Week 5: Doors that pass and doors that work

Why a door can look fine at eye level and still fail the person trying to get through it

22 March 2027

Most doors are designed, tested and approved by people who can see the sign, reach the handle, push the weight, and clear the threshold without noticing any of it as an achievement. An accessibility review exists because that experience isn’t universal, and a door that clears every check a sighted, mobile, unhurried reviewer would think to run can still fail someone else completely.

The recurring failures aren’t exotic: a door heavier than it needs to be, a clear opening narrower than a wheelchair or a pram, an automatic opener timed for someone who walks faster than you do, a threshold lip that’s invisible until a wheel catches on it. None of these show up in a glance. All of them show up the moment you ask “who is this door built for by default, and who wasn’t in the room when that default was set.”

Outline#

• why “looks fine” and “passes a real accessibility review” are different claims
• the recurring failure modes: weight, clearance, timing, threshold
• what a redesign proposal has to show to survive this lens
• how this pairs with next lecture’s question about what hardware is honestly telling you