Functional school planning has long been considered a fundamental concept of school design. However in planning educational facilities, it is also important to include the dimensions of comfort, convenience and healthfulness. The school toilet is one o most crucial elements for the recent changing fact in school design, but the number of toilets and urinal in most schools may not be sufficient to meet current needs, especially in the girl`s toilet rooms. This study aims to suggest a guideline in designing school toilet facilities and propose the optimal number of toilets and urinals regarded to age and sex. The survey is conducted through questionnaires collected from 998 respondents including 300 teachers in ChungNam province. Based on the results of this study, it is suggested that the number of toilets in the elementary school be required by ratio of 25 boys per toilet, 13 boys per urinal and 8 girls per toilet, in the middle school by ration of 22 boys per toilet, 15 boys per urinal and 7.5 girls per toilet, and in the high school by ratio of 20 boys per toilet, 10 boys per urinal and 7 girls per toilet. It also proposes a formulae for calculating the optimal number of toilets and urinals, which can be used for other plumbing fixture required in school facilities.
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