Single Occ restrooms in lieu of multi

[Yikes]

I have an apartment complex with a community room for 97 occupants. There’s a possibility that outside/visiting groups may also use the community room.
My client is considered providing all single-occupancy restrooms in lieu of multi-user. Can I apply the fixture count as shown below per the California Plumbing Code?

Conventional multi user restrooms per CPC 422.1 for 48 females and 48 males:

Female restroom: 2 toilets, 1 lavatory, 1 diaper changing table; Male restroom: 1 toilet, 1 urinal, 1 lavatory, 1 diaper changing table
vs.
All unisex, all single occupancy restrooms:
Restroom 1: 1 toilet, 1 lavatory
Restroom 2: 1 toilet, 1 lavatory, 1 diaper changing table
Restroom 3: 1 toilet, 1 lavatory, 1 urinal

 

[arwat23]

I do all unisex single-user for most of my projects. Only one jurisdiction has ever questioned it before, and it'll explicitly be allowed in the 2025 CPC.

 

[Yikes]

I do all unisex single-user for most of my projects. Only one jurisdiction has ever questioned it before, and it'll explicitly be allowed in the 2025 CPC.

View attachment 16534

I guess my question has to do with proposing the actual number of fixtures, but they are in 3 bathrooms, not 4.

So in the multi-user restrooms per CPC configuration, 2 men and 2 women could be using toilets or urinals at one time.
In the single user version, only 3 people could use them at one time (because I’ve put a toilet+urinal in one single-user restroom.. Does that still meet code?

I really want it to, because California regs for requiring diaper changing tables make the multi-user, separate sex restrooms too big for the available space.

 

[Yankee Chronicler]

I guess my question has to do with proposing the actual number of fixtures, but they are in 3 bathrooms, not 4.

So in the multi-user restrooms per CPC configuration, 2 men and 2 women could be using toilets or urinals at one time.
In the single user version, only 3 people could use them at one time (because I’ve put a toilet+urinal in one single-user restroom.. Does that still meet code?

Obviously not.

Why put a urinal in a single-occupant toilet room? I've seen a lot of single-occupant toilet rooms, all around the world (not just in the U.S.). I can't recall ever seeing one with a water closet and a urinal.

 

[Yikes]

Obviously not.

Why put a urinal in a single-occupant toilet room? I've seen a lot of single-occupant toilet rooms, all around the world (not just in the U.S.). I can't recall ever seeing one with a water closet and a urinal.

California code allows a single occupancy restroom to have both a urinal and a WC, and it is not uncommon here.

 

[Mech]

Why put a urinal in a single-occupant toilet room? I've seen a lot of single-occupant toilet rooms, all around the world (not just in the U.S.). I can't recall ever seeing one with a water closet and a urinal.

Some possible reasons:

Th urinal is most likely using less water than the water closet.

With a urinal, users do not need to lift the toilet seat.

 

[Yikes]

To further explain my space constraints imposed by unique California regulations:
California has a Health and Safety Code 118506 that mandates installation of a baby diaper changing table in both men’s and women’s restrooms, or in a gender neutral restroom, that serves assembly and other public uses of 60 or more occupants.
This may not seem like a big deal if you are designing outside of California: hey just put a fold-down changing table in the huge accessible WC compartment.
But no, California also has 11B-226.4 which prohibits the table from being located in the accessible compartment in a multi-user facility.

Furthermore, many CASps will say that the table when folded down cannot obstruct required circulation clearances, and its ends must have a guard or other detectable warning for the visually impaired.
Now the changing table basically needs as much space as a sink, urinal or other fixture.

 

[arwat23]

I guess my question has to do with proposing the actual number of fixtures, but they are in 3 bathrooms, not 4.

So in the multi-user restrooms per CPC configuration, 2 men and 2 women could be using toilets or urinals at one time.
In the single user version, only 3 people could use them at one time (because I’ve put a toilet+urinal in one single-user restroom.. Does that still meet code?

As long as you hit the minimum required number of fixtures, you're good. A urinal in a single-user restroom still counts towards the total even though one person will occupy the room with both fixtures.