IfcDoor

Definition from ISO 6707-1:1989: Construction for closing an opening, intended primarily for access with hinged, pivoted or sliding operation.

Definition from IAI: The door is a building element that is predominately used to provide controlled access for people and goods. It includes constructions with hinged, pivoted, sliding, and additionally revolving and folding operations. A door consists of a lining and one or several panels, properties concerning the lining and panel are defined by the IfcDoorLiningProperties and the IfcDoorPanelProperties.

The door entity, IfcDoor, defines a particular occurrence of a door inserted in the spatial context of a project. A door can:

- either be inserted as a filler in an opening, then the IfcDoor has an inverse attribute FillsVoids provided,
- or be a "free standing" door, then the IfcDoor has no inverse attribute FillsVoids provided.

The actual parameter of the door and/or its shape are defined by the IfcDoor as the occurrence definition (or project instance), or by the IfcDoorStyle as the specific definition (or project type). Parameters are given:

- at the IfcDoor for occurrence specific parameters. The IfcDoor specifies:

- the door width and height
- the door opening direction (by the y-axis of the ObjectPlacement)

- at the IfcDoorStyle, to which the IfcDoor is related by the inverse relationship IsDefinedBy pointing to IfcRelDefinesByType, for style parameters common to all occurrences of the same style.

- the operation type (single swing, double swing, revolving, etc.)
- the door hinge side (by using two different styles for right and left opening doors)
- the construction type
- the particular attributes for the lining by the IfcDoorLiningProperties
- the particular attributes for the panels by the IfcDoorPanelProperties

The IfcDoor is normally inserted into an IfcOpeningElement (but does not need to - see above) using the IfcRelFillsElement relationship. It is also directly linked to the spatial structure of the project (and here normally to the IfcBuildingStorey, or to the IfcSpace) using the IfcRelContainedInSpatialStructure relationship.

> HISTORY New entity in IFC Release 1.0.

Property Set Use Definition:

The property sets relating to the IfcDoor are defined by the IfcPropertySet and attached by the IfcRelDefinesByProperties relationship. It is accessible by the inverse IsDefinedBy relationship. The following property set definitions specific to the IfcDoor are part of this IFC release:

- Pset_DoorCommon: common property set for all door occurrences
- Pset_DoorWindowGlazingType: specific property set for the glazing properties of the door glazing, if available
- Pset_DoorWindowShadingType: specific property set for the shading properties of the door glazing, if available

Geometry Use Definitions:

The geometric representation of IfcDoor is given by the IfcProductDefinitionShape, allowing multiple geometric representations. The IfcDoor, in case of an occurrence object, gets its parameter and shape from the IfcDoorStyle. If an IfcRepresentationMap (a block definition) is defined for the IfcDoorStyle, then the IfcDoor inserts it through the IfcMappedItem.

Local Placement

The local placement for IfcDoor is defined in its supertype IfcProduct. It is defined by the IfcLocalPlacement, which defines the local coordinate system that is referenced by all geometric representations.

1. The PlacementRelTo relationship of IfcLocalPlacement shall point to the local placement of the same element (if given), in which the IfcDoor is used as a filling (normally an IfcOpeningElement), as provided by the IfcRelFillsElement relationship.
2. If the IfcDoor is not inserted into an IfcOpeningElement, then the PlacementRelTo relationship of IfcLocalPlacement shall point (if given) to the local placement of the same IfcSpatialStructureElement that is used in the ContainedInStructure inverse attribute or to a referenced spatial structure element at a higher level.
3. If the relative placement is not used, the absolute placement is defined within the world coordinate system.

Geometric Representation

The geometric representation of IfcDoor is defined using the following (potentially multiple) IfcShapeRepresentation's for its IfcProductDefinitionShape:

- Profile: A 'GeometricCurveSet' consisting of a single closed curve defining the outer boundary of the door (lining). The door parametric representation uses this profile in order to apply the door lining and panel parameter. If not provided, the profile of the IfcOpeningElement is taken.
- FootPrint: A 'GeometricCurveSet', or 'Annotation2D' representation defining the 2D shape of the door
- Body: A 'SweptSolid', 'SurfaceModel', or 'Brep' representation defining the 3D shape of the door.

In addition the parametric representation of a (limited) door shape is available by applying the parameters from IfcDoorStyle referencing IfcDoorLiningProperties and IfcDoorPanelProperties. The purpose of the parameter is described at those entities and below (door opening operation by door style).

Profile - 'GeometricCurveSet' representation

The door profile is represented by a three-dimensional closed curve within a particular shape representation. The profile is used to apply the parameter of the parametric door representation. The following attribute values for the IfcShapeRepresentation holding this geometric representation shall be used:

- RepresentationIdentifier : 'Profile'
- RepresentationType : 'GeometricCurveSet', only a single closed curve shall be contained in the set of IfcShapeRepresentation.Items.

A 'Profile' representation has to be provided if:

- a parametric representation shall be applied to the door AND

- the door is 'free standing', or
- the opening into which the door is inserted is not extruded horizontally (i.e. where the opening profile does not match the door profile)

FootPrint - 'GeometricCurveSet' or 'Annotation2D' representation

The door foot print is represented by a set of two-dimensional curves (or in case of 'Annotation2D' additional hatching and text) within a particular shape representation. The foot print is used for the planview representation of the door. The following attribute values for the IfcShapeRepresentation holding this geometric representation shall be used:

- RepresentationIdentifier : 'FootPrint'
- RepresentationType : 'GeometricCurveSet', or 'Annotation2D'

Body - 'SweptSolid', 'SurfaceModel', or 'Brep' representation

The door body is either represented parameterically (see parametric representation) or by explicit 3D shape. The 3D shape is given by using extrusion geometry, or surface models, or Brep models within a particular shape representation. The body is used for the model view representation of the door. The following attribute values for the IfcShapeRepresentation holding this geometric representation shall be used:

- RepresentationIdentifier : 'Body'
- RepresentationType : 'SweptSolid', 'SurfaceModel', or 'Brep'

MappedRepresentation

The 'FootPrint' and 'Body' geometric representation of IfcDoor can be shared among several identical doors using the 'MappedRepresentation'. The following attribute values for the IfcShapeRepresentation holding this geometric representation shall be used:

- RepresentationIdentifier : 'FootPrint', 'Body'
- RepresentationType : 'MappedRepresentation'

The same constraints, as given for the 'FootPrint', 'Body' representation identifiers, shall apply to the MappedRepresentation of the IfcRepresentationMap.

Door opening operation by door style

The parameters that defines the shape of the IfcDoor, are given at the IfcDoorStyle and the property sets, which are included in the IfcDoorStyle. The IfcDoor only defines the local placement which determines the opening direction of the door. The overall size of the IfcDoor to be used to apply the lining or panel parameter provided by the IfcDoorStyle is determined by the IfcShapeRepresentation with the RepresentationIdentifier = 'Profile'. Only in case of an IfcDoor inserted into an IfcOpeningElement using the IfcRelFillsElement relationship, having a horizontal extrusion (along the y-axis of the IfcDoor), the overall size is determined by the extrusion profile of the IfcOpeningElement.

> Note The OverallWidth and OverallHeight parameters are for informational purpose only.

| The door panel (for swinging doors) opens always into the direction of the positive Y axis of the local placement. The determination of whether the door opens to the left or to the right is done at the level of the IfcDoorStyle. Here it is a left side opening door given by IfcDoorStyle.OperationType = SingleSwingLeft
| If the door should open to the other side, then the local placement has to be changed. It is still a left side opening door, given by IfcDoorStyle.OperationType = SingleSwingLeft
| If the door panel (for swinging doors) opens to the right, a separate door style needs to be used (here IfcDoorStyle.OperationType = SingleSwingRight) and it always opens into the direction of the positive Y axis of the local placement.
| If the door panel (for swinging doors) opens to the right, and into the opposite directions, the local placement of the door need to change. The door style is given by IfcDoorStyle.OperationType = SingleSwingRight.

EXPRESS specification:

ENTITY IfcDoor
SUBTYPE OF ( | IfcBuildingElement);
OverallHeight | : | OPTIONAL IfcPositiveLengthMeasure;
OverallWidth | : | OPTIONAL IfcPositiveLengthMeasure;
END_ENTITY;

Attribute definitions:

OverallHeight | : | Overall measure of the height, it reflects the Z Dimension of a bounding box, enclosing the body of the door opening. If omitted, the OverallHeight should be taken from the geometric representation of the IfcOpening in which the door is inserted. NOTE The body of the door might be taller then the door opening (e.g. in cases where the door lining includes a casing). In these cases the OverallHeight shall still be given as the door opening height, and not as the total height of the door lining.
OverallWidth | : | Overall measure of the width, it reflects the X Dimension of a bounding box, enclosing the body of the door opening. If omitted, the OverallWidth should be taken from the geometric representation of the IfcOpening in which the door is inserted. NOTE The body of the door might be wider then the door opening (e.g. in cases where the door lining includes a casing). In these cases the OverallWidth shall still be given as the door opening width, and not as the total width of the door lining.

Inheritance graph

ENTITY IfcDoor;
ENTITY IfcRoot;
GlobalId | : | IfcGloballyUniqueId;
OwnerHistory | : | IfcOwnerHistory;
Name | : | OPTIONAL IfcLabel;
Description | : | OPTIONAL IfcText;
ENTITY IfcObjectDefinition;
INVERSE
HasAssignments | : | SET OF IfcRelAssigns FOR RelatedObjects;
IsDecomposedBy | : | SET OF IfcRelDecomposes FOR RelatingObject;
Decomposes | : | SET [0:1] OF IfcRelDecomposes FOR RelatedObjects;
HasAssociations | : | SET OF IfcRelAssociates FOR RelatedObjects;
ENTITY IfcObject;
ObjectType | : | OPTIONAL IfcLabel;
INVERSE
IsDefinedBy | : | SET OF IfcRelDefines FOR RelatedObjects;
ENTITY IfcProduct;
ObjectPlacement | : | OPTIONAL IfcObjectPlacement;
Representation | : | OPTIONAL IfcProductRepresentation;
INVERSE
ReferencedBy | : | SET OF IfcRelAssignsToProduct FOR RelatingProduct;
ENTITY IfcElement;
Tag | : | OPTIONAL IfcIdentifier;
INVERSE
HasStructuralMember | : | SET OF IfcRelConnectsStructuralElement FOR RelatingElement;
FillsVoids | : | SET [0:1] OF IfcRelFillsElement FOR RelatedBuildingElement;
ConnectedTo | : | SET OF IfcRelConnectsElements FOR RelatingElement;
HasCoverings | : | SET OF IfcRelCoversBldgElements FOR RelatingBuildingElement;
HasProjections | : | SET OF IfcRelProjectsElement FOR RelatingElement;
ReferencedInStructures | : | SET OF IfcRelReferencedInSpatialStructure FOR RelatedElements;
HasPorts | : | SET OF IfcRelConnectsPortToElement FOR RelatedElement;
HasOpenings | : | SET OF IfcRelVoidsElement FOR RelatingBuildingElement;
IsConnectionRealization | : | SET OF IfcRelConnectsWithRealizingElements FOR RealizingElements;
ProvidesBoundaries | : | SET OF IfcRelSpaceBoundary FOR RelatedBuildingElement;
ConnectedFrom | : | SET OF IfcRelConnectsElements FOR RelatedElement;
ContainedInStructure | : | SET [0:1] OF IfcRelContainedInSpatialStructure FOR RelatedElements;
ENTITY IfcBuildingElement;
ENTITY IfcDoor;
OverallHeight | : | OPTIONAL IfcPositiveLengthMeasure;
OverallWidth | : | OPTIONAL IfcPositiveLengthMeasure;
END_ENTITY;