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4.4 Restrooms
Rest Room Layout 7’ min
18” min
5’
5’ min
2’-8” 5’
5’ 16” min
14” min
Minimum Toilet Facilities Water Closets Female Male 1/20
Lavatories
Urinals
each sex
33%
1/50
1/25
Example 30000 sq. ft. floor plate 1 person/100 sq. ft. 150 Male
= 300 people
@ 1/25 = 4 toilets and 2 urinals
150 Female @ 1/20
= 8 toilets
Lavatories
= 3 each
A lot has to be considered when designing and laying out a rest room within an office environment. After the design of the building is determined, then the core layouts can be deciphered. Rest rooms generally are considered part of the core as this is the central location easily accessible by all. The size of the rest room is to be determined by the overall square footage of the building, and the occupancy rating of the building. For an office the occupancy rating is 1 person for every 100 square feet. Of the result number this is divided in half for men and women. For every 25 males and 20 females a separate water closet is required. The men’s rest room, has the exception with that 33 % of the water closets are required to be urinals. Lavatories, are also required at 1 for every 50 people, male and female. These are considered minimum requirements, so having more is not necessarily bad. Cost and space ultimately limit this number to the minimum, but this should not be held as a design restraint. Other functions incorporated with the rest room core include a water fountain, and a janitor’s closet with mop sink. As well, as the dimensions discussed in the previous section, other dimensions have to be considered for comfort purposes as well as handicapped accessibility. A double entry door is recommended for privacy with minimum dimensions as noted in the drawing on the left, along with the minimum dimensions of a single stall, that allow for comfort entering and using the facilities. Along with this can be addressed the handicapped accessibility requirements.