Go from opening size to cut points with a clear drawing.
Result calculated from the displayed dimensions.
| Part | Quantity | Long point | Short point | Saw: angle from a square cut |
|---|---|---|---|---|
| Horizontal | 2 | 18.8976 in | 15.748 in | 45° |
| Vertical | 2 | 26.7717 in | 23.622 in | 45° |
The long point is the outside length of each part; the short point is the visible inner edge. The rabbet extends into the profile width.
Schematic drawing. Written dimensions and the parts list take precedence over screen scale.
How to check this calculation
The reference can be the visible opening, outside size or rabbet opening. Every rectangular corner uses a 45° cut. The long point is the frame exterior; total length excludes saw loss.
Position origin: left edge or base indicated in the drawing.