In short: STAAD.Pro can export your model to AutoCAD as a DXF file, either the whole model in 3D or one plane at a time in 2D. What you get is centre-line geometry: single lines, no section depths, no member marks and no sections table. To get a frame drawing that is ready to detail, with member outlines, merged members and section callouts, use a converter such as STAAD To CAD, then open the DXF in AutoCAD and save it as DWG.

Every structural job reaches the same point. The analysis is done, the sections are final, and someone needs a drawing. In most offices that drawing starts life in AutoCAD, so the question comes up every week: how do I get my STAAD.Pro model into AutoCAD without redrawing it?

This guide covers the three practical routes, what each one gives you, and where the time actually goes.

Can STAAD.Pro export to AutoCAD?

Yes, through DXF. DXF (Drawing Exchange Format) is the open CAD format that AutoCAD, BricsCAD, ZWCAD, DraftSight and most other CAD programs read. STAAD.Pro does not write AutoCAD's native DWG format, but that is rarely a problem: open the DXF in AutoCAD and use Save As to store it as a DWG.

The real question is not whether you can export, but what arrives in AutoCAD and how much work is left before it is a drawing.

Method 1: STAAD.Pro's 3D DXF export

The quickest route is the built-in export. In STAAD.Pro, go to the File menu, open Import/Export, choose Export, and select 3D DXF. Bentley documents the steps in the STAAD.Pro help on exporting to DXF.

What you get:

  • Every member as a DXF line, from node to node.
  • Plates and surfaces as 3D faces.
  • The full 3D model in one file.

This is useful as a background reference or for coordination with an architect's model. It is not a drawing. Every frame, bracing line and purlin sits on top of each other in 3D, and nothing tells you which line is an ISMB 400 and which is an angle.

Method 2: 2D DXF export, one plane at a time

For elevations and plans, choose 2D DXF instead. You pick the plane (XY, YZ or XZ) and a node that sets where the plane cuts through the model, and STAAD writes only the members in that plane. The options also let you include labels and set the text size.

This is closer to a drawing, but the result is still:

  • Single lines. Members are centre lines. There is no flange or web outline, so a 600 mm deep rafter looks the same as a 100 mm purlin.
  • Split members stay split. If your rafter is modelled as six segments for load application or tapering, the DXF has six separate lines.
  • No sections table or callouts that a detailer can use directly.
  • One plane per export. A building with twelve frames and four elevations means a lot of repeated exports.

What's missing, and where the drafting time goes

After a 2D DXF export, a drafter typically still has to:

  1. Offset each centre line to the section depth to show the member outline.
  2. Join split members back into one physical member.
  3. Write the section size and length against every member, or create marks and a sections table.
  4. Put everything on sensible layers: centre lines, outlines, text and tables.

None of this is engineering. It is copying information that already exists in the STAAD model into the drawing by hand, and it is where mistakes creep in: an old section size left on a member, or a length that no longer matches after a revision.

Method 3: STAAD To CAD in SS Workbench

STAAD To CAD is a tool in our SS Workbench that does those steps for you. It reads the members you select in STAAD.Pro, works out the drawing from their real section properties, and gives you a DXF that is ready to detail.

How it works:

  1. Select the frame in STAAD.Pro and click to bring the selected members into STAAD To CAD. It talks to STAAD.Pro on your PC through the free STAAD Connector.
  2. Choose the drawing plane: XY, YZ or XZ.
  3. Merge split members. Combine segments into one member, review the combined depths, or use Auto Merge for the whole frame.
  4. Choose the annotation: full section text on each member (with leader lines for short members), or marks on the members with a sections table beside the drawing listing mark, section, length and quantity.
  5. Skip callouts for members you don't want labelled.
  6. Preview, then download the DXF.

What arrives in AutoCAD:

  • Member outlines drawn to the section depth, with flange lines, not just centre lines.
  • Tapered members drawn with their start and end depths, labelled with web and flange plates (for example W:600~300X6; F:200X10).
  • Separate layers for centre lines, outlines, flanges, annotation and the sections table.
  • A sections table when you choose marks, with MARK, SECTION, LENGTH (m) and QTY columns.

It recognises the section types that steel and PEB frames use: hot-rolled beams (including cover-plated beams), channels, angles, double channels and double angles, RHS, SHS, CHS, pipes, built-up tubes and tapered members. Every change can be undone, and your work is saved, so you can close the tab and come back later.

STAAD To CAD only reads your model. It never writes anything to STAAD.Pro.

Opening the DXF in AutoCAD and saving as DWG

  1. In AutoCAD, use Open and set the file type to DXF.
  2. Run Zoom Extents (Z, then E) to bring the drawing into view.
  3. Check the layers in the Layer Properties Manager and assign your office's colours and line types.
  4. Use Save As and choose AutoCAD Drawing (DWG).

The same DXF opens in BricsCAD, ZWCAD, DraftSight and other CAD software.

Fixing common problems

The drawing is flat or shows the wrong face. The members you exported are not in the plane you chose. Pick the plane that matches your frame: for a Y-up model, an XY frame is a frame in the X direction. STAAD To CAD warns you when the selected members are not in one plane and lets you switch.

Text is too small or huge. Text height is set at export. In STAAD To CAD, set it (in mm) before you generate; 100 to 250 mm suits most frame drawings at 1:50 to 1:100.

A member shows a placeholder section. That member has no section property assigned in STAAD.Pro. Assign the property in STAAD, then bring the frame in again.

Some members won't merge. Members are only merged when they lie in one straight line. A bend in the model, for example at the ridge or a haunch node, keeps them separate on purpose, and STAAD To CAD tells you the angle.

Which method should you use?

You need Use
A 3D background for coordination STAAD 3D DXF export
A quick single-line elevation for a sketch STAAD 2D DXF export
A frame drawing with outlines, merged members and section callouts STAAD To CAD

If you also want to compare these with STAAD's Steel AutoDrafter, read 3 ways to get CAD drawings from a STAAD.Pro model.

Try it on your own model

Open STAAD To CAD in SS Workbench, install the free STAAD Connector, and select a frame in STAAD.Pro. You'll have a DXF in AutoCAD in a couple of minutes. Need the steel tonnage from the same model? MTO Generator works on the same selection.