Design grid

Definition

The concept of 'Design grid' defines a hierarchical grid system:

• Design grid contains one or more grid levels
• Grid level contains one or more grid axis
• Grid level contains one or more grid intersections.

The grid axis in this concept is defined to be a polyline consisting only of straight segments. The IFC model also allows the grid axis to be a composite curve with arc and elliptical arc segments. This can be added to the concept if needed.

Used by views

• This concept is not used by any view.

Data structure

IfcDesignGrid
GlobalId
OwnerHistory
Label
GridPurpose
LocalPlacement
Relative placement [all]
PlacementRelTo
HasGridLevels
IfcGridLevel
GlobalId
OwnerHistory
Owner history [all]
Label
PartOfDesignGrid
IfcDesignGrid
GridLevelHeight
GridLevelName
HasGridAxes
IfcGridAxis
GlobalId
OwnerHistory
Owner history [all]
Label
PartOfGridLevel
IfcGridLevel
AxisTag
AxisCurve
IfcPolyline
Points
IfcCartesianPoint
Coordinates
SameSenseAsBaseCurve
AlignedGridIntersections
IfcGridIntersection
GlobalId
OwnerHistory
Label
AlignedWithAxes
IfcGridAxis
IntersectionPoint
IfcCartesianPoint
Coordinates

Uses concepts

Owner history [all]
Relative placement [all]

Copyright © 2000-2002 BLIS-Project [BLIS, Registered Organization]
Author: Jiri Hietanen (jiri.hietanen@qpartner.com)
All rights reserved.