Desinging Bathrooms

Question 1

Residential bathrooms

Answer 1

Never in exterior walls
Should stack
Min requirements of 3 fixtures
Codes: 35sf min with tub. 30sf min with shower. 25 sf min powder room
Open compartmented
Storage for toiletries, linens and personal items
Quality can very greatly

Question 2

Commercial bathrooms

Answer 2

Locate near plumbing supply
Never in exterior walls
Fixture counts determined by occupancy per code
Hang fixtures back to back
Must meet ADA
Entries must be obvious- sight lines must be discreet
Provide stalls for privacy
Quality must fit use

Question 3

What is a plumbing chase?

Answer 3

Back to back /wall hung fixtures require 1’6” deep “chase” for support system and plumbing

Question 4

What is a plumbing wall?

Answer 4

Single fixture floor mounted fixtures require a 4”-6” deep wall cavity to accommodate plumbing

Question 5

After the 2015 IPC what changed?

Answer 5

Waster closet bowls for public or employee toilet facilities be of the elongated type. Seats provided for public or employee toilet families are required to be the hinged open front type

Question 6

After the energy policy act in 1994 what happened to toilets?

Answer 6

Low flush toilets. 1.6 gallons per flush a mandatory federal maximum for new toilets. Newer water conserving toilets can only use up to 1 gallon!

Question 7

What are ejector toilets?

Answer 7

Toilets that are usually located in the basement. It has to pump the waste up to a line

Question 8

What do commercial sinks have to have?

Answer 8

They must be touchless

Question 9

What are the 4 sink types and the 2 sub categories of 1?

Answer 9

Wall mount, pedestal, integral and counter top.
Under countertop there is overmount/rimmed and under mount

Question 10

Plumbing code Fixture counts

Answer 10

The international plumbing code dictates minimum quantities of fixtures per occupancy type and quantity

Question 11

Example Problem

You have a nursing home with 120 inmates and 20 employees.
– How many WCs you need

Answer 11

Divide120/15= 8 total (4 for female and 4 for male)

Question 12

Example Problem

According to International Plumbing Code, determine the following in a nightclub with an occupant load of 600
– Water Closets
– Lavatories
– Drinking Fountains

Answer 12

Assume equal male and female so we divide 600/2= 300
Water Closets -> divide 300/40=7.5 (round up to 8). Then answer is 8 for male and 8 for female
Lavatories -> divide 600/75= 8
Drinking Fountains = 2

Question 13

What is WaterSense?

Answer 13

plumbing fixtures are independently tested and certified in a partnership between EPA and manufacturers, retailers, and distributors, and utilities to provide water‐efficient products.
In general, products meeting WaterSense standards are 20 percent more efficient than comparable products.

Question 14

How many drinking fountains does a space need?

Answer 14

2 drinking fountains one of them being ADA

Question 15

NOTE: look at ADA section of “Designing Bathrooms” to review reaches and heights

Question 16

What are the 3 planning considerations for bathrooms?

Answer 16

Noise, sight lines, and smells

Question 17

per ADA requirements the top of the toilet seat should be at

Answer 17

17”-19” to top of seat

Question 18

per ADA requirements the top of the grab bar should be at

Answer 18

33”-36” to top of gripping surface

Question 19

When a door pulls in per ADA the pull side should be how wide?

Answer 19

18”

Question 20

when a door pushes out the push side should be how wide?

Answer 20

12”

Question 21

for lavatories reach depths should not exceed

Answer 21

25”

Question 22

for lavatories leg area on lavatories should not excceed 17”