Entrances & Doors

The first and biggest decision about an entrance is not its hardware but its dignity: is the main way in usable by everyone, or is access shunted to a lesser side door? The principle in every modern access framework - India's RPwD Harmonised Guidelines, the ADA, Approved Document M, ISO 21542 - is the same: the principal entrance should be accessible, and where it genuinely cannot be, the alternative must be as equivalent, direct and dignified as possible, not a grudging back route.

Step-free is the non-negotiable core of this. A single step at the entrance - the most common access failure in existing buildings - stops wheelchair users, threatens people with unsteady balance, and trips people carrying things. Designed from the start, a level entrance costs essentially nothing more than a stepped one: it is the same door, set at the same level as the approach, with the internal floor brought to meet it. The expensive, awkward version is the retrofit - the bolt-on ramp, the platform lift, the portable board - which is exactly what designing level from the first section avoids.

Where levels genuinely cannot meet - a heritage plinth, a flood-defence threshold - the answer is a properly designed ramp integrated into the entrance (Lesson 2.3), or a lift, not a step with an apology. And the accessible entrance must be findable and usable on the same terms as any other: on the main route, obvious from the approach, open during the same hours, unlocked, not dependent on ringing a bell and waiting for someone to come. An entrance you must ask permission to use is not an equal entrance.

> Do not design an accessible entrance. Design an entrance that happens to be accessible - the main one, level, generous, and open to all on the same terms.

Ask how wide a door is and most people name the size of the leaf or the frame. Neither is what matters for access. What matters is the effective clear width - the actual unobstructed opening a person passes through when the door is open, measured at the narrowest point, from the face of the open leaf across to the door stop or frame on the far side. An open door eats into its own opening: the thickness of the leaf, and any door furniture, all reduce the gap you can actually get a wheelchair through.

This catches people out constantly. A frame that looks generous can deliver a clear width well below the leaf size once the door is open to ninety degrees, and a wheelchair - which needs room for the chair, the hands on the rims, and a margin for error - can be stopped by a doorway that on paper looked fine. The clear width you should design to is the guidance figure for your building type in your code (a commonly cited minimum effective clear width for a single accessible door is on the order of 800 to 900 mm, but this varies and must be verified locally). Design to the effective clear width, not the leaf dimension, and check it at the narrowest real point.

Width is not only about the door. It is about the whole pinch point: the door plus its frame, plus anything projecting near it, plus the corridor it opens into. A door at the correct clear width that opens straight into a narrow cross-corridor, or beside a projecting radiator, can still be impassable. And double doors deserve care - if a person can only rely on one leaf being opened, that single leaf must itself deliver the clear width, or both leaves must open together easily. Always design the doorway as a three-dimensional passage a body moves through, not a two-dimensional gap on a plan.

Getting through a doorway is not only about width; it is about the physical act of operating the door, which is where a huge share of real-world door failures live. Three things decide whether a person can actually open a door: the force needed, the space to manoeuvre while doing it, and the hardware they grip.

Force is the quiet exclusion. A door with a strong self-closer, or a heavy leaf, or a stiff seal, can demand a push or pull that a child, an older person, someone using one arm, or a person seated in a wheelchair simply cannot deliver - especially while also trying to move through the opening and not be hit by the closing door. Fire doors, which need closers for safety, are a particular tension here, resolved by devices such as held-open closers on detectors, or power assistance. The principle: opening force should be as low as is compatible with the door's function, and a door that fights the person is a barrier. Confirm the maximum opening-force figures in your local code.

Space is the part designers forget. To open a hinged door you need room to stand or sit beside the latch and swing the leaf without being pushed backwards - the manoeuvring space or door clearance. On the pull side especially, a wheelchair user needs clear floor space alongside the latch to reach the handle, pull the door past themselves, and then pass through. A door jammed into a corner, or with a wall hard against the latch side, can be correctly sized and still unusable because there is nowhere to sit while opening it. Design the door and its clear floor space together.

Hardware finishes the job. Lever handles, D-pulls and push plates can be operated with a closed fist, an elbow or a forearm; round knobs, which demand a firm grip and a twisting wrist, exclude many people and should be avoided on accessible doors. Handles at a consistent, reachable height, latches that release easily, and pulls on the closing side of the door all matter. The whole assembly - force, space and hardware - has to let a person open the door with the strength, reach and dexterity they actually have.

Three finishing details separate a door that works from a door that merely opens. First, the threshold - the sill where the door meets the floor. A raised threshold is a trip hazard and a wheel-stopper; the goal is a level or flush threshold, and where an upstand is unavoidable (for weather or water), it should be as low as possible and chamfered so a wheel can ride over it. Weather sealing and level access are not enemies - purpose-made low-profile threshold seals resolve them - but a fat aluminium sill left proud of the floor is one of the most common small barriers in otherwise good buildings.

Second, the vision panel - the glazed pane in a door. Its job is safety and social: it lets people on either side see each other, so the door is not swung into someone's face and so a person approaching is seen. For that to work for a wheelchair user or a child, the glazed zone must extend low enough that a seated person is visible through it - a pane that only starts at standing eye level makes a seated person invisible. A commonly cited approach is a vision panel with a viewing zone reaching down to around the height of a seated person's eyeline; verify the specific zone in your code. Solid doors on busy circulation routes without any vision panel are a collision risk for everyone.

Third, automatic and power-assisted doors - the most inclusive option where they suit the building. An automatic sliding or swing door removes force and much of the manoeuvring problem at once, and serves wheelchair users, people carrying loads, parents with prams and everyone else. They need care: adequate opening time, safety sensors so they do not close on a slow-moving person, and a manual fallback for power failure. Revolving doors are the counter-example - they exclude wheelchair users, guide-dog users, people with prams and many others, and where one is used there must always be a conventional accessible door immediately beside it, on the same route, equally usable. Get the threshold flush, the pane low, the operation easy, and the entrance finally does what an entrance is for: it lets people in, all of them, without a second thought.