IfcPlateType
Definition from IAI: The element type IfcPlateType defines a list of commonly shared property set definitions of a thin planar element and an optional set of product representations (i.e. the specific product information, that is common to all occurrences of that product type).
NOTE The product representations are defined as representation maps (at the level of the supertype IfcTypeProduct, which gets assigned by an element occurrence instance through the IfcShapeRepresentation.Item[1] being an IfcMappedItem.
A plate type is used to define the common properties of a certain type of a plate that may be applied to many instances of that type to assign a specific style. Plate types may be exchanged without being already assigned to occurrences. It is used to define a planar, or plate-like parts to be located by one or several instances of IfcPlate.
The occurrences of the IfcPlateType are represented by instances of IfcPlate.
HISTORY New entity in IFC Release 2x2
Use definition for steel members
When using the IfcPlateType as underlying type for steel members in steel construction applications the following additional conventions apply:
Material association:
The IfcPlateType is associated
with exactly one instance of IfcMaterial by the
IfcRelAssociatesMaterial relationship. This material
association assigns
a common material to all occurrences (IfcPlate) of
the
IfcPlateType. If an individual occurrence has an own
material assignment
(see IfcPlate), then that assignment overrides the
material assignment
given at the IfcPlateType.
Geometric representation:
The plate type must have a full
geometric representation, normally given by IfcExtrudedAreaSolid.
Possibly standardized profile names for the plate have no meaning. The
IfcPlateType has (at least) one representation map
assigned through the
RepresentationMaps relation. The representation map
has a full geometric
representation given by:
Position number:
The position number is specified in the
attribute IfcTypeProduct.Tag.
Non geometric profile properties:
Non geometric profile
properties (for instance mechanical properties) are specified through
IfcProfileProperties (and its specific subtypes that
are related to the
cross section). These properties are attached to IfcPlateType
by the
relationship IfcRelAssociatesProfileProperties. If
an individual
occurrence has an own profile property assignment (see IfcPlate),
then
this assignment overrides the profile property assignment given in
IfcPlateType.
Quantity related properties:
Quantity related
properties,which do not relate to the profile, are specified through
IfcElementQuantity (and its specific subtypes).
These properties are
attached to the IfcPlateType by the relationship
IfcRelDefinesByProperties. If an individual
occurrence has an own
element quantity assignment (see IfcPlate), then
this assignment
overrides the quantity assignment given in IfcPlateType.
The following
quantities are foreseen, but will be subjected to the local standard of
measurement used:
| Name | Description | Value Type |
| CrossSectionArea | Total area of the cross section (or profile) of the plate (or its basic surface area). The exact definition and calculation rules depend on the method of measurement used. | IfcQuantityArea |
| GrossVolume | Total gross volume of the plate, not taking into account possible processing features (cut-outs, etc.) or openings and recesses. The exact definition and calculation rules depend on the method of measurement used. | IfcQuantityVolume |
| NetVolume | Total net volume of the plate, taking into account possible processing features (cut-outs, etc.) or openings and recesses. The exact definition and calculation rules depend on the method of measurement used. | IfcQuantityVolume |
| GrossWeight | Total gross weight of the plate without add-on parts, not taking into account possible processing features (cut-outs, etc.) or openings and recesses. | IfcQuantityWeight |
| NetWeight | Total net weight of the plate without add-on parts, taking into account possible processing features (cut-outs, etc.) or openings and recesses. | IfcQuantityWeight |
EXPRESS specification:
|
| PredefinedType | : | Identifies the predefined types of a planar structural member element from which the type required may be set. |
| WR1 | : | The plate type shall have only one material definition associated to it. |
|