# Ceramic Hang Drawing Brief

## Required Views

- Top view with center ding, outer tone-field layout, note labels, field axes, and radial datum.
- Side section through center showing upper dome, lower shell, rim seam, wall thickness, and gu.
- Tone-field detail showing raised/thinned field geometry, relief boundary, thickness target, and strike zone.
- Bottom view showing gu diameter, lower shell curvature, support/rim datum, and optional feet or stand interface.
- Mold split view showing upper mold, lower mold, registration, cottle clearance, and release directions.
- Firing support view showing setter/ring contact areas and shrinkage clearance.

## Critical Dimensions

| Dimension | Why It Matters |
| --- | --- |
| Outer diameter | Ergonomics, mold size, shell volume |
| Dome height | Body volume and shell stiffness |
| Wall thickness | Tone, durability, drying risk |
| Tone-field major/minor axes | Primary pitch lever |
| Tone-field thickness | Primary pitch lever |
| Relief boundary depth/radius | Field isolation and crack risk |
| Gu diameter and wall | Helmholtz/body coupling |
| Rim seam width | Strength and joining repeatability |
| Master scale factor | Fired final geometry |

## CAD Notes

- Mark all values as fired dimensions or master dimensions.
- Keep tone-field geometry as named parameters.
- Add build ID and CAD revision to every drawing.
- Do not hide the `TBD` status of ceramic material constants.
- Include a validation table once measured data exists.