How to Fix Offset Issues in Revit Models and Buildings

Solution to Revit Model and Building Offset Issues

Setting Up the Revit Model

When positioning the axis grid, failing to ensure alignment between the base map and the axis grid early on—or lacking local building references within the large axis grid provided by the building—can easily lead to discrepancies between the mechanical & electrical (M&E) models and the civil engineering models. This issue becomes apparent when you need to draw the positioning axis grid yourself.

If the project features only a few pipelines and no fixed mechanical equipment, it might be possible to align the M&E model with the civil engineering model by selecting both the base map and M&E model and moving them together. However, once all M&E models are merged, simply using the Move command to correct any displacement is no longer effective.

In such cases, the following procedure should be followed to properly align the models:

1. Open the offset file of the electromechanical model and measure the exact offset values along the X and Y axes. Then, navigate through Model Category → Venue → Measurement Points and Project Base Points to confirm these measurements.
2. Identify the location of the project baseline and measurement points within the grid.
3. Delete all mechanical and electrical models and base maps from the file, then save this Revit file separately on your desktop.
4. Open the original file, select all grids, and move them according to the measured X and Y offsets so the M&E model aligns correctly within the grid.
5. Lock the grids, select all mechanical and electrical models, then click Modify → Create Group and assign a name to this group.
6. Open a Revit file containing only a grid (saved on the desktop). Without closing the processed model, select the M&E model group, then choose Modify → Copy. Move the copied reference point to match the original project reference point and measurement point on the grid.
7. In the grid-only model, select Modify → Paste → Paste from Clipboard. Move the mouse to the project base point and measurement point locations and paste the model accordingly.

After pasting, the electromechanical model will be correctly positioned on the grid, maintaining its relative location to the entire project’s base and measurement points. This confirms the M&E model is properly aligned when imported into the civil engineering model.

First, verify the model’s position within the civil engineering environment. Once confirmed, disassemble the copied M&E model to restore it as a complete and fully adjustable model.

Why This Method Matters

During model construction, it’s common to encounter misalignments between mechanical & electrical models and civil engineering models. Traditionally, the adjustment goal was achieved by moving the model as a whole. However, when dealing with complex models containing many structures, moving the entire model becomes impractical.

This procedure provides a practical and effective solution to accurately align complex M&E models with civil engineering grids, ensuring coordination without compromising model integrity.

xuebim

Follow the latest BIM developments in the architecture industry, explore innovative building technologies, and discover cutting-edge industry insights.

← Scan with WeChat