Table 4 Mapping between the proprietary model classes, property types, the R761/R762 main classes and the IFC 2 × 3 classes for the 195 automatically created cost items.

From: Automated quantity take-off in a Norwegian road project

V770 subdomain

Authoring tool

Proprietary model class

Property type 1

Property type 2

R761/R762 main class

IFC 2 × 3 classes

Bridges and constructions

Revit

Revit generic model

R761/R762 class set by Dynamo script

4, 5, 7, 8

IfcBeam; IfcBuildingElementProxy; IfcColumn; IfcCovering; IfcFlowSegment; IfcFooting; IfcMember; IfcPlate; IfcSlab; IfcWall; IfcReinforcingBar

Bridges and constructions

Tekla

Tekla generic object

R761/R762 class set by Grasshopper script

4, 5, 7, 8

IfcBeam;

IfcBuildingElementProxy; IfcColumn; IfcFooting; IfcMember; IfcPlate; IfcRailing; IfcReinforcingBar; IfcSlab; IfcWall

Construction details

Revit

Revit generic model

R761/R762 class set by Dynamo script

7

IfcBeam; IfcColumn

Construction details

Novapoint

Shed

7

IfcSlab

Construction details

Civil 3D

NA

NA

NA

7

IfcBuildingElementProxy

Cabling systems

Novapoint

BaseShaft

object name (string)

4

IfcFlowTerminal

Cabling systems

Novapoint

ConduitPipe

layer name (string)

material/string

4

IfcFlowSegment

Cabling systems

Novapoint

EmbedmentLayer

layer name (string)

4

IfcSlab

Cabling systems

Novapoint

FillLayer

feature subtype (enum)

4

IfcSlab

Earthworks (roads)

Novapoint

Cut

material (enum)

2

IfcSlab

Earthworks (water and sewer/cabling systems)

Novapoint

Cut

4

IfcSlab

Landscape

Novapoint

DitchBottomSurface

DitchSlopeSurface

EmbankmentSlope

object name (string)

7

IfcSlab

Landscape

Novapoint

Kerb

layer name (string)

7

IfcSlab

Landscape

Civil 3D

NA

NA

NA

4, 6, 7

IfcBuildingElementProxy

Lighting

Civil 3D

NA

NA

NA

4, 7

IfcBuildingElementProxy

Road

Novapoint

StructureLayer

feature subtype (enum)

5

IfcSlab

Road

Novapoint

StructureLayer

layer name (string)

5

IfcSlab

Road

Novapoint

StructureLayer

object name (string)

7

IfcSlab

Road

Novapoint

SubgradeDeepBlasted

2

IfcSlab

Road

Novapoint

SubgradeSurface

layer name (string)

5

IfcSlab

Road signs

Novapoint

RoadSignMast

feature subtype (string)

7

IfcSlab

Water and sewer

Novapoint

BaseShaft

usage (string)

4

IfcFlowTerminal

Water and sewer

Novapoint

ConduitPipe

feature subtype (enum)

diameter/string

4

IfcFlowSegment

Water and sewer

Novapoint

FillLayer

feature subtype (enum)

4

IfcSlab

Water and sewer

Novapoint

SewerPipeline

material (enum)

diameter/string

4

IfcFlowSegment

Water and sewer

Novapoint

StormDrainLine

usage (enum)

diameter/string

4

IfcFlowSegment

Water and sewer

Novapoint

WaterPipeline

material (enum)

diameter/string

4

IfcFlowSegment