Export custom lines as split lines.
9. Click Export.
Open the exported DWG with an applicable DWG viewer software. You can see that the solid lines of the steel beam are on one layer and the hidden lines are
DWG and DXF 104 Export a drawing to 2D DWG or DXF
on another layer. You can also see that columns do not match with the layer rules you defined, so they are handled according to other rules.
See below for examples on how the selecting and not selecting Cut lines with text affects the result.
In the following example, Cut lines with text is selected.
In the following example, Cut lines with text is not selected.
DWG and DXF 105 Export a drawing to 2D DWG or DXF
DWG and DXF 106 Export a drawing to 2D DWG or DXF
11 DGN
The DGN format has been used especially for data transfer between plant design programs. It was developed by MicroStation. It is similar to DWG in that it is only a graphical data format. It contains unique part IDs in the given model. It is possible to check for clashes between the Tekla Structures model and a DGN reference model.
This format has the following limitations:
• GUID is not supported
• Change management is not possible with a DGN file.
See also
Reference models (page 36)
Import a reference model (page 37) Export to 3D DGN files (page 110)
11.1 DGN import
You can import DGN models as reference models to Tekla Structures. You can view DGN model objects on different reference model layers according to the level settings in the DGN file. You can use DGN models for clash checking.
Tekla Structures reference model import supports V7 and V8 DGN formats.
A DGN file may contain one or more DGN models. A DGN model can be one of the followiing three types: a design model, an extrusion model or a sheet model. Design models are most useful in Tekla Structures as they contain appropriate structural data. If there are many model types available in a DGN file, Tekla Structures selects the imported model type in the following order:
1. Active model is imported if it is a design model.
2. Default model is imported if it is a design model.
3. If DGN file contains design models, the first one is imported.
DGN 107 DGN import
4. If there are no design models in the DGN file, the first model regardless of the model type is imported.
You can view a DGN import log about DGN import on the Log file tab in Message Panel. To open the Message Panel, go to Quick Launch and typeMessage Panel and select the Message Panel command from the displayed list.
See also
Import a reference model (page 37)
DGN objects supported in reference models (page 108)
11.2 DGN objects supported in reference models
Tekla Structures can display the following DGN objects in reference models:
Object Type no. Description
Cell 2 A collection of grouped entities
with a common insertion point/
origin, scale and orientation in 2D/3D space.
Line 3
Line string 4 A series of interconnected lines.
Shape 6 Like a line string, but closed (first
point = last point).
Text node 7 A multi-line paragraph/block of
text.
Curve 11 A parametric spline curve.
Complex chain 12 A chained collection of other entities (lines, line strings, arcs, curves or b-spline curves).
Complex shape 14 Like a complex chain, but closed (first point = last point).
Ellipse 15
Arc 16
Text 17 Supports TrueType fonts and text
styles (bold, underline, italic, etc).
3D surface 18 Like a 3D solid, but not capped on
the ends.
3D solid 19 The solid created by projecting or
rotating from a boundary entity
DGN 108 DGN objects supported in reference models
Object Type no. Description (line, line string, curve, arc or ellipse).
Cone 23 Actually a truncated cone
described by two parallel circles;
if the radius of both circles is the same, a cylinder is produced.
B-spline surface 24 See description of b-spline curves, which also applies here;
additional data is provided by surface boundary entities (type 25).
B-spline curve 27 Can be rational/non-rational, uniform/non-uniform, open/
closed; entity type 27 supplies header data and additional data is provided by pole entities (type 21), knot entities (type 26) and weight factor entities (type 28).
Shared cell definition 34 Similar to a DWG block definition;
basically defines a set of grouped entities.
Shared cell instance 35 Similar to a DWG block instance;
given a particular cell 'definition', numerous cell 'instances' can be created at differing locations, scales and orientations.
Multiline 36 A set of parallel lines, which can
be jointed (with or without visible seams at the joints), and have various types of end caps (rounded, square, etc).
Mesh 105 Supports indexed face loops,
quad list, quad grid, triangle grid and triangle list meshes.
Smart solid - Smart solids (solids created from
embedded Parasolid/ACIS data) can be imported into Tekla Structures as wireframe outlines.
Limitations
The following objects have specific limitations:
DGN 109 DGN objects supported in reference models
Object Type no. Description
Point string 22 Not supported. (A point
string is a series of points with associated orientations; point strings are typically used for defining walkthrough paths).
Dimension 33 Not supported.
Mesh 105 The point cloud mesh
type is not currently supported.
Smart solid - Smart solids (solids
created from embedded Parasolid/ACIS data) are currently supported as wireframe outlines only;
for this reason, smart solids do not currently participate in clash checking operations.
See also
Import a reference model (page 37) DGN import (page 107)
11.3 Export to 3D DGN files
You can export selected parts or the whole model to 3D DGN.
1. Open a Tekla Structures model.
2. On the File menu, click Export --> 3D DGN . The Export 3D DGN dialog box opens.