OSHA 1926.51: 110 workers, how many toilets and urinals?
OSHA 1926.51(c) requires one toilet and one urinal for every 40 workers on a construction site with 110 employees. For 110 workers, you need three toilets and three urinals to comply. The standard is clear: 20 to 199 workers need one toilet seat and one urinal per 40 workers. Round up to the next whole number, so 110 ÷ 40 = 2.75, meaning three of each. Mobile crews with immediate access to off-site facilities are exempt, but if your crew is on-site all day, you must provide these units.
Unit types and placement: Use standard portable toilets for the base count. Add an ADA-compliant portable toilet if you cluster units, as the ADA 5 percent cluster rule applies. Place them on level ground with truck access for weekly service. For long-term sites, consider a restroom trailer if you have power and water hookups, but it still counts toward the toilet count.
Service and compliance: Schedule weekly service visits for pumping and cleaning. In heat or heavy use, increase frequency. Use staking and tie-downs to secure units against wind. Document your setup and service logs to avoid fines during inspections.
Post your site specifics, crew count, duration, ground conditions, for more tailored advice.