Measures · Number of toilets
Minimum number of toilets FREE
Work out how many toilets you need by type of premises. Below the result you find the formula and the standard.
Indicative pre-sizing. It does not replace a structural calculation signed by a licensed engineer. For seismic zones with agS (design ground acceleration) > 0.15g, long spans or use classes III/IV → talk to a structural engineer.
Pick a calculation from the list to start.
Formula, example and standard
1 per 10 employees · separate above 10
Example with the starting values (Room type: Office; Employees or m²: 10): 1 WC. Accessible WC min 1.80×1.80 m (DPR 503/96).
- Offices: D.Lgs. 81/08 (the Italian workplace safety law) + municipal rules.
- Bars and restaurants: specific regional / ASL (local health authority) rules.
- Accessibility: at least 1 adaptable/accessible WC (DPR 503/96 / DM 236/89).
Source: DM 236/89 · DPR 503/96 · D.Lgs. 81/08 · qamarero.com
Indicative pre-sizing: it does not replace a calculation signed by a licensed engineer.
The other calculations
Timber beamSteel IPE beamReinforced concrete beamReinforced concrete columnSteel columnTimber columnRC cantilever / balconyLintelClay block and concrete slabTimber floorPredalles slabLoad-bearing brick wallPartition wallStaircaseMinimum room heightWindow-to-floor ratioEscape route widthNTC imposed loadsExternal insulationVentilated crawl spaceRoof pitch