Model Setup Standards

Source section: 5. Model Setup Standards

5.1 Startup Model Requirements

Each discipline model must be created from the approved project template and include:

• Approved project units

• Project base point

• Survey point

• Shared coordinate setup

• Levels and grids

• Worksets or equivalent model organization

• Approved view templates

• Approved sheet templates

• Standard parameters

• Standard naming conventions

5.2 Revit Project Template Selection

New Revit projects must start from the approved current project templates in the active T:\Revit\ root structure.

Current active Revit project-start templates:

• Template Use: Default S3 project start
  Current Template Path: T:\Revit\000000_24A_Default.rte
  Status: Current active template

• Template Use: Yoga Joint project start
  Current Template Path: T:\Revit\000000_24A_Yoga.rte
  Status: Current active template

Legacy source / reference templates:

• Template Use: Default S3 project template legacy reference
  Legacy Path: T:\Revit\Legacy\Project Templates\S3 Design - Project Template - 2026.rte
  Status: Legacy reference only

• Template Use: Yoga Joint project template legacy reference
  Legacy Path: T:\Revit\Legacy\Project Templates\Yoga Joint\Yoga Joint template 2026.rte
  Status: Legacy reference only

Template rules:

• Do not start new projects directly from T:\Revit\Legacy\.

• Do not edit templates inside T:\Revit\Legacy\.

• Use the current active root-level templates in T:\Revit\ for new project starts.

• If a legacy template must become the current approved template, DT Cadre / Design Technology must copy or promote it into the active T:\Revit\ root structure before use.

• Archived, generic, vendor-default, and working-file templates inside Legacy are not approved project-start templates unless DT Cadre / Design Technology explicitly approves them.

5.3 Coordinates

Coordinate setup must be completed before discipline production begins.

Required actions:

1. Confirm source of truth for survey information.

2. Establish project base point and survey point.

3. Confirm true north and project north.

4. Publish or acquire shared coordinates as required.

5. Test model linking between disciplines.

6. Document coordinate decisions in the BIM Execution Plan.

5.4 Levels and Grids

Levels and grids must be established from the approved architectural or control model unless the BIM Execution Plan defines another source.

Rules:

• Do not create duplicate unmanaged levels or grids.

• Do not rename shared levels or grids without approval.

• Document any discipline-specific levels.

• Lock or monitor linked levels and grids where required by the platform workflow.

5.5 Grid Line Standard

Alpha and Numeric Designations

Grid line designations must follow a consistent alpha / numeric structure.

Rules:

• The long side of the building must be numbered.

• The short side of the building must be lettered.

• The bottom-left-most portion of the structure is the origin for all grid designations.

• Designations proceed bottom to top and left to right.

• Intermediate grids use the X.# format and are reserved for secondary structural elements.

• The intermediate number is based on the relative location to the nearest integer or letter grid.

• All letters must be uppercase.

• Do not use the letter O.

• Do not use the letter I.

Dimensional Accuracy and Maintenance

A dedicated coordination view is required for grid line review.

Coordination view requirements:

• Only grid lines, the elements they define, and dimensions should be visible.

• The view must be used to confirm grid line dimensions and identify small tolerance errors.

High-precision dimension check:

1. Open Project Units.

2. Set Length format units to Decimal inches.

3. Set rounding to Custom.

4. Set rounding increment to:

Value: 0.000000000001

1. Review grid dimensions in both the X and Y directions.

2. Adjust all grid line dimensions from the origin.

3. Push tolerance errors away from the origin where adjustment is required.

4. Target dimensions to the nearest inch when this does not change design intent.

5. Pin all grid lines after dimensions are confirmed.

Grid Line Lock Design Option

After grid lines are confirmed:

1. Create a design option.

2. Create or select the required option set.

3. Rename the option set:

Value: Grid Line Lock

1. Add all confirmed grid lines to the Grid Line Lock option.

2. Keep grid lines pinned after confirmation.

3. Do not modify locked grid lines without BIM manager approval.