The most common questions concern clearance, packaging and diagonal measurements. Use the largest item box, measure actual clear openings and do not treat a zero-clearance result as safe.
Is the doorway diagonal enough?
No. The rotated rectangle must fit both the width and height at the same time.
Should I measure the item or the box?
Measure the largest box that will actually be carried. Packaging is often larger than the product.
How much clearance should I allow?
Usually at least 1–3 cm per side, with more for heavy items, wrapping and corner protectors.