International Residential Code (IRC) Plumbing Practice Test

The correct height for measuring the minimum area and dimension above the shower drain outlet is specified in the International Residential Code. The standard requirement is that this measurement should be taken from a height of 70 inches above the finished shower drain outlet. This height ensures that the measurements account for the space typically utilized by users, promoting both safety and practicality in design. Adhering to this standard helps ensure that adequate headroom is provided in shower installations, complying with both code requirements and industry best practices.

The other options reflect higher measurements than what the code specifies, which would not only be unnecessary but could also lead to confusion when assessing compliance with the standards for shower areas.