Consider Sight Lines In Public Restroom Design For Maximum Stall Use

September 9, 2013

When working on a public restroom design, especially a women’s public restroom, position the entrances in a way that allows those waiting in line to see all available stalls. This allows customers to determine as quickly as possible which stalls are available and which are occupied. Consider placing sinks and restroom hand dryers in an area separate from the stalls. This will move traffic away from the stalls and hopefully reduce crowding, especially in busy bathrooms.

Depending on the size of the workplace or public building, restroom requirements differ. At smaller facilities, one restroom is sufficient for both sexes if the bathroom is designed for individual use. Larger workplaces require a certain number of bathroom stalls installed based on the amount of people working at any time. The Code of Federal Regulations states that three bathroom stalls must be installed for less than 50 employees, and six installed for 150 employees. For every 40 employees over 150, an additional bathroom stall needs to be available, according to the CFR. Sinks must be kept in sanitary condition and provide warm water and hand soap. For hand drying, paper towel dispensers or air blowers must be kept in working order.

Compare the number of employees to the OSHA chart for number of required restrooms

1 to15 employees: 1 restroom
16 to 35 employees: 2 restrooms
36 to 55 employees: 3 restrooms
56 to 80 employees: 4 restrooms
81 to 110 employees: 5 restrooms
111 to 150 employees: 6 restrooms

Plumbing Requirements

There should be toilet stalls and lavatories for both sexes on each floor with at least 1 male and female stalls on each floor. Privacy screening is required at the entrance to the restroom and within the restroom when there are multiple fixtures.There should be drinking fountain on each floor. If there is more than 1 floor, each floor should have its own. Common location is the corridor outside the rest room area. If only one is used, then it must be a hi-low fountain.

Minimum number of plumbing facilities
Assembly concentrated use:
Male stalls – 1 per 125
Female stalls – 1 per 65
Lavatories – 1 per 200
Drinking Fountains – 1 per 500

Assembly less concentrated:
Male stalls – 1 per 75
Female stalls – 1 per 75
Lavatories – 1 per 200
Drinking Fountains 1 per 500

Male stalls – 1 per 50
Female stalls – 1 per 50
Lavatories – 1 per 80
Drinking Fountains – 1 per 100