SITE04 · Transition height from face slant

Measure the two openings

Enter both rectangular openings and the true slant height of a panel whose parallel edges follow the opening length. Both openings are centered. That face uses half the width difference as its perpendicular setback. The tool derives vertical height from the slant and setback. Both opening dimensions must decrease toward the lower opening.

The computed alignment is applied after every calculation, reset and shared-link restore.

How the flat patterns are calculated

For a centered shape, dx = (upper length − lower length) / 2 and dz = (upper width − lower width) / 2. True face heights are √(H² + dz²) for the length-edge panels and √(H² + dx²) for the width-edge panels. A corner edge is √(H² + dx² + dz²). With offsets, each panel uses its own perpendicular setback and along-edge shift.

Each four-corner panel is unfolded by an isometry: all four edges and both diagonals match the 3D panel. The assembly animation rotates each panel rigidly about a reference edge. It does not interpolate or stretch the sheet.

Default example

600 × 400 mm → 400 × 200 mm · H 300 mm True face height: 316.23 mm / 316.23 mm / 316.23 mm / 316.23 mm.

Fabrication and assembly method

1. Inspect the four rectangular panel blanks. These are separate panels, not a continuous tray blank.
2. Mark each true trapezoid outline on its blank. Red lines are the panel cut boundaries.
3. Cut the four panels to the marked outlines; the separated panels show their finished boundaries.
4. Assemble the panels about their lower reference edges and join the corner seams. These edges locate assembly; they do not imply a retained material hinge.

Ideal sharp, zero-thickness panel geometry. Panel dimensions exclude kerf, bend allowance, seams, overlap tabs, fasteners and the openings cut in the parent tray. The assembly is a separate-panel method; confirm the actual joining detail.

Independent TrayNeo panel-development method. Reference-product correspondence remains under review.

Geometry references

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