ADA Porta Potty Requirements for Brooklyn Events
Read what the 2010 ADA Standards say about clustered units, then count how many accessible units each group needs and how guests reach them.
Planning a street fair on Knickerbocker Avenue or a festival in a Queens park, the ADA question usually arrives late, from a permit reviewer or a vendor. Brooklyn Porta Johns put this guide together for event organizers renting portable toilets in Brooklyn and nearby boroughs, so the answer is ready before anyone asks.
Where porta potties stand together in a group, at least 5 percent of each group has to be an accessible unit. Because the ADA Standards round any fraction up to the next whole unit, that means one accessible unit in every group of up to 20, two in a group of 21 to 40, and so on.
The unit is half the job. A guest in a wheelchair also has to be able to reach it, across a surface that holds a wheel and without a curb or cable in the way.
What the 2010 ADA Standards say, word for word
"Where multiple single user portable toilet or bathing units are clustered at a single location, no more than 5 percent of the toilet units and bathing units at each cluster shall be required to comply with 603. Portable toilet units and bathing units complying with 603 shall be identified by the International Symbol of Accessibility complying with 703.7.2.1."
Why "no more than" still means "at least"
The wording reads backwards because it is an exception. The main rule in 213.2 says every toilet room provided has to comply with section 603. Exception 3 relaxes that for clustered portable units: instead of all of them, the requirement stops at 5 percent. The U.S. Access Board's guide to the Standards states it the other way round: "access is required to at least 5% in each cluster," and it adds "including at temporary events."
What counts as a cluster
The Standards' advisory note describes a cluster as a group "proximate to one another," generally "within sight of, or adjacent to, one another." A row of units by the stage is one cluster. A second row at the far end of the fair is another, and it needs its own accessible unit.
How many accessible units each cluster needs
Section 104.2 of the Standards settles the rounding: where a percentage leaves a fraction, "the next greater whole number" is provided. So a cluster never drops to zero accessible units just because 5 percent of it is less than one.
Splitting the order changes the count. Twelve units in one row need one accessible unit. The same twelve split into two rows of six need two, one per row. Decide your layout before you finalize the order; the porta potty calculator gives the total to split.
One unit standing alone is not a cluster, so Exception 3 doesn't cover it. The plain reading falls back on the main rule, which has each toilet room comply. For a public event with a single unit, plan on that unit being the accessible one.
| Units in the cluster | 5 percent | Accessible units |
|---|---|---|
| 4 | 0.2 | 1 |
| 10 | 0.5 | 1 |
| 20 | 1.0 | 1 |
| 21 | 1.05 | 2 |
| 40 | 2.0 | 2 |
| 41 | 2.05 | 3 |
| 60 | 3.0 | 3 |
An accessible unit at the end of a curb is not accessible
The Access Board guide is direct about it: "An accessible route and entrance are required to serve portable units." On a Brooklyn street event, the route is where plans fail.
Width
Walking surfaces on an accessible route need a clear width of 36 inches minimum (403.5.1). Queues, vendor tents and generator cables all eat into it.
Slope
Running slope no steeper than 1:20 and cross slope no steeper than 1:48 (403.3). Streets are built with a crown so rain runs to the gutter, which means a unit set in the parking lane can sit on a tilt.
Surface
Ground surfaces must be "stable, firm, and slip resistant" (302.1). Wet grass in a park lawn and loose gravel fail; plywood or mats over them can work if they lie flat.
Level changes
Anything over half an inch has to be ramped (303.4). That includes the curb between sidewalk and roadway, cable covers and the lip of the unit's own floor.
If the units go in the roadway for a block party, put the accessible one next to a corner curb ramp, or ask the rental company whether it supplies a portable ramp that meets section 405. The permits and placement guide covers what the city allows in the street.
What makes the unit itself compliant
Section 603 is the toilet room chapter, and the Access Board guide says portable units "must meet all requirements for toilet rooms that apply, including fixture clearances, turning space, and door maneuvering clearances." Turning space is a circle 60 inches across, or a T-shaped space fitted inside a 60-inch square (304.3), which is why accessible units are so much wider than standard ones.
You won't measure grab bars on delivery day. What you can do is ask the rental company, in writing, whether the model on the quote is built to the 2010 Standards, and check that each accessible unit carries the International Symbol of Accessibility on the door. ADA accessible porta potty rental covers the models and what to ask for.
Put the accessible unit on the flattest, firmest spot in the cluster, facing the route, with nothing parked or stacked in front of the door.
Construction sites sit outside the rule
Section 203.2 of the Standards says "portable toilet units provided for use exclusively by construction personnel on a construction site shall not be required to comply with 213 or to be on an accessible route." The Access Board guide calls those units "fully exempt."
The key word is exclusively. A jobsite unit that also serves a sales office, a community open house or a public plaza during construction no longer fits that description. For the OSHA count on a working site, see the New York portable toilet regulations.
ADA porta potty questions
Does a private backyard party need an ADA porta potty?
The Access Board guide applies the 5 percent rule to portable units at events covered by the Standards, and a party at a private home is a different case. If you are unsure whether your event is covered, ask the permit office or your counsel. If a guest uses a wheelchair or walker, rent the accessible unit anyway, since the rule only sets a minimum.
Can a restroom trailer with a ramp count as the accessible unit?
Only if the trailer has a room that meets section 603 and the ramp meets the ramp rules in section 405. Check whether the trailer comes with steps or a ramp, then ask the rental company for a trailer model sold as ADA compliant, and ask to see the floor plan.
Where should the accessible unit go in a row?
At the end nearest the accessible route, so a wheelchair user does not have to pass the whole line on uneven ground. Keep the door side clear of the next unit and of any hand sink so the door can open fully.
Does a construction site ever need an accessible unit?
The 2010 Standards exempt units that only construction workers use on a construction site. A site office where clients, inspectors or the public use the toilet is outside that wording, so ask your safety lead or permit consultant how to treat it.
Sketch the clusters before you order
Mark where each group of units will stand and how guests get there from the street. With that sketch, the rental company can count the accessible units per group and quote the right models.