The concept of 'Space boundary' defines the boundaries of a space. The boundaries are a property of the space and they sit between the space object and the actual boundary objects (walls and slabs). The purpose of the space boundaries is to enable energy related calculations and they could in a very limited fashion be used for quantity takeoff. There is a lot to be improved in this concept so don't expect too much of it. There is a detailed paper that deals with just space boundaries.
The geometric representation of a space boundary is a single 3D polyline that can't have voids.
View considerations
- Arch. design >> Quantities take off / cost estimating
- Very limited use possible at the moment, not implemented by anybody I know
- Arch. design >> Thermal load calculations / HVAC system design
- Central role in associating spaces with their bounding elements. These relationships could also be calculated from space and wall/slab geometry, but this is a quite complex task
Documents
- IFCR2_SpaceBoundaries_991124_jh.pdf
- IFCR2_SpaceToWallConnection_991026_jh.pdf
- IFCR2_Label_000331_jh.pdf
Used by views
- Arch. design >> Quantities take off
- Arch. design >> Thermal load calculations / HVAC system design
IfcSpaceBoundary
GlobalId
OwnerHistory
Owner history [all]
Label
UserDefinedType
IsContainedBy
Containment [all]
RelatingObject
Building storey [all]
LocalPlacement
Relative placement [all]
PlacementRelTo
Building storey [all]
Representations
Geometric representation [all]
Items
2D boundary: arbitrary [1,3,5]
PhysicalOrVirtualBoundary
InternalOrExternalBoundary
calcBoundarySurfaceArea
Bounds
Space [all]
ProvidedBy
Element to space boundary connection [1,3]
Uses concepts
2D boundary: arbitrary [1,3,5]
Building storey [all]
Containment [all]
Element to space boundary connection [1,3]
Geometric representation [all]
Owner history [all]
Relative placement [all]
Space [all]
Used by concepts
Element to space boundary connection
Space
Copyright © 2000-2002 BLIS-Project [BLIS, Registered Organization]
Author: Jiri Hietanen (jiri@blis-project.org)
All rights reserved.