How to build your ED — physical design, zones and layout
Most Indian EDs are inherited rooms, not designed departments — a hall near the gate with beds pushed to the walls. This chapter is the working drawing: how patient flow decides the floor plan, how to size and zone the department, what a true resuscitation bay contains, the engineering hidden under the walls, and the short list you never cut even in a 4-bed casualty. Written for the clinician asked to plan, renovate or audit an ED — not for an architect.
On this page01 · First principles — patient flow decides the floor plan
- 01 · First principles — patient flow decides the floor plan
- 02 · Site and the front door
- 03 · The zoning map — acuity zones plus the support ring
- 04 · Anatomy of a true resuscitation bay
- 05 · Cubicles, sight-lines and the nursing station
- 06 · The engineering under the walls — gas, power, air, light, fire
- 07 · Four sizes of Indian ED — what scales and what you never cut
- 08 · Designed-in safety — violence, mental health, MLC and the last journey
- 09 · Design for the worst day — surge, MCI and the commissioning walk-through
- Key takeaways
- References
- See also
First principles — patient flow decides the floor plan
Do not start with rooms; start with the journey. Every metre a sick patient travels, and every wall the staff walk around, was decided the day the plan was drawn.
Bedside key actions
Trace the journey on paper first: arrival → triage → resus / majors / fast-track → imaging → observation → exit (admission, transfer, discharge or mortuary). Wherever the pencil doubles back or two streams cross, patients will queue and staff will walk extra kilometres every shift. The floor plan is your triage system poured in concrete.
Planning defaults: roughly one treatment space per 1,100 annual attendances (ACEM design guidance) — so 22,000 patients a year needs about 20 trolley spaces, not 8. At hospital level, ED beds around 5-10% of total hospital beds is the IPHS-style planning band. Count trolley spaces, not waiting chairs.
The resus zone sits beside the ambulance entrance and in full view of the nursing station; fast-track sits by the walk-in door so minor cases never travel through the resus corridor. Acuity decides geography — the patient least able to travel travels the least.
Every cubicle identical: oxygen on the same side, suction in the same spot, the same drawer holding the same kit. A nurse pulled to bay 7 at 3 am finds adrenaline exactly where it lived in bay 2. Standardisation is a design decision, and it is free.
Most readers inherit a hall and cannot move walls. The order of spending: triage desk at the door → oxygen and suction to every bed → one true resus bay → sight-lines (glass, not brick) → an isolation-capable single room. Everything else waits.
Site and the front door
An ED is a ground-floor, drive-through organ. If the ambulance must reverse, the gate is shared with OPD, or the trolley ride exceeds 20 metres, the front door is failing before any medicine starts.
Bedside key actions
The ED lives on the ground floor with level or ramped access — never up a lift. Lifts fail, power fails, and a stretcher on stairs is a resuscitation interrupted. If the site forces a level change, a dedicated hospital-bed-sized lift with generator backup is the minimum, and it is still second best.
Covered against monsoon and summer, lit at night, and drive-through so no vehicle ever reverses across pedestrians. 108 / 102 and private cars both drop here; check height clearance for ambulance vans. Keep a stretcher-exchange spot and an oxygen cylinder at the bay itself.
Park the trolley and wheelchair pool AT the gate with a porter or guard responsible for meeting arrivals. Nobody should carry a collapsed relative in their arms across a lobby, and a crashing patient is never wheeled the last stretch unattended — someone walks out to meet them.
Organophosphate spray, aluminium phosphide (Celphos) exposure and chemical spills arrive contaminated. Build an outside decontamination point — a tap, a floor drain, a privacy screen, gloves and aprons — so the patient is undressed and washed BEFORE entering the department. In a small unit, a curtained corner of the ambulance bay does the job.
A lit 'EMERGENCY / Aapatkaal' board readable from the road, in the local language plus Hindi/English and a pictogram; inside, one coloured line on the floor from the gate to the triage desk. Test all of it at night — that is when it is needed.
The zoning map — acuity zones plus the support ring
Zone the clinical core by acuity and wrap the support spaces around it. The nursing station is the hub, with an unbroken line of sight into every monitored bed.
Bedside key actions
The triage desk must see the door AND be seen from it, and it comes before registration or billing (the NABH expectation). Give it a vitals corner — BP, SpO2, thermometer, glucometer — and a weighing scale for children. A queue forming at triage is itself a red flag: it means triage is under-staffed or badly placed.
A 10-bed ED needs at least one true resuscitation bay; larger units plan roughly one resus space per 10-15 total ED beds. Resus sits nearest the ambulance entrance, is visible from the station, and is never used as an overflow trolley park — an occupied resus bay with a stable patient is a resus bay you do not have.
Fast-track lives by the walk-in entrance with its own consult room, a couple of couches and chairs. In most Indian EDs minors are 60-70% of the census; keeping them out of the trolley area is the single biggest de-crowding move a floor plan can make. This is the physical home of the streaming model in 'Triage in the corporate / private ED'.
At least one single room with a closing door, its own washroom if possible, and air exhausted outwards — negative pressure where budget allows. TB, measles, chickenpox and the next pandemic all arrive through your front door first. Larger builds add an anteroom for donning and doffing.
Six-to-24-hour short-stay beds decongest the acute trolleys: snake-bite watch, organophosphate observation, dengue fluids, chest-pain rule-outs. Plan roughly one observation bed per 2-3 acute trolleys, with its own nurse post and toilets. Without it, every observation case blocks an acute bay for a shift.
Around the clinical core: a lockable drug room with a temperature-logged fridge, clean utility, dirty utility with a sluice, general store, a point-of-care lab bench (ABG, glucose, ketones), and a plaster / procedure room. None of these opens into the resus bay, and none of them steals corridor space.
Anatomy of a true resuscitation bay
A resus bay is not a bed with a monitor — it is 360-degree access, a wall of gas and power, and every tool within one step. Build it once, correctly.
Bedside key actions
Around 35 square metres for a single bay is the ACEM-style planning default — room for the trolley, six staff, POCUS and a portable X-ray without moving anything. If renovating, sacrifice a neighbouring cubicle to make one proper resus bay rather than keeping two cramped ones.
Piped oxygen with manifold backup is the goal; two oxygen, one air and two suction outlets per resus bed so a ventilator and a chest drain can run simultaneously. No pipeline? Then TWO full cylinders per bed, each with its wrench tied on, and a written change-over drill.
Twelve to sixteen sockets per bay, on the essential circuit with generator changeover and a UPS bridge. Paint or label the UPS sockets red: the ventilator, monitor and syringe pumps plug in THERE, the mobile-phone chargers do not.
An airway station lives at the head end: two working laryngoscopes, all blade sizes, bougie, supraglottic airways, capnography. The drawer order mirrors the difficult-airway trolley exactly, so the failed-airway drill in 'Airway emergencies and the failed airway' maps onto the furniture.
Mark a spot where one relative can stand with a staff chaperone. Witnessed resuscitation is increasingly standard practice, and this same corner is where the BREAK conversation begins when the resuscitation ends — design the dignity in now.
Cubicles, sight-lines and the nursing station
Blind beds kill quietly. The station must see every monitored patient, and every cubicle must be the same cubicle.
Bedside key actions
Around 12 square metres per trolley space is the planning default, with curtain clearance for a trolley plus two staff. Each bay: oxygen, suction, four to six sockets, an examination light, and a nurse-call point. If the budget forces a choice, gases and sockets beat floor area.
A monitored patient behind a solid wall is an unmonitored patient — alarms get silenced, screens face away, and nobody sees the bradycardia trend. Glass above 1.2 metres, curtains instead of doors, and monitor screens angled towards the station.
The corner bed nobody can see is where the arrest is found late. If a bay cannot be seen from the station, do not put a monitored patient in it — make it the plaster room, the store, or the family room instead. Re-purposing a blind bay is cheaper than the incident report.
Stretcher doors need 1.2 metres clear; main corridors 2.4 metres so two trolleys pass without lifting wheels. Nothing is ever stored in a corridor — it is both a fire rule and a flow rule, and it is the first rule every ED breaks.
One computer for the whole floor throttles the department. Put a documentation point in each zone — resus, majors, fast-track, observation — so notes happen beside the patient, not in a queue. (The single-terminal bottleneck is the same lesson as the corporate-triage chapter's equipment ceiling.)
The engineering under the walls — gas, power, air, light, fire
The invisible services are the difference between a ward that looks like an ED and a department that still works at 3 am in a power cut.
Bedside key actions
The COVID lesson: the manifold or liquid-oxygen plant is sized for full occupancy on the worst day, not the average Tuesday. Keep cylinder backup for at least 24 hours of full use, a wrench tied to every cylinder, and a monthly line-pressure and change-over drill with the log to prove it.
Essential circuits change over to the generator automatically, within about 15 seconds as the planning default; the UPS bridges those seconds for ventilators, monitors and syringe pumps. Test the changeover monthly at a quiet hour, and log it — the first real test must not be the arrest at midnight.
The reference standard is negative pressure with at least 12 air changes per hour, exhausted through HEPA or safely above the roof line. The honest low-budget version — a dedicated exhaust fan pulling outwards, door kept closed, a curtained anteroom — is far better than nothing, but audit it with a smoke or tissue-paper test; assume nothing.
General lighting around 300 lux, an examination light near 1000 lux at every bay, dimmable lighting in observation (delirium prevention), and emergency lights on the exits. Elbow-operated scrub sinks in every zone plus an eyewash near decon. Floors are seamless washable vinyl with coved skirting; walls washable to two metres; no carpets, no clutter.
National Building Code Part 4 basics: two independent escape routes, fire-rated doors between compartments, extinguishers and hydrant points, and zero corridor storage. ED evacuation is horizontal — trolleys roll to the next fire compartment, not down stairs — so decide the compartment boundaries on the drawing and drill the staff on them.
Four sizes of Indian ED — what scales and what you never cut
The same anatomy scales from a 4-bed casualty to a 40-bed tertiary floor. Beds, staff and rooms scale; the never-cut list does not.
Bedside key actions
One resus-capable bay plus one to three observation trolleys. Decontamination is the outside tap and a curtain; isolation is the single side room with an exhaust fan. Because definitive care is elsewhere, the transfer wall matters most: 108 / 102 numbers, the referral hospital's ED phone, and a stocked transfer kit by the door — the physical half of 'Inter-facility transfer and handover'.
One to two resus bays, five to six monitored majors trolleys, two to three fast-track spaces and one isolation room — the floor plan under the single-doctor staffing model in 'Triage in the corporate / private ED'. The equipment ceiling caps the unstable census, so buy monitors and a second ventilator before buying more beds.
The IPHS 2022 district-hospital volume expects a dedicated emergency department with triage, resuscitation, observation beds, a minor procedure room and isolation — with ED beds in the 5-10% band of hospital beds as the planning default. If you work in this tier, the IPHS document is your funding lever: audit your ED against it and attach the gap list to the upgrade proposal.
Beyond about 25 beds a single station cannot see the floor; split into pods, each a mini-ED with its own station and support. Add what volume justifies: CT within or adjacent to the ED (stroke and trauma clocks), a separate paediatric bay with family space, a plaster room, an MLC / police desk and a teaching room off the floor.
Whatever the budget: triage at the door, one true resus bay, oxygen and suction at every bed, an isolation-capable single room, and no blind monitored beds. Cut floor area, cut finishes, cut the false ceiling and the lobby marble — never these five.
Designed-in safety — violence, mental health, MLC and the last journey
Violence against ED staff is a design problem before it is a security problem. Build the escape route, the safe room and the discreet exit into the plan.
Bedside key actions
The Indian ED reality is five attendants per patient. Manage the crowd at the gate, not at the bedside: a single public entry with a guard and an attendant-pass system (one pass per patient), staff-badge access to the clinical core, and a visitors' policy poster in the local language. Every extra unlocked door you leave in the plan is a future crowd-control failure.
Staff must never be trapped between the patient and the wall. Consult desks sit side-on to the door, and every room where staff meet strangers — triage, consult, counselling — has a second exit or pass-through. Duress buttons live under the triage desk and at the station; CCTV covers the entrance, triage and corridors.
Ligature-light: no rails, hooks, exposed pipes or cords; tamper-proof fittings; an outward-opening or double-swing door that cannot be barricaded; an observation panel; weighted soft furniture and nothing throwable. It sits near the station — never at the end of the corridor. This room is where 'Psychiatric medical clearance' physically happens.
Give police paperwork a desk away from resus, and plan so that an assault victim and the accused never share one corridor. The MLC register, injury-report writing point and police waiting spot cluster together near the entrance — the geography that backs up 'ED documentation and the medical record'.
A body-holding room with a discreet trolley route to the mortuary vehicle that never crosses the waiting family of the next patient. Dignity is a floor-plan decision, and it is decided now or never.
Design for the worst day — surge, MCI and the commissioning walk-through
The plan must flex for the bus crash and survive its own opening day. Walk the journey with a loaded trolley before the ribbon is cut.
Bedside key actions
In mass-casualty mode the zoning flips exactly as 'Mass casualty triage and disaster basics' describes: decide NOW which zone becomes red, yellow and green, paint discreet floor markers, and let the ambulance bay double as the triage and decontamination apron. An MCI plan that exists only on paper has no geography.
A few extra oxygen and power outlets in circulation space cost almost nothing at build time and are gold on the worst day — they turn a corridor into a temporary green zone without extension boards and cylinder relays. Routine storage there stays forbidden; surge use is the only exception.
Before opening, push a loaded trolley from the gate through triage, resus, CT and observation — and time it. Every door it bangs, every turn it cannot make, every threshold that jolts the 'spine' is a snag to fix while the builders are still on site. Repeat with a wheelchair and with a ventilated-transfer setup.
Run a mock arrest, a mock MCI, a violent-patient scenario and a fire drill in the new space with the real team before the first real patient. Half the design faults — the socket behind the trolley, the crash cart that does not fit through the curtain gap — appear in the first hour of simulation, at zero cost.
Visit the finished department at 2 am. Is the signage readable, the gate lit, the triage desk visible? Where do families actually sleep, and does that block a fire exit? Design for the department at its darkest hour — literally.
Key takeaways
- Flow decides the floor plan: trace door → triage → stream → exit on paper first; wherever the pencil doubles back, patients will queue.
- Size from your census, not the plot: about one treatment space per 1,100 annual attendances, and ED beds around 5-10% of hospital beds.
- Sickest nearest the door: resus beside the ambulance entrance, fast-track by the walk-in door — and the two streams never cross.
- Triage sits before billing, at a desk that can see the door; a queue forming at triage is itself a red flag.
- A true resus bay is 360-degree access, double gas outlets, red-labelled UPS sockets and everything one step away — about 35 square metres, built once, correctly.
- Standardise every cubicle — oxygen the same side, drawers in the same order — so any nurse works any bay without hunting.
- No blind monitored beds: if the station cannot see it, do not monitor a patient there — use glass, mirrors, or change the room's job.
- Size oxygen for the surge day, not the average day: 24 hours of cylinder backup, a wrench tied to every cylinder, and a monthly change-over drill.
- The never-cut list survives every budget: triage at the door, one true resus bay, oxygen and suction at every bed, an isolation-capable room, full sight-lines.
- Violence is a design problem: one controlled public door with an attendant-pass system, duress alarms, and two ways out of every room where staff meet strangers.
- Build the ligature-light safe room and the discreet body route now — dignity and safety are floor-plan decisions.
- Before opening, push a loaded trolley from gate to CT and run a mock arrest in the real space — the building's faults surface in the first hour, better before the first patient.
References
Freely citableEvery clinical claim in this chapter is backed by an independent, freely-accessible guideline. Tap any reference to open the source on the issuing body's site.
- ACEM design guidelinesGlobal
Australasian College for Emergency Medicine — Emergency Department Design Guidelines (G15)
Open source ↗
- NHS HBN 15-01UK
NHS England — Health Building Note 15-01: Adult and children's emergency departments, planning and design
Open source ↗
- IPHS 2022India
Ministry of Health and Family Welfare — Indian Public Health Standards (2022), District Hospital volume (emergency department norms)
Open source ↗
- NABH 5th edition (2024)India
National Accreditation Board for Hospitals and Healthcare Providers — Accreditation Standards for Hospitals, 5th edition (facility management, safety and emergency access)
Open source ↗
- NBC 2016 Part 4India
Bureau of Indian Standards — National Building Code of India 2016, Part 4: Fire and Life Safety
Open source ↗
- NDMA hospital safetyIndia
National Disaster Management Authority — Guidelines for Hospital Safety (structural, non-structural and surge preparedness)
Open source ↗
- WHO ventilation guidanceWHO
World Health Organization — Natural Ventilation for Infection Control in Health-Care Settings (isolation-room air-change standards)
Open source ↗
- WHO emergency care systemsWHO
World Health Organization — Emergency care systems framework (facility-level emergency unit organisation)
Open source ↗
See also
- Triage in the corporate / private EDThe staffing and streaming model this floor plan houses
- Triage in the Indian EDThe clinical triage standard the front door is built around
- Mass casualty triage and disaster basicsThe MCI mode the zoning map must flip into
- Infection prevention and control in the EDThe practice that lives inside the isolation room you build
- Quality indicatorsThe numbers that prove the built department actually works
Compiled from the design guidance listed above, calibrated to Indian ED practice from a nursing-home casualty to a tertiary floor. For clinicians planning, renovating or auditing a department; complements 'Triage in the corporate / private ED'. Not a substitute for statutory building, fire and licensing approvals.
Study with Dr Sumit
Like this chapter? There are 299 more.
Visual ED study chapters across resuscitation, trauma, cardiovascular, respiratory, neurology, toxicology, paediatrics and more — all built for working clinicians in Indian EDs and beyond. Plus calculators, decision rules, and clinical algorithms.
No clinical decisions should rest on a single source — always cross-check with local protocols. Educational use only.