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+# TRIUMPH! magnetic gaming board
+
+[`triumph_board.scad`](triumph_board.scad) is a parameterized OpenSCAD model of a stackable, double-sided board for 15 mm TRIUMPH! armies.
+
+## Default dimensions
+
+| Feature | Dimension |
+|---|---:|
+| Exposed playing area | 960 × 640 mm |
+| Finished outside size | 1020 × 700 mm |
+| Wooden border width | 30 mm |
+| Finished board depth | 30 mm |
+| Steel core | 24 ga carbon steel, nominally 0.607 mm |
+| Wood thickness per face | 14.6965 mm |
+| Top corner holes | 10 × 10 mm, blind to the steel |
+
+The steel sheet is modeled at the full **1020 × 700 mm** outside size. The two wooden frames cover its 30 mm perimeter, leaving a **960 × 640 mm** exposed steel playing area on either face. This is the standard 24 × 16 base-width battlefield when 40 mm bases are used.
+
+The full-side short-end rails are 30 × 700 × 14.6965 mm. The long-edge rails fill between them and are 960 × 30 × 14.6965 mm. These dimensions describe each face; actual joinery, adhesives, edge treatment, and tolerances remain fabrication decisions.
+
+## Viewing and export
+
+Open the SCAD file and change `display` near the top:
+
+- `"assembled"` — complete board
+- `"exploded"` — separates the layers for inspection
+- `"steel"` — steel sheet only
+- `"top_frame"` — drilled wooden face
+- `"bottom_frame"` — undrilled wooden face
+- `"short_end_piece"` or `"long_edge_piece"` — one representative rail
+
+All important measurements, including the hole size and inset, are parameters near the beginning of the file.
+
+## Construction assumption
+
+“3 cm deep” is interpreted as **30 mm of wood on each side of the sheet**. The steel is centered, giving equal wood thickness on both faces.
+
+The holes are square pockets subtracted through the top wood and stop at the sheet. They are intentionally absent from the opposite face; the future peg geometry is not included.