Will a book shelf (99x30x3 cm) fit through an 81 cm door?
Expert analysis
A book shelf measuring 39 in × 12 in × 1 in fits through a door, with about 2 ft 5.5 in to spare at the tightest point. The binding dimension is width: in its best-fitting orientation, the width is what comes closest to the limit, and it still clears. We checked every orientation and confirmed at least one places the book shelf fully inside without compression or disassembly. That margin already subtracts a 1.5 in handling allowance, so it reflects a realistic load rather than a paper-thin theoretical fit. One caveat: applied practical clearance for handling (see tolerance buffer above).