base depth of the A shape crane rail, see illustration above (= s2).
BaseDepth3 | : | Depth of the base where thickness changes, see illustration above (= s3).
CentreOfGravityInY | : | Location of centre of gravity along the y axis measured from the center of the bounding box. IFC2x Edition 2 Addendum 2 CHANGE The attribute CentreOfGravityInY has been made optional. Upward compatibility for file based exchange is guaranteed.

Inheritance graph

ENTITY IfcCraneRailAShapeProfileDef;
ENTITY IfcProfileDef;
ProfileType | : | IfcProfileTypeEnum;
ProfileName | : | OPTIONAL IfcLabel;
ENTITY IfcParameterizedProfileDef;
Position | : | IfcAxis2Placement2D;
ENTITY IfcCraneRailAShapeProfileDef;
OverallHeight | : | IfcPositiveLengthMeasure;
BaseWidth2 | : | IfcPositiveLengthMeasure;
Radius | : | OPTIONAL IfcPositiveLengthMeasure;
HeadWidth | : | IfcPositiveLengthMeasure;
HeadDepth2 | : | IfcPositiveLengthMeasure;
HeadDepth3 | : | IfcPositiveLengthMeasure;
WebThickness | : | IfcPositiveLengthMeasure;
BaseWidth4 | : | IfcPositiveLengthMeasure;
BaseDepth1 | : | IfcPositiveLengthMeasure;
BaseDepth2 | : | IfcPositiveLengthMeasure;
BaseDepth3 | : | IfcPositiveLengthMeasure;
CentreOfGravityInY | : | OPTIONAL IfcPositiveLengthMeasure;
END_ENTITY;