Why there is no standard bed count
Field hospitals are modular by doctrine. The same shelter components can be configured as a 10-bed forward post, a 50-bed surgical facility, or a 200-bed infectious disease annex, because the bed count follows the mission's casualty estimate and referral role — not the tent catalogue. Military medical systems formalise this with echelons of care, and civilian disaster response does it with the WHO Emergency Medical Team (EMT) classification. Any supplier quoting 'our field hospital has X beds' without stating the configuration and staffing behind it is quoting a catalogue page, not a capability.
The WHO EMT ladder
The WHO classification gives the scale its public anchor points. Type 1 delivers outpatient emergency care — daytime consultations, no inpatient beds. Type 2 adds inpatient surgical emergency care: at least 20 inpatient beds, an operating table, and the staffing to run them around the clock. Type 3 is referral-level: at least 40 inpatient beds with at least two operating tables in separate rooms, plus 4 to 6 intensive care beds with ventilation capability, and it is expected to deploy for at least two months. These are minimums for classification, not maximums — a large Type 3 facility can run well beyond 40 beds when staffing and structure allow.
What actually limits the bed count
Beds are cheap; everything around the bed is the constraint. WHO minimum standards require at least one metre between beds in a Type 2 facility and 2.5-metre spacing in ICU areas, so floor area per bed is far larger than the bed itself once circulation, equipment and infection-control separation are counted. Nursing ratios bind harder than floor space: the standards call for continuous staffing ratios per bed, maintained 24 hours, which means bed count is really a staffing decision. Add triage at the front, operating and sterilisation in the middle, water, sanitation and power throughout — the ward beds are the last thing added, not the first.
How the shelter maps to the beds
In practice, capacity is built by connecting shelter units: triage at the entry, wards behind it, operating and isolation as separate linked modules, with corridors that keep clean and contaminated flows apart. Inflatable construction earns its place here because large covered volumes rise quickly and modules can be added as the mission scales — an inflatable medical tent becomes a hospital by aggregation, not by size of one shell. Frame structures suit very long deployments and extreme spans; existing buildings beat both when they survive, which is why WHO standards explicitly allow teams to work inside host facilities. Our own position on the numbers: we publish no capacity, span or deployment figures without documented data — when the files exist, the numbers go up.