Sharing Designs in Trimble Connect: Why "Model Space" is not a Drawing
Not version-specific
Stabicad
Context When sharing files with the construction site via Trimble Connect, there is often a conflict between "ease of upload" (Drafter) and "usability" (Field). While sharing a raw
.dwg file seems efficient, it often fails to convey critical project data.The Difference: Workspace vs. Legal Document
• Model Space is a Workspace: This is where you design. It contains live Xrefs, helper lines, and geometry that extends infinitely. It is a "living" environment that changes constantly.
◦ Risk: If shared directly, the field crew sees a "Work in Progress" without context. They cannot easily see if the design is approved, checked, or intended for a specific phase (e.g., Preliminary vs. Construction).
• Paper Space (Layout) is a Deliverable: The Layout represents the "Sheet." It contains the Title Block, which holds the legal metadata of the project:
◦ Status: Is this for Construction or Information?
◦ Revision: Is this the latest version?
◦ Scale: Is the geometry represented accurately?
◦ Scope: The Viewport limits the view to exactly what is relevant, hiding the "noise" of the full model.
The Role of Publishing
The act of "Publishing" (converting the DWG Layout to PDF or a frozen View) acts as a digital signature. It signals to the team: "This drawing is ready."
Creating annotations for revision can be tricky, since the modelspace usally contains only lines (check this article)
Managing Xrefs in Trimble Connect
If you choose to share native
.dwg files instead of PDFs, you must manage Xrefs carefully, or the field will see empty drawings.1. Relative Paths: Ensure all Xrefs are set to "Relative Path" in AutoCAD before uploading.
2. Folder Structure: The folder structure in Trimble Connect must match your local server structure exactly for links to resolve.
3. Origin: Xrefs are placed 'origin to origin' Trimble Connect will not remember replacement
4. The Better Alternative: Use the AutoPublish workflow. This automatically generates a PDF of your Layouts every time you save, ensuring the field always sees the Title Block and correct geometry without Xref issues.
Conclusion
• Share .dwg (Model) for coordination with other designers (BIM).
• Share PDF (Sheets) for the construction site (Production).
The Trade-off: Accuracy vs. Context
While PDF Sheets are safer for "Legal/Status" reasons, the native DWG (Model Space) offers a distinct advantage for the field team regarding Measurement Accuracy:
• DWG (Model Space): No Calibration Needed Stabicad models are drawn at 1:1 scale (1 drawing unit = 1mm). When a field user opens the DWG in Trimble Connect, they can "snap" directly to pipe centerlines or wall corners. The measurement they get is the exact coordinate distance, with zero margin for error.
• PDF (Sheets): Calibration Required A PDF is a "derivative" that has been scaled (e.g., 1:50 or 1:100) to fit a paper size. To measure a distance on a PDF in Trimble Connect, the user must often Calibrate the tool first:
1. Find a known dimension on the drawing (e.g., a scale bar).
2. Click point A and point B.
3. Tell the software "This distance is 5000mm".
◦ Risk: If the user's click is off by a few pixels during calibration, every subsequent measurement will be inaccurate.
Recommendation: If exact field measurements are critical (e.g., for prefabrication checks), provide the DWG but ensure it is clearly marked as "For Reference Only" to distinguish it from the signed PDF contract documents.
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