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<h4 class="std">4.10.2.5 Clearance Geometry</h4>
<p>Elements requiring surrounding space for clearance provide a 'Clearance' representation. The reason for clearance space may be due to ventilation, maintenance, or other purpose.  Examples of such elements include boilers and chillers.  Such representation may be used for interference checks, where the 'Clearance' representation must not intersect with the 'Body' representation of other objects, though may intersect with the 'Clearance' representation of other objects.
</p><p>Figure 56 illustrates an instance diagram.</p>
<table><tr><td><img alt="Clearance Geometry" src="diagrams/clearance-geometry.png" usemap="#f56"><map name="f56"><area shape="rect" coords="8,8,176,392" href="../ifcproductextension/lexical/ifcelement.htm" alt="IfcElement"><area shape="rect" coords="208,8,376,80" href="../ifcrepresentationresource/lexical/ifcproductdefinitionshape.htm" alt="IfcProductDefinitionShape"><area shape="rect" coords="408,8,576,116" href="../ifcrepresentationresource/lexical/ifcshaperepresentation.htm" alt="IfcShapeRepresentation"><area shape="rect" coords="608,8,776,116" href="../ifcrepresentationresource/lexical/ifcgeometricrepresentationcontext.htm" alt="IfcGeometricRepresentationContext"><area shape="rect" coords="608,128,776,140" href="../ifcmeasureresource/lexical/ifclabel.htm" alt="IfcLabel"><area shape="rect" coords="608,152,776,164" href="../ifcmeasureresource/lexical/ifclabel.htm" alt="IfcLabel"><area shape="rect" coords="608,176,776,212" href="../ifcgeometryresource/lexical/ifcboundedsurface.htm" alt="IfcBoundedSurface"></map></td></tr><tr><td><p class="figure">Figure 56 &mdash; Clearance Geometry</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="../ifchvacdomain/lexical/ifcchiller.htm">IfcChiller</a></td><td>-<br>-</td>
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<tr><td><a href="../ifcelectricaldomain/lexical/ifcelectricgenerator.htm">IfcElectricGenerator</a></td><td>-<br>-</td>
<td>-<br>-</td>
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<td>R<br>R</td>
<td>O<br>O</td>
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<tr><td><a href="../ifcelectricaldomain/lexical/ifcelectricmotor.htm">IfcElectricMotor</a></td><td>-<br>-</td>
<td>-<br>-</td>
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<td>O<br>O</td>
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<tr><td><a href="../ifcelectricaldomain/lexical/ifcelectricmotortype.htm">IfcElectricMotorType</a></td><td>-<br>-</td>
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<tr><td><a href="../ifchvacdomain/lexical/ifcflowmeter.htm">IfcFlowMeter</a></td><td>-<br>-</td>
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<tr><td><a href="../ifchvacdomain/lexical/ifcpump.htm">IfcPump</a></td><td>-<br>-</td>
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<tr><td><a href="../ifcelectricaldomain/lexical/ifctransformer.htm">IfcTransformer</a></td><td>-<br>-</td>
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<tr><td><a href="../ifchvacdomain/lexical/ifcunitaryequipment.htm">IfcUnitaryEquipment</a></td><td>-<br>-</td>
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</tr>
</table>
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