Grid Dimension
Verified workflow

Find the command and settings
Open a plan containing visible straight grids. In BimSpeed dot A R C, expand Dim. Use Dim Setting to choose the styles and separation before running Create Grid Dim. The same creation command is also available under Dim, Tag on the structural ribbon.

Set both dimension types
Choose the overall dimension type and the second, or chain, dimension type independently. In this first example both are Diagonal. Distance is five millimeters on paper. At a view scale of one to one hundred, that corresponds to five hundred millimeters in the model. Choose the types first, because changing the overall type can reset Distance.

Create the horizontal chain
Run Create Grid Dim. Click a straight grid at the location where you want the dimension line. You do not need to click every grid. The command collects visible parallel grids in the active view and creates the individual bays and their overall dimension. In this direction the bays add to twenty one thousand three hundred millimeters.

Dimension the perpendicular direction
While the command is still active, pick a grid in the perpendicular direction at the desired location. The vertical bays add to nineteen thousand six hundred millimeters. Press Escape when finished. Keep the dimension lines clear of tags and grid bubbles. These dimensions reference the grids rather than manually typed text.

Change the gap and overall style
Return to Dim Setting. Here we choose a different overall type while retaining Diagonal for the chain. Enter Distance ten after choosing the types, then click OK. At one to one hundred this gives one thousand millimeters of model separation. The type list comes from the current project, so its names may differ in your file.

Compare and inspect the result
Run the command again above the model. The new pair uses the updated gap and overall style. The earlier bottom pair remains. Running the command again adds dimensions; it does not update existing pairs. Select a dimension to verify its type and value in Properties. Delete an unwanted duplicate deliberately or use Undo immediately after creation.

Parallel grids at an angle
Straight grids do not have to be horizontal or vertical. Here three parallel diagonal grids receive a two segment chain and a total of three thousand five hundred ninety millimeters. Pick one of that parallel group at the desired dimension location. Curved grids are unsupported by this command. Fewer than two valid parallel grids cannot form a chain. Save the practice model after inspecting all three directions.