How many porta potties do I need for a construction site?
Start with the crew count on your busiest shift. OSHA 1926.51(c) gives the bracket table: 1 toilet seat for 20 workers or fewer, 1 toilet seat and 1 urinal per 40 workers once you pass 20, and 1 toilet seat and 1 urinal per 50 workers at 200 or more. A 15-person framing crew needs one standard portable toilet rental. A 45-person job crosses into the next bracket and needs two units plus a urinal setup. Redmond general contractors juggling multiple trades often round up rather than sit exactly on the line, since a broken unit mid-week with no backup stalls the whole crew. If your site is spread across a large lot, don't cluster every unit at the trailer; ANSI/PSAI Z4.3 treats one unit per 10 users over a 40-hour week as the servicing baseline, and spacing them near actual work zones cuts walk time. Larger sites also need water: OSHA 1926.51(a)(1) requires an adequate supply of potable water at every place of employment, which is why a lot of Redmond crews pair toilets with a handwashing station rental rather than relying on sanitizer alone. For full guidance built around this exact table, see OSHA portable toilet requirements and the broader construction site services page.
How many porta potties do I need for an event?
Use guest count and hours together, not headcount alone. A 4-hour event with no alcohol runs lighter than an 8-hour festival pouring beer, because bathroom visits per person climb with both time and drink service. Here's a rough planning table by headcount and duration:
| guests | 4 hours | 8 hours | add for alcohol |
|---|---|---|---|
| 100 | 2 units | 3 units | +1 unit |
| 250 | 4 units | 6 units | +2 units |
| 500 | 8 units | 11 units | +3 units |
These are planning ranges, not code minimums; there's no OSHA table for public events, so it comes down to guest comfort and line length. A wedding for 150 in Redmond typically wants at least one deluxe flushable porta potty alongside standard units, and ADA Standards section 213.2 requires at least one accessible unit whenever units are clustered, even at small events. Multi-day festivals need a servicing plan, not just more units. Browse event restroom rental, wedding restroom rental, or festival restroom rental for setups scaled to your date.
Does alcohol change how many units I need?
Yes. Alcohol service increases bathroom trips and slows turnover at each stall, so add roughly 20 to 30 percent more units than a dry event of the same size. A 250-guest beer garden that would need 4 units dry should plan closer to 6. Concerts and golf tournaments in Redmond that serve alcohol all evening should also add a hand sanitizer station rental near the bar line, since that's where congestion builds fastest. If the event runs past dark, OSHA 1926.56(a) sets illumination minimums for work areas, and while that standard targets jobsites, the same logic applies to any restroom bank guests need to find safely after sunset. Multi-day events compound this: a 3-day festival doesn't just triple the daily count, because servicing frequency and holding tank capacity both become limiting factors. Check concert restroom rental or golf tournament restrooms for setups already built around extended pours.
What size dumpster do I need alongside my restrooms?
Most Redmond renovation and construction jobs pair a restroom order with a roll-off. A 10 yard dumpster runs about 12 feet long and holds roughly 1,296 cubic feet, right for a single room remodel. A 20 yard dumpster runs about 22 feet and holds close to 2,592 cubic feet, handling 2 to 3 tons of mixed debris on a typical tear-out. A 30 yard holds up to about 4 tons and suits a full roof or siding job, while a 40 yard climbs to about 5 tons for large-scale demolition. Here's the comparison:
| size | length | tons | best for |
|---|---|---|---|
| 10 yard | 12 ft | up to 1.5 tons | small cleanout |
| 20 yard | 22 ft | 2 to 3 tons | remodel debris |
| 30 yard | 22 ft | up to 4 tons | roofing, siding |
| 40 yard | 22 ft | up to 5 tons | major demolition |
A roll-off delivery needs about 60 feet of straight clearance behind the truck, so confirm your driveway or street frontage before booking. Compare exact dimensions on dumpster sizes and dimensions or start with roll-off dumpster rental, and check what cannot go in a dumpster before you load anything.
Do I need an ADA-accessible unit?
If you're clustering portable toilets for a public event or a jobsite, ADA Standards section 213.2 requires at least 5 percent of the cluster be accessible, and never fewer than one unit even for small clusters. That accessible unit needs a 60 inch turning circle under section 304.3.1, a clear door opening of at least 32 inches per section 404.2.3, and an approach route at least 36 inches wide under section 403.5.1. Ramp slope, where one is used, can't exceed 1:12 per section 405.2. A county fair or marathon route through Redmond with several hundred attendees needs more than one accessible unit spaced along the route, not just one at the entrance. See ADA accessible porta potty and the fuller breakdown at ADA restroom requirements before finalizing your layout.
Worked example: 50-person job site in Redmond
Fifty workers on a 40-hour week crosses the first OSHA 1926.51(c) bracket at 20, so this crew needs 1 toilet seat and 1 urinal per 40 workers, meaning two full setups to stay compliant with room for absentees. Add a handwashing station since potable water is required under 1926.51(a)(1), and if the crew is applying paint or coatings on this job, OSHA 1926.51(f)(1) kicks in specifically for that work and requires washing facilities beyond a sanitizer stand. Redmond sits close enough to draw from crews working in Union Hill-Novelty Hill, 6.4 miles east, or Woodinville, 7.1 miles north, so a single delivery route often covers more than one active site in a week. A standard unit rented for a full month falls in a fairly wide range depending on service frequency; check current numbers on monthly porta potty rental or the general porta potty rental cost page before budgeting the job.
Worked example: 300-guest outdoor wedding
Three hundred guests over a 6-hour reception with a bar sits between the 250 and 500 rows on the event table above, so plan for roughly 5 standard units plus 2 additional for alcohol, plus one accessible unit under ADA Standards 213.2. A wedding this size often adds one deluxe flushable porta potty near the reception tent so guests aren't walking past the work units. If the venue sits near Redmond city limits, confirm placement with the property owner first; the porta potty placement guide covers ground stability and clearance needs, since ADA Standards section 302.1 requires the surface under and around each unit be stable, firm and slip resistant. Daily and weekend pricing for a run of this size varies with unit mix, and it's worth comparing porta potty rental per day against a flat weekend rate before you commit.
How many porta potties do I need for 100 people?
For a single day under 8 hours with no alcohol, plan on 2 standard units. Add a third if the event serves alcohol or runs past 6 hours. This matches the event table above and gives buffer against line buildup during peak arrival times.
How many tons does a 30 yard dumpster hold?
A 30 yard dumpster holds up to about 4 tons of debris, depending on what's loaded. Dense material like shingles or concrete fills the weight limit long before the box looks full, so check dumpster weight limits before loading heavy debris.
How many cubic feet in a 20 yard dumpster?
A 20 yard dumpster holds close to 2,592 cubic feet and runs about 22 feet long. It's the most common size for a kitchen or bathroom remodel generating mixed wood, drywall and flooring debris.
Is one porta potty enough for a small backyard project?
For a short home renovation with 1 or 2 workers, a single standard unit usually covers it under OSHA 1926.51(c)'s 20-or-fewer bracket. See home renovation porta potty for setups sized to smaller residential jobs.
Do I need more units for a multi-day festival?
Yes, but not simply more per day; servicing frequency matters more than raw unit count once you're past a single day. A 3-day event needs a mid-event pump-out scheduled in advance, which festival restroom rental can help plan around holding tank capacity.
How many feet is a 10 yard dumpster?
A 10 yard dumpster runs about 12 feet long, making it easier to fit on tighter Redmond driveways than the 22-foot boxes used for 20, 30 and 40 yard sizes.
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