Definition from IAI: The wall (IfcWall) represents a
vertical construction that bounds or subdivides Spaces. It is the common
concept of a wall that will be later specialized in the various domains.
The quantities relating to the wall are defined by the
IfcElementQuantity and attached by the IfcRelDefinesByProperties.
The following quantities are foreseen, but will be subjected to the local
standard of measurement:
| Name |
Description |
Value
Type |
| WallGroundArea |
Area of the
wall as viewed by a ground floor view, also refered to as the foot print of the
wall. The exact definition and calculation rules depend on the method of
measurement used. |
IfcAreaQuantity |
| WallSideArea |
Area of the
wall as viewed by an elevation view. The exact definition and calculation rules
depend on the method of measurement used. |
IfcAreaQuantity
|
| WallVolume |
Volume of the
wall, after subtracting the openings and after considering the connection
geometry. The exact definition and calculation rules depend on the method of
measurement used. |
IfcVolumeQuantity |
HISTORY New entity in IFC
Release 1.0, the entity has changed in IFC Release 2x.
ISSUE See issue log
for issues raised in IFC Release 1.5, 1.5.1, 2x
Geometry Use Definitions:
The geometric representation of IfcWall is given by the
IfcProductDefinitionShape, allowing multiple geometric representation.
Included are:
Local Placement
The local placement for IfcWall 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.
- The PlacementRelTo relationship of IfcLocalPlacement shall point (if
given) to the local placement of the same IfcSpatialStructureElement , which is
used in the ContainedInStructure inverse attribute, or to an spatial structure
element at a higher level, referenced by that.
- If the relative placement is not used, the absolute placement is
defined within the world coordinate system.
Geometric Representations
The geometric representations that are defined at the level of the
supertype IfcBuildingElement. A more restricted geometry definition is given at
the level of the subtypes IfcWallStandardCase.
Connection Geometry
The connection between two walls is represented by the
IfcRelConnectsPathElements. The use of the parameter of that relationship
object is defined at the level of the subtypes of IfcWall and at the
IfcRelConnectsPathElements.
