How Many Porta Potties for Construction Crew
Crew size and shift length are the two numbers that determine unit count on a job site. Here’s how to land on the right number before booking.
The Standard Crew Ratio
One unit per 10 workers on a standard 8 hour shift is the general guideline used across most Philadelphia job sites.
Where does the one unit per 10 workers guideline come from?
It reflects general workplace sanitation practice for a standard shift length, giving crews reasonable access without long waits during breaks.
Adjusting for Shift Length
Crews working longer than 8 hours, or running split shifts, put more cumulative use on each unit throughout the day, which can justify an additional unit.
Does a 10 hour shift need more units than an 8 hour shift with the same crew size?
Yes, the longer the shift, the more total usage each unit sees, so a longer shift day sometimes calls for an extra unit even with the same crew size.
At what crew size does it make sense to add a second unit?
Once a crew grows past around 10 workers, a second unit starts to make sense, both for the ratio itself and to reduce walking time across a larger site.
Does following the standard ratio meet OSHA requirements automatically?
For most typical crew sizes and shift lengths, yes. Very large or unusual site configurations should confirm specifics directly with current OSHA guidance.
Should unit count be locked in at the start of the project or adjusted later?
Starting with an estimate based on early crew size and adjusting as the project grows works better than locking in one fixed number for the entire job.
Small Crews vs. Large Crews
A crew under 5 people can typically share one unit without issue. Crews over 15 often benefit from splitting placement across the site rather than relying on one central unit.
OSHA Sanitation Guidance
Federal workplace rules require sanitary facilities on job sites where employees work for extended periods. The standard crew ratio generally satisfies this baseline requirement.
Adjusting Mid Project as Crew Size Changes
Construction projects often start with a smaller crew and grow through different phases. Unit count can be adjusted up or down as the crew size changes over the life of the project.
Frequently Asked Questions
Request a free quote and get a unit count recommendation based on your crew size and shift length.
