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<h3 class="std">4.10.1 Placement</h3>

      <p class="std">
        Product occurrences can be placed in 3D space relative to
        where they are contained. Placement is defined by a
        relative position (X, Y, Z coordinates), a horizontal
        reference direction, and a vertical axis direction. At the
        outermost level, relative directions are defined according
        to representation context; for example, +X may point east,
        +Y may point north, and +Z may point up.
      </p>
      <p class="std">
        Placement follows aggregation and containment relationships
        as follows:
      </p>
      <ul class="std">
        <li class="std">at the outermost level, a site is globally
        positioned according to latitude, longitude, and elevation;
        </li>
        <li class="std">for spatial structures, positioning is
        relative to aggregation. For example, a site may aggregate
        multiple buildings, each building may aggregate multiple
        building storeys, and each building storey may aggregate
        multiple spaces;
        </li>
        <li class="std">for building elements, positioning is
        relative to the containing spatial structure. For example,
        a building storey may contain slabs, walls, columns, and
        beams;
        </li>
        <li class="std">for aggregated parts, positioning is
        relative to aggregation. For example, a staircase may
        aggregate one or more stair flights;
        </li>
        <li class="std">for feature elements, positioning is
        relative to the affected building element. For example, an
        opening element is positioned relative to the wall it
        voids, which in turn is positioned relative to a building
        storey;
        </li>
        <li class="std">for fillings, positioning is relative to
        the filled opening. For example, a door is positioned
        relative to an opening which in turn is positioned relative
        to a wall;
        </li>
        <li class="std">for distribution ports, positioning is
        relative to the containing distribution element. For
        example, an air terminal may have a port connection for a
        duct segment or fitting;
        </li>
        <li class="std">for distribution elements, positioning is
        relative to the containing spatial structure, however may
        be constrained by port connections. For example, a
        electrical junction box may fill an opening within a wall,
        and the junction box may contain ports for contained
        outlets or switches; the placement of such connected
        elements is contrained relative to connected port of the
        junction box. As another example, an air terminal may fill
        a ceiling covering which is placed relative to a space; the
        placement of a connecting duct fitting may be constrained
        relative to the air terminal.
        </li>
      </ul>
      <p class="std">
        If a containing spatial structure contains a grid, then
        placement may also be based relative to grid coordinates.
      </p>
      
                <p>Figure 36 illustrates an instance diagram.</p>
<table><tr><td><img alt="Placement" src="diagrams/placement.png" usemap="#f36"><map name="f36"><area shape="rect" coords="8,8,176,248" href="../ifckernel/lexical/ifcproduct.htm" alt="IfcProduct"><area shape="rect" coords="208,8,376,68" href="../ifcgeometricconstraintresource/lexical/ifclocalplacement.htm" alt="IfcLocalPlacement"><area shape="rect" coords="408,8,576,68" href="../ifcgeometricconstraintresource/lexical/ifclocalplacement.htm" alt="IfcLocalPlacement"><area shape="rect" coords="408,80,576,152" href="../ifcgeometryresource/lexical/ifcaxis2placement3d.htm" alt="IfcAxis2Placement3D"><area shape="rect" coords="608,8,776,56" href="../ifcgeometryresource/lexical/ifccartesianpoint.htm" alt="IfcCartesianPoint"><area shape="rect" coords="608,68,776,116" href="../ifcgeometryresource/lexical/ifcdirection.htm" alt="IfcDirection"><area shape="rect" coords="608,128,776,176" href="../ifcgeometryresource/lexical/ifcdirection.htm" alt="IfcDirection"></map></td></tr><tr><td><p class="figure">Figure 36 &mdash; Placement</p></td></tr></table>

<hr>
<h4>Electrical System Design</h4>
<p>This concept is used by entities for exchanges as shown.</p>
<table class="exchange">
<tr><td></td><td><a href="../views/electrical-system-design/facility-criteria.htm"><image width="16" src="../../img/mvd-facility-criteria.png" title="Facility Criteria"></image></a></td>
<td><a href="../views/electrical-system-design/discipline-specifications.htm"><image width="16" src="../../img/mvd-discipline-specifications.png" title="Discipline Specifications"></image></a></td>
<td><a href="../views/electrical-system-design/project-definition.htm"><image width="16" src="../../img/mvd-project-definition.png" title="Project Definition"></image></a></td>
<td><a href="../views/electrical-system-design/space-program.htm"><image width="16" src="../../img/mvd-space-program.png" title="Space Program"></image></a></td>
<td><a href="../views/electrical-system-design/product-program.htm"><image width="16" src="../../img/mvd-product-program.png" title="Product Program"></image></a></td>
<td><a href="../views/electrical-system-design/design-early.htm"><image width="16" src="../../img/mvd-design-early.png" title="Design Early"></image></a></td>
<td><a href="../views/electrical-system-design/system-layout.htm"><image width="16" src="../../img/mvd-system-layout.png" title="System Layout"></image></a></td>
<td><a href="../views/electrical-system-design/design-schematic.htm"><image width="16" src="../../img/mvd-design-schematic.png" title="Design Schematic"></image></a></td>
<td><a href="../views/electrical-system-design/product-type-template.htm"><image width="16" src="../../img/mvd-product-type-template.png" title="Product Type Template"></image></a></td>
<td><a href="../views/electrical-system-design/product-template.htm"><image width="16" src="../../img/mvd-product-template.png" title="Product Template"></image></a></td>
<td><a href="../views/electrical-system-design/product-type-selection.htm"><image width="16" src="../../img/mvd-product-type-selection.png" title="Product Type Selection"></image></a></td>
<td><a href="../views/electrical-system-design/system-operation.htm"><image width="16" src="../../img/mvd-system-operation.png" title="System Operation"></image></a></td>
<td><a href="../views/electrical-system-design/design-coordinated.htm"><image width="16" src="../../img/mvd-design-coordinated.png" title="Design Coordinated"></image></a></td>
</tr><tr><td><a href="../ifcproductextension/lexical/ifcbuilding.htm">IfcBuilding</a></td><td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>R<br>R</td>
<td>-<br>-</td>
<td>-<br>-</td>
</tr>
<tr><td><a href="../ifcelectricaldomain/lexical/ifccablecarrierfitting.htm">IfcCableCarrierFitting</a></td><td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>R<br>R</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>R<br>R</td>
<td>-<br>-</td>
<td>R<br>R</td>
</tr>
<tr><td><a href="../ifcelectricaldomain/lexical/ifccablecarriersegment.htm">IfcCableCarrierSegment</a></td><td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>R<br>R</td>
<td>R<br>R</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>R<br>R</td>
<td>-<br>-</td>
<td>R<br>R</td>
</tr>
<tr><td><a href="../ifcelectricaldomain/lexical/ifccablefitting.htm">IfcCableFitting</a></td><td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>R<br>R</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>R<br>R</td>
<td>-<br>-</td>
<td>R<br>R</td>
</tr>
<tr><td><a href="../ifcelectricaldomain/lexical/ifccablesegment.htm">IfcCableSegment</a></td><td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>R<br>R</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>R<br>R</td>
<td>-<br>-</td>
<td>R<br>R</td>
</tr>
<tr><td><a href="../ifchvacdomain/lexical/ifcchiller.htm">IfcChiller</a></td><td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>R<br>R</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>R<br>R</td>
<td>-<br>-</td>
<td>R<br>R</td>
</tr>
<tr><td><a href="../ifcsharedbldgelements/lexical/ifccovering.htm">IfcCovering</a></td><td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>R<br>R</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
</tr>
<tr><td><a href="../ifcsharedbldgserviceelements/lexical/ifcdistributioncircuit.htm">IfcDistributionCircuit</a></td><td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
</tr>
<tr><td><a href="../ifcsharedbldgserviceelements/lexical/ifcdistributionport.htm">IfcDistributionPort</a></td><td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>R<br>R</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>R<br>R</td>
<td>-<br>-</td>
<td>-<br>-</td>
</tr>
<tr><td><a href="../ifcelectricaldomain/lexical/ifcelectricappliance.htm">IfcElectricAppliance</a></td><td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>R<br>R</td>
<td>-<br>-</td>
<td>R<br>R</td>
</tr>
<tr><td><a href="../ifcelectricaldomain/lexical/ifcelectricdistributionboard.htm">IfcElectricDistributionBoard</a></td><td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>O<br>O</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>R<br>R</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>R<br>R</td>
<td>-<br>-</td>
<td>R<br>R</td>
</tr>
<tr><td><a href="../ifcelectricaldomain/lexical/ifcelectricflowstoragedevice.htm">IfcElectricFlowStorageDevice</a></td><td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>R<br>R</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>R<br>R</td>
<td>-<br>-</td>
<td>-<br>-</td>
</tr>
<tr><td><a href="../ifcelectricaldomain/lexical/ifcelectricgenerator.htm">IfcElectricGenerator</a></td><td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>R<br>R</td>
<td>-<br>-</td>
<td>-<br>-</td>
</tr>
<tr><td><a href="../ifcelectricaldomain/lexical/ifcelectricmotor.htm">IfcElectricMotor</a></td><td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>R<br>R</td>
<td>-<br>-</td>
<td>-<br>-</td>
</tr>
<tr><td><a href="../ifchvacdomain/lexical/ifcflowmeter.htm">IfcFlowMeter</a></td><td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>R<br>R</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>R<br>R</td>
<td>R<br>R</td>
<td>R<br>R</td>
</tr>
<tr><td><a href="../ifcproductextension/lexical/ifcgrid.htm">IfcGrid</a></td><td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>R<br>R</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>R<br>R</td>
<td>R<br>R</td>
<td>R<br>R</td>
</tr>
<tr><td><a href="../ifcelectricaldomain/lexical/ifcjunctionbox.htm">IfcJunctionBox</a></td><td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>R<br>R</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>R<br>R</td>
<td>-<br>-</td>
<td>R<br>R</td>
</tr>
<tr><td><a href="../ifcelectricaldomain/lexical/ifclamp.htm">IfcLamp</a></td><td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>R<br>R</td>
<td>-<br>-</td>
<td>R<br>R</td>
</tr>
<tr><td><a href="../ifcelectricaldomain/lexical/ifclightfixture.htm">IfcLightFixture</a></td><td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>R<br>R</td>
<td>-<br>-</td>
<td>R<br>R</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>R<br>R</td>
<td>R<br>R</td>
<td>R<br>R</td>
</tr>
<tr><td><a href="../ifcelectricaldomain/lexical/ifcoutlet.htm">IfcOutlet</a></td><td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>R<br>R</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>R<br>R</td>
<td>-<br>-</td>
<td>R<br>R</td>
</tr>
<tr><td><a href="../ifcelectricaldomain/lexical/ifcprotectivedevice.htm">IfcProtectiveDevice</a></td><td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>R<br>R</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>R<br>R</td>
<td>-<br>-</td>
<td>R<br>R</td>
</tr>
<tr><td><a href="../ifchvacdomain/lexical/ifcpump.htm">IfcPump</a></td><td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>R<br>R</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>R<br>R</td>
<td>-<br>-</td>
<td>R<br>R</td>
</tr>
<tr><td><a href="../ifcproductextension/lexical/ifcsite.htm">IfcSite</a></td><td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>R<br>R</td>
<td>-<br>-</td>
<td>-<br>-</td>
</tr>
<tr><td><a href="../ifcsharedbldgelements/lexical/ifcslabelementedcase.htm">IfcSlabElementedCase</a></td><td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>R<br>R</td>
<td>R<br>R</td>
<td>R<br>R</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>R<br>R</td>
<td>R<br>R</td>
<td>-<br>R</td>
</tr>
<tr><td><a href="../ifcelectricaldomain/lexical/ifcsolardevice.htm">IfcSolarDevice</a></td><td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>R<br>R</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>R<br>R</td>
<td>-<br>-</td>
<td>R<br>R</td>
</tr>
<tr><td><a href="../ifcelectricaldomain/lexical/ifcsolardevicetype.htm">IfcSolarDeviceType</a></td><td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
</tr>
<tr><td><a href="../ifcproductextension/lexical/ifcspace.htm">IfcSpace</a></td><td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>R</td>
<td>-<br>R</td>
<td>R<br>R</td>
<td>-<br>R</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>R</td>
<td>-<br>R</td>
<td>-<br>R</td>
</tr>
<tr><td><a href="../ifcelectricaldomain/lexical/ifcswitchingdevice.htm">IfcSwitchingDevice</a></td><td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>R<br>R</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>R<br>R</td>
<td>-<br>-</td>
<td>R<br>R</td>
</tr>
<tr><td><a href="../ifcelectricaldomain/lexical/ifctransformer.htm">IfcTransformer</a></td><td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>R<br>R</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>R<br>R</td>
<td>-<br>-</td>
<td>R<br>R</td>
</tr>
<tr><td><a href="../ifcproductextension/lexical/ifctransportelement.htm">IfcTransportElement</a></td><td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>R<br>R</td>
<td>-<br>-</td>
<td>-<br>-</td>
</tr>
<tr><td><a href="../ifchvacdomain/lexical/ifcunitaryequipment.htm">IfcUnitaryEquipment</a></td><td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>R<br>R</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>R<br>R</td>
<td>-<br>-</td>
<td>R<br>R</td>
</tr>
<tr><td><a href="../ifcsharedbldgelements/lexical/ifcwallelementedcase.htm">IfcWallElementedCase</a></td><td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>R<br>R</td>
<td>R<br>R</td>
<td>R<br>R</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>R<br>R</td>
<td>R<br>R</td>
<td>-<br>R</td>
</tr>
</table>
<p><a href="../../link/placement.htm" target="_top"><img src="../../img/permlink.png" style="border: 0px" title="Link to this page" alt="Link to this page">&nbsp; Link to this page</a></p>
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