2.2 Layer Standards
All CAD drawings submitted for ATL capital projects must comply with the layer naming conventions outlined below. Consistent layer usage ensures interoperability across disciplines and supports downstream asset management.
Standard Layer Naming Format
The required format for CAD layer names is as follows:
[DisciplineCode]-[ElementCode]-[Modifier]- Example:
A-WALL-FULL
| Component | Description |
|---|---|
DisciplineCode | 1–2 letters identifying the discipline (e.g., A = Architecture, C = Civil) |
ElementCode | Describes the drawing element (e.g., WALL, DOOR, GRID) |
Modifier | Optional modifier for layer specificity (e.g., DEMO, NEW, EXIST) |
Example Layer Codes
C-GRID-MAIN— Civil grid lines (main)M-HVAC-DEMO— Mechanical demo HVAC layerE-LTNG-EXIST— Existing electrical lighting layout
Special Layer Color Standards
Color assignments should follow the NCS/CTB (color table) conventions unless otherwise noted in project-specific CAD deliverable guidance.