The 30-second answer for parties, weddings and job sites.
100 guests for 4 hours = 400 guest-hours = 2 units.
Add 1 unit for every 5 on the chart — at least 1.
At least 5% accessible units per cluster, never fewer than 1 (2010 ADA Standards 213.2).
OSHA: 1 toilet for up to 20 workers. We suggest 1 unit per 10 with weekly service.
Landon Portable Toilets Rental · St. Peters, MO · Mon–Sat 7–7