The 90° Hallway Corner Problem
Moving a large sofa or appliance around a 90-degree hallway
corner is one of the most common moving challenges. As the item rotates, its depth simultaneously
occupies space in both corridors.
ClearanceCalc uses a geometric bound based on the moving sofa problem
to calculate the maximum safe length for any corner configuration.
Frequently Asked Questions
Can a couch fit through a 30-inch door?
Yes, many standard couches can fit through a 30-inch doorway by removing the cushions,
unscrewing the feet, or angling the sofa through the frame in a sharp "V" rotation pattern.
How do you measure a sofa to see if it will
fit?
Measure the absolute maximum length, total depth, and back height. Compare these metrics
directly against your narrowest door frame widths and internal hallway clearance turning
points.