Building & Civil Resources

Description of XML Elements

The table below describes elements and their possible attributes.

With the BIM Completeness command, you can check extensions according to the given LOD above, and identify the lacks of information (attributes). You can also analyze the mockup from a global point of view within the Building and Civil Assemblies app.

Supported Standards

Example of Supported Standards

standards version="1">  
<standard name="IFC4" activated="true"/>  
<standard name="OmniClass_Table_11" activated="false"/>  
<standard name="OmniClass_Table_12" activated="false"/>  
<standard name="OmniClass_Table_13" activated="false"/>  
<standard name="OmniClass_Table_14" activated="false"/>  
<standard name="OmniClass_Table_21" activated="false"/>  
<standard name="OmniClass_Table_22" activated="false"/>  
<standard name="OmniClass_Table_23" activated="false"/>  
<standard name="OmniClass_Table_31" activated="false"/>  
<standard name="OmniClass_Table_32" activated="false"/>  
<standard name="OmniClass_Table_33" activated="false"/>  
<standard name="OmniClass_Table_34" activated="false"/>  
<standard name="OmniClass_Table_35" activated="false"/>  
<standard name="OmniClass_Table_36" activated="false"/>  
<standard name="OmniClass_Table_41" activated="false"/>  
<standard name="OmniClass_Table_49" activated="false"/>  
<standard name="Uniformat_II_Elemental_Classification" activated="false"/>  
<standard name="Proposed_Uniformat_II_Bridge_Elements" activated="false"/>
</standards>

Alignment Design Rules Definition

Example of Radius Table

<Alignments> 

    <!-- ********************* -->
    <!--      Radius Tables    -->  
    <!-- ********************* -->  

    <RadiusTables>

        <!--   Sample Radius Table by speed values   -->        


          <RadiusTable Name="DefaultRadiusBySpeed">      
           <HorizontalRadiusTable>        
             <Radius Speed="40km_h"  Minimum="40m"/>        
             <Radius Speed="60km_h"  Minimum="120m"/>        
             <Radius Speed="80km_h"  Minimum="240m"/>        
             <Radius Speed="100km_h" Minimum="400m"/>        
             <Radius Speed="120km_h" Minimum="665m"/>      
           </HorizontalRadiusTable>
           <VerticalRadiusTable>        
             <CrestRadiusTable>
               <Radius Speed="40km_h"  Minimum="500m"/>          
               <Radius Speed="60km_h"  Minimum="1500m"/>
               <Radius Speed="80km_h"  Minimum="3000m"/>
               <Radius Speed="100km_h" Minimum="6000m"/>
               <Radius Speed="120km_h" Minimum="12000m"/>
             </CrestRadiusTable>   
             <SagRadiusTable>
                <Radius Speed="40km_h"  Minimum="700m"/>          
                <Radius Speed="60km_h"  Minimum="1500m"/>          
                <Radius Speed="80km_h"  Minimum="2200m"/>          
                <Radius Speed="100km_h" Minimum="3000m"/>  
                <Radius Speed="120km_h" Minimum="4200m"/>        
                </SagRadiusTable>      
             </VerticalRadiusTable>    
      </RadiusTable>        

         <!--  Sample Radius Table by category values  -->    

            <RadiusTable Name="DefaultRadiusByCategory">    
               <HorizontalRadiusTable>        
                  <Radius Category="R60"  Minimum="120m"/>        
                  <Radius Category="R80"  Minimum="240m"/>        
                  <Radius Category="T80"  Minimum="240m"/>        
                  <Radius Category="T100" Minimum="425m"/>
              </HorizontalRadiusTable>      
              <VerticalRadiusTable>        
                <CrestRadiusTable>          
                  <Radius Category="R60"  Minimum="1500m"/>          
                  <Radius Category="R80"  Minimum="3000m"/>          
                  <Radius Category="T80"  Minimum="3000m"/>          
                  <Radius Category="T100" Minimum="6000m"/>  
                 </CrestRadiusTable>        
                 <SagRadiusTable>          
                   <Radius Category="R60"  Minimum="1500m"/>          
                   <Radius Category="R80"  Minimum="2200m"/>          
                   <Radius Category="T80"  Minimum="2200m"/>          
                   <Radius Category="T100" Minimum="3000m"/>        
                 </SagRadiusTable>      
               </VerticalRadiusTable>    
              </RadiusTable>
        </RadiusTables>

Design Rules: Example of Length Table

<!-- ********************* --> 
 <!--    Length Tables      -->
 <!-- ********************* -->
  <LengthTables>

      <!--   Sample Length Table by speed values   -->    

      <LengthTable Name="DefaultLengthBySpeed">      
        <HorizontalLengthTable>        
          <LineLengthTable>          
              <Length Speed="40km_h"  Minimum="110m"/>          
              <Length Speed="60km_h"  Minimum="150m"/>          
              <Length Speed="80km_h"  Minimum="210m"/>          
              <Length Speed="100km_h"  Minimum="260m"/>          
              <Length Speed="120km_h"  Minimum="280m"/>        
             </LineLengthTable>        
             <ArcLengthTable>
               <Length Speed="40km_h"  Minimum="40m"/>          
               <Length Speed="60km_h"  Minimum="50m"/>          
               <Length Speed="80km_h"  Minimum="70m"/>          
               <Length Speed="100km_h"  Minimum="90m"/>          
               <Length Speed="120km_h"  Minimum="110m"/>        
             </ArcLengthTable>        
             <TransitionLengthTable>          
               <Length Speed="40km_h"  Minimum="40m"/>          
               <Length Speed="60km_h"  Minimum="50m"/>          
               <Length Speed="80km_h"  Minimum="70m"/>          
               <Length Speed="100km_h"  Minimum="90m"/>          
               <Length Speed="120km_h"  Minimum="110m"/>        
             </TransitionLengthTable>      
            </HorizontalLengthTable>      
             <VerticalLengthTable>
                <LineLengthTable>          
                   <Length Speed="40km_h"  Minimum="110m"/>          
                   <Length Speed="60km_h"  Minimum="150m"/>          
                   <Length Speed="80km_h"  Minimum="210m"/>          
                   <Length Speed="100km_h"  Minimum="260m"/>          
                   <Length Speed="120km_h"  Minimum="280m"/>        
                </LineLengthTable> 
             <CrestParabolaLengthTable>
                <Length Speed="50km_h" Minimum="150m"/>
                <Length Speed="70km_h" Minimum="200m"/>
                <Length Speed="90km_h" Minimum="250m"/>
                <Length Speed="110km_h" Minimum="300m"/>
             </CrestParabolaLengthTable >
             <SagParabolaLengthTable >
                <Length Speed="50km_h" Minimum="120m"/>
                <Length Speed="70km_h" Minimum="180m"/>
                <Length Speed="90km_h" Minimum="220m"/>
                <Length Speed="110km_h" Minimum="260m"/>
            </SagParabolaLengthTable >
         </VerticalLengthTable>    
      </LengthTable>  
   </LengthTables>

Design Rules: Example of Gradient Table

<!-- ********************* -->
<!--    Gradient Tables    -->  
<!-- ********************* -->  

<GradientTables>    

  <!--   Sample Gradient Table by speed values   -->    
  <GradientTable Name="DefaultGradientBySpeed">      
     <Gradient Speed="40km_h"  Maximum="7%"/>      
     <Gradient Speed="60km_h"  Maximum="7%"/>      
     <Gradient Speed="80km_h"  Maximum="6%"/>      
     <Gradient Speed="100km_h" Maximum="5%"/>      
     <Gradient Speed="120km_h" Maximum="5%"/>    
   </GradientTable>

   <!--   Sample Gradient Table by category values   -->    

   <GradientTable Name="DefaultGradientByCategory">      
      <Gradient Category="R60"  Maximum="7%"/>      
      <Gradient Category="R80"  Maximum="6%"/>      
      <Gradient Category="T80"  Maximum="6%"/>      
      <Gradient Category="T100" Maximum="5%"/>    
      </GradientTable>  
</GradientTables>

Design Rules: Example of Superelevation Table

Superelevation attainment methods can be defined in a dedicated Business Rule called Alignment superelevation rules available the Building & Civil Resources resource table.

The script below is a stationing script. If no XML resource file is set in Data Setup, the AlignmentDesign.xml file delivered in startup\Civil\AlignmentDesign is used.

When you create a new alignment superelevation rule and assign it to a resource, the resource's input "ThisObject" must be set to "AECAlignment3D" type.

<SuperelevationTables>
  <SuperelevationTable Name="MySuperelevationTable">
    <SuperelevationDesignSpeed Speed="20km_h">
      <Superelevation Radius="75m" tLength="15m" eRate="2.2%"/>
      <Superelevation Radius="51m" tLength="16m" eRate="2.4%"/>
      <Superelevation Radius="38m" tLength="18m" eRate="2.6%"/>
      <Superelevation Radius="30m" tLength="19m" eRate="2.8%"/>
      <Superelevation Radius="24m" tLength="20m" eRate="3%"/>
      <Superelevation Radius="20m" tLength="22m" eRate="3.2%"/>
      <Superelevation Radius="17m" tLength="23m" eRate="3.4%"/>
      <Superelevation Radius="14m" tLength="24m" eRate="3.6%"/>
      <Superelevation Radius="12m" tLength="26m" eRate="3.8%"/>
      <Superelevation Radius="8m" tLength="27m" eRate="4%"/>
      </ SuperelevationDesignSpeed >
    </SuperelevationTable
  <SuperelevationTables>

where:

Element	Description
Speed (input)	Corresponds to the design speed defined in Alignment. The speed value defined in Alignment must match precisely the attribute value Speed defined in the XML design rules. Otherwise the matching table containing rule values will not be found. For example: Ex: if Alignment design speed = 25km/h, no table will be found since parameter Speed = 20km/h.
Radius (input)	Corresponds to the curve radius as per Alignment geometries. If the radius of alignment curve does not match precisely the attribute value Radius, for safety reason the closest lower radius value will always be selected. For example: if curve radius = 28m, select a node the attribute value of which is Radius =24m.
tLength (output)	Corresponds to the transition length.
eRate	Corresponds to the superelevation rate.

Design Rules: Example of Horizontal Radius Tables Depending on Superelevation Rate

<RadiusTable Name="MyRadiusTableSpeed">
      <HorizontalRadiusTable eRate="2%">>
        <Radius Speed="50km_h" Minimum="86m"/>
        <Radius Speed="70km_h" Minimum="203m"/>
        <Radius Speed="80km_h" Minimum="280m"/>
        <Radius Speed="90km_h" Minimum="375m"/>
        <Radius Speed="100km_h" Minimum="492m"/>
      </HorizontalRadiusTable>
      <HorizontalRadiusTable eRate="3%">
        <Radius Speed="50km_h" Minimum="78m"/>
        <Radius Speed="70km_h" Minimum="186m"/>
        <Radius Speed="80km_h" Minimum="240m"/>
        <Radius Speed="90km_h" Minimum="322m"/>
        <Radius Speed="100km_h" Minimum="415m"/>
      </HorizontalRadiusTable>
   </RadiusTable>

Design Rule: Example of Cant Design Table

<CantTables>
  <CantTable Name="MyCantTable">
    <CantDesignSpeed Speed="20km_h">
      <Cant radius="90m" Cant="5mm" tLength="5m"/>
    </CantDesignSpeed>
  </CantTable>
  <CantTable Name="MyCantTableByFormula" formulaId="France">
<CantTables>

where:

Element	Description
Speed (input)	Designs speed defined in Alignment.
Radius (input)	Corresponds to curve radius as per Alignment geometries.
tLength (ouput)	Corresponds to transition length.
Cant (ouput)	Corresponds to superelevation rate.
formulaId (input)	Corresponds to identifier to switch from a formula to another one in dedicated Business rule (see next paragraph).

If no Design Rules are set in Data Setup, default cant tables are provided in startup\Civil\AlignmentDesignRules\RailwayAlignmentDesignRules_Default.xml and are used by default.

Alignment Design Customization

The script below is a stationing script. If no XML resource file is set in Data Setup, the AlignmentDesign.xml file delivered in startup\Civil\AlignmentDesign is used.

<AlignmentDesign>

  <Units>
     <DefaultValues>
       <!-- Default values are used while creating a new alignment, road/railway surface, road/railway design -->
       <!-- Ulterior Data Setup modifications do not impact existing entities -->
       <Speed value="km_h"/> <!--km_h, mph-->
       <Gradient value="%_angle"/> <!--%_angle, m_m, deg, rad, grad, in_ft--> <!-- NOT USED -->
       <Superelevation value="%_angle"/> <!--%_angle, m_m, deg, rad, grad, in_ft-->
       <Cant value="%_angle"/> <!--%_angle, m_m, deg, rad, grad, in_ft--> <!-- NOT USED -->
       <CrossSection>
         <SmallAngle value="%_angle"/> <!--%_angle, m_m, deg, rad, grad, in_ft-->
         <LargeAngle value="m_m"/> <!--%_angle, m_m, deg, rad, grad, in_ft-->
         <LimitSmallLarge value="20%_angle"/>
       </CrossSection>
     </DefaultValues>
   </Units>
  
  <Stationings>

    <!-- Default values are used while creating a new alignment or the first stationing -->
    <!-- Ulterior Data Setup modifications do not impact existing alignments or stationings -->
    <DefaultValues>
      <MajorInterval value="100m"/>
      	<!-- Can be expressed in any length unit e.g. "100 feet"-->
      <MinorInterval value="20m"/>
      <!-- Can be expressed in any length unit e.g. "100 feet"-->
      <StationTextHeightRatio value="0.02"/>
      <!-- Expressed as a ratio of the MajorInterval-->
      <StationOffsetRatio value="1"/>
<!-- Offset between the alignment and the station text. Expressed as a ratio of TextHeight -->
    </DefaultValues>

    <!-- Global values are shared among all alignments contained in a given PLM representation -->
    <!-- They are stored in this representation during the first alignment creation -->
    <!-- Ulterior Data Setup modifications do not impact PLM representations in which alignments were already created -->
    <GlobalValues>
       <!-- Alignment -->
      <LockIntervals value="false"/>
      <!-- true: Major\Minor intervals parameter cannot be edited -->
						<!-- Numbers -->
      <LengthDecimalPlaces value="3"/>
      <LengthDisplayTrailingZeros value="false"/>
      
      <!-- Station annotation -->
      <StationTailRatio value="1"/>
      <!-- Expressed as a ratio of the TextHeight -->
      <StationOverrunRatio value="1"/>
      <!-- Expressed as a ratio of the TextHeight -->

      <!-- Station equation annotation -->
      <StationEquationBackLabel value="@unset"/>
      <!-- @unset to have an internationalized value equivalent to 'BACK' -->
      <StationEquationAheadLabel value="@unset"/>
      <!-- @unset to have an internationalized value equivalent to 'AHEAD' -->
      <StationEquationSideOffsetRatio value="1"/>
      <!-- Expressed as a ratio of the TextHeight -->
      <StationEquationTailRatio value="1"/>
      <!-- Expressed as a ratio of the TextHeight -->
      <StationEquationOverrunRatio value="1"/>
      <!-- Expressed as a ratio of the TextHeight -->
    </GlobalValues>

  </Stationings>

</AlignmentDesign>

Concrete Design Customization

Example of Concrete Design Customization

<ConcreteDesign> 
<Numberings>   
  <!-- Rounding values are used in numbering and report -->    
  <RoundingValues>      
    <!-- Use Rounding -->      
    <UseRounding value="true"/>      
    <!-- true: calculated lengths are rounded with following parameters  -->      
    <!-- false: calculated lengths keep their exact values -->    
  
    <!-- Dimension Rounding Direction  -->      
    <DimensionRoundingDirection value="nearest"/>      
    <!-- Acceptable values are up, down and nearest"-->    
  
    <!-- Total Length Rounding Direction  -->      
    <TotalLengthRoundingDirection value="nearest"/>      
    <!-- Acceptable values are up, down and nearest"-->  
    
    <DimensionRoundingAccuracy value="5mm"/>      
    <!-- Can be expressed in any length unit e.g. "1 feet"-->  
    
    <TotalLengthRoundingAccuracy value="25mm"/>      
    <!-- Can be expressed in any length unit e.g. "1 feet"--> 
  </RoundingValues>    

  <!-- Numbering values are used in numbering -->    
  <NumberingValues>     
    <!-- Adaptive Layers -->      
    <AdaptiveLayersIndividually value="true"/>      
    <!-- true: Number bars individually else Number bars as a whole -->      

    <!--Prefix For Coupler-->   
    <PrefixForCoupler value="(C)"/>      
    <!--Prefix added to the layer bar mark symbolizing the coupler relation-->    
  </NumberingValues>  
  <!-- Numbering display -->
    <Display>
    <!-- Separator used for display between Group and Number -->
    <Separator value="."/>
    </Display>
</Numberings>
</ConcreteDesign>

Railway Attainment Methods

/* ========================================================================== */
/* RailwayAttainmentMethods.CATRule                                           */
/*                                                                            */
/* Sample file to customize Railway attainment methods.      */
/* User can customize this file for each project.                             */
/*                                                                            */
/* ========================================================================== */
/* Defines formulae for the various transition lengths                        */
/* for attaining Cant														  */
/* Based on the following variables                                           */
/*    {l} - spiral length from geometry										  */
/*    {t} - transition length from table								      */
/*    {m} - maximum cant value on Tangent									  */
/*    {a} - applied cant for the curve										  */
/*    {p} - fractional part of transition length achieved before curve point  */
/* ========================================================================== */
/* Defines the following transition lengths (where approriate)                */
/*    LRtoFC - Level Rail to Full Cant                                        */
/*    LRtoBC - Level Rail to Beginning of Curve                               */
/* ========================================================================== */
/* Get inputs */Let l(real)Let t(real)Let m(real)Let a(real)Let p(real)l = Parameters.GetAttributeReal("sLength")t = 
   Parameters.GetAttributeReal("tLength")m = Parameters.GetAttributeReal("MaxCantOnTangent")a = 
   Parameters.GetAttributeReal("Cant")p = ThisObject.GetAttributeReal("TRate")
/* Compute outputs */Let LRtoFC(real)Let LRtoBC(real)if(l>0){	LRtoFC=l	LRtoBC=l*p}else { 	LRtoFC=t	if ( a>0 AND m>0) 
   {		Let threshold(real)		threshold=m/a		if(threshold<p ){			LRtoBC=t*threshold		}		else		{				LRtoBC=t*p		}	}	
   else 	{		LRtoBC=t*p	}}/* Write outputs */Parameters.SetAttributeReal("LRtoFC", 
   LRtoFC)Parameters.SetAttributeReal("LRtoBC", LRtoBC)

Railway Cant and Transition Length Rules

/* ========================================================================== */
/* RailwayCantAndTransitionLengthRules_Sample.CATRule                         */
/*                                                                            */
/* Sample file to calculat cant and transition length.						  */
/* User can customize this file for each project.                             */
/*                                                                            */
/* ========================================================================== */
/* Defines formulas for Cant and transition length.                           */
/* Based on the following variables                                           */
/*    {Id}    - formula identifier given by design rules                      */
/*               -"France": "China" and "CantDeficiency"                      */
/*                   Cant(mm)   = 6*Speed^2/radius                            */
/*                   tLength(m) = max(50,5.8*Speed*Speed*Speed/(180*radius))  */
/*               -"China":                                                    */
/*                   Cant(mm)   = 0.64*t*Speed*Speed/(3.6*3.6*g*radius)       */
/*                   tLength(m) = 0.01*Cant*Speed                             */
/*               -"CantDeficiency":                                           */
/*                   Cant(mm)   = ceil((eqCant-md)*2)/2                       */
/*                   tLength(m) = 0.012*cantDeficiency*Speed                  */
/*    {t}     - track width                                     (m)           */
/*    {s}     - current design speed                            (m/s)         */
/*    {r}     - Curve radius from geometry                      (m)           */
/*    {md}    - maximum allowable cant deficiency               (m)           */
/*    {me}    - maximum allowable cant excess                   (m)           */
/*    {smax}  - maximum speed                                   (m/s)         */
/*    {smin}  - minimum speed                                   (m/s)         */
/*    {g}     - gravity acceleration                            (m/s^2)       */
/* ========================================================================== */
/* Defines cant and transition length values				                  */
/*    cant    -   Applied cant for the curve                      (m)         */
/*    tLength -   Transition length                              (m)          */
/* ========================================================================== */
/* Get inputs */
Let Id  (String)
Let t   (real)Let s   (real)
Let r   (real)Let md  (real)
Let me  (real)Let smax(real)
Let smin(real)

Id    = Parameters.GetAttributeString("FormulaId")
t     = Parameters.GetAttributeReal("TrackWidth")
s     = Parameters.GetAttributeReal("Speed")
r     = Parameters.GetAttributeReal("Radius")
md    = Parameters.GetAttributeReal("MaxCantDeficiency")
me    = Parameters.GetAttributeReal("MaxCantExcess")
smax  = Parameters.GetAttributeReal("MaxSpeed")
smin  = Parameters.GetAttributeReal("MinSpeed")

/* Compute outputs */
Let cant(real)
Let tLength(real)

/* Local attributs */
Let	g   (real)    /*Gravity*/
Let eqCant(real)  /*Equilibrium cant*/
g=9.806

/* Convert Speeds in km_h*/
Let Speed(real)			
Let maxSpeed(Real)
Speed=s*3.6 
maxSpeed =smax*3.6

if(Id=="France"){	
    cant=round(6*Speed*Speed/r)/1000	
    tLength=round(max(10,5.8*Speed*Speed*Speed/(180*r)))
} 
else if (Id=="China")
{	
    cant=round(0.64*t*1000*Speed*Speed/(3.6*3.6*g*r))/1000	
    tLength=round(0.01*cant*1000*Speed)
}
else if(Id=="CantDeficiency") 
{		
    eqCant=round(t*1000*maxSpeed*maxSpeed/(127*r))/1000	
    cant=ceil((eqCant-md)*2000)/2000	

    Let cantDeficiency(real)	
    cantDeficiency=round(t*1000*maxSpeed*maxSpeed/(127*r))/1000-cant	

    tLength=round(0.012*cantDeficiency*1000*Speed)		
}
cant=max(cant,0.005)
tLength=max(tLength,5)

/* Write outputs */
Parameters.SetAttributeReal("Cant", cant)
Parameters.SetAttributeReal("tLength", tLength)

BIM Attribute Completion

You can customize the behavior of BIM attributes by giving them a value through a Business Rule in Data Setup.

To perform an automatic completion of missing IFC attributes in the BIM Attributes panel, you can use the BIM Completeness command that activates the BIM Attribute Completion Business Rule you have assigned to the Building & Civil Resources resource table. Several attributes can be defined/computed in BIM Attributes at the same time which saves time in design.

The Business Rule script below is an example. If no XML resource file is set in Data Setup, the BIMAttributeCompletionRule_Sample.CATRule file delivered in win_b64\resources\knowledge\scripts is used. There is a condition on the Slab Reference and Gross Volume Attributes in the script. Then the Gross Volume is computed and, its value and the slab reference are added in the corresponding attribute boxes in the BIM Attributes panel.

/* ========================================================================== */
/* BIMAttributeCompletionRule_Sample.CATRule                            	  */
/*                                                                         	  */
/* Sample file to automatize the completion of IFC attribute		          */
/*                                                                       	  */
/* ========================================================================== */
/* Based on the following variables                                   	      */
/*    {attributeName}                                                    	  */
/* ========================================================================== */
/* Defines attribute value													  */
/*    {attributeValue}												          */
/* ========================================================================== */


/* Get inputs */
Let attributeName (String)
attributeName = Parameters.GetAttributeString("AttributeName")

/* Write outputs */
if(attributeName=="IfcPset_SlabCommon_Reference"){
	(ThisObject:IfcPset_SlabCommon).IfcPset_SlabCommon_Reference="18.12.0456"
	Parameters.SetAttributeString("AttributeValue", "18.12.0456")
}

if(attributeName=="IfcQto_SlabBaseQuantities_GrossVolume"){	
	Let partBodyList(List)
	partBodyList = ThisObject ->Query("BodyFeature","x.Name like \"*PartBody*\"")

	if(partBodyList.Size() > 0)
	{
		Let volume(VOLUME)
		volume = smartVolume(partBodyList->GetItem(1)) 

		Let skeletonList(List)
		skeletonList = ThisObject ->Query("Feature","x.Name like \"*Skeleton Representation*\"")

		if(skeletonList.Size() > 0)
		{
			Let skeleton(Feature)
			skeleton = skeletonList->GetItem(1)
		
			Let childrenListParam(List)
			childrenListParam = skeleton->Query("AdvisorParameterSet","x.Name like \"Parameters*\"")
		
			Let paramSet(AdvisorParameterSet)
			paramSet = childrenListParam->GetItem(1)
		
			paramSet->SetAttributeReal("IfcQto_SlabBaseQuantities_GrossVolume",volume)
			Parameters.SetAttributeReal("AttributeValue", volume)

		}else{
			(ThisObject:IfcQto_SlabBaseQuantities).IfcQto_SlabBaseQuantities_GrossVolume=volume
			Parameters.SetAttributeReal("AttributeValue", volume)
		}
	}
}