What's the OSHA rule for porta potties on a bridge project?
OSHA 1926.51(c) requires one toilet and one urinal per 40 workers for a crew of 45 on a construction site. Your bridge project needs two units. The standard applies because your crew has no nearby facilities and transportation is not readily available.
Placement and unit types
Place the units on level ground near the work area. Use staking and tie-downs to secure them against wind. For a crew of 45, I order two standard portable toilets. Add an ADA-compliant portable toilet if you have workers with disabilities or to meet the ADA cluster rule for future clusters.
Service and access
Schedule weekly service visits for pumping and cleaning. Confirm truck access to the units on the bridge or nearby stable ground. Blocked access results in missed service and extra charges.
Post your setup details if you need help with unit types or placement.