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How To Calculate Plumbing Fixture Count?

Do you want to install a plumbing system that requires plumbing fixtures but you do not know how to calculate plumbing fixture count? What are some steps for determining the number of plumbing fixtures? If yes, then no worries. We’ve got you covered.

To understand how to calculate plumbing fixture count, you need to know the occupational load, then divide it by 2 to measure it for both sexes. You can either use standard or fractional methods to calculate the plumbing fixture count for mixed buildings.

Let’s dive deep into every step to know exactly how to determine it.

  1.  Determining the number of plumbing fixtures

To determine the minimum number of plumbing fixtures for the required building, you have to consider the intended purpose. You can know it by identifying them in factories, residential, and educational categories.

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Occupation Load Determination

After you have figured out the use, the next step is to calculate the occupation load. It is configured by considering the occupational load for all areas. The users use both the outdoor and indoor areas, so you have to sum up the whole to assess the total occupational load.

Occupation Load Break Down

To measure the minimum number of fixtures. The occupation load should be broken down into 50% male and 50% female. The total number of required closets should be equal for both the males and the females.

Methods for Mixed-Use Buildings

In the case of mixed buildings, the process is a little bit complex and may need separate facilities. The method to calculate for mixed-use buildings are:

 Standard Method

Allocate each area an occupant load per table A and then, with the help of CPC, measure the required number of fixtures for every use. Sum up the assigned fixture for each use to calculate the number of plumbing fixtures.

 Fractional Method

Give each area an occupant load per table A. Then divide the measured occupant load by permitted fixture per person. To calculate the total number of plumbing fixtures, add all the fractions of the use area and round it to the whole closet number.

Urinal Counts

Suppose the occupant load is less than 50. Single-occupant toilet facilities are given for each sex. Group A or E. In that case, a second toilet will not be allowed for the female water closet.

If the urinal is still supplied and the minimum requirement, one urinal must be reduced from the male count. However, it should not be deducted less than 2/3rd of the desired requirement.

2.   Separate Facilities

Separate bathroom facilities should be given for each gender except household units, areas with a total occupant of less than ten or less. Moreover, it should also be provided to business and mercantile occupancies if the total occupant load is 50 or less, given that one person at a time shall use it.

3.  Facilities Serving Employees And Customers

The desired facilities for employees working in shopping centers and malls should be installed at a central location at different stores accessible to all employees. The staff working other than shopping centers and malls should be present at travel distance, not more than 300 feet.

For drive-thru, take-out, toilets should be provided. However, if space has seating arrangements, toilets should be available in dining areas.

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4.   Access To Toilet Facilities

Access to the toilet shall be within one vertical story. For customers, the toilet should not be in space used by employees.

5.   Portable Restrooms

In the case of the portable restroom, only a temporary sales office meets the criteria for the required number of plumbing fixtures. The desired plumbing fixture must be linked to water and sewer service for a temporary sales office.

6.   Privacy

Use privacy partitions for the water closets and urinals used by the public and employees.

The Verdict

Measuring the fixture count might be confusing, but you can easily calculate fixture count with this guide. We hope this article has helped you to know how to calculate plumber fixture count.

Follow the step-by-step instructions to determine the fixture count for your required buildings, kitchen, mall, or any space now!

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