What is the required minimum depth for plastic piping or tubing installed under a commercial parking lot?

The required minimum depth for plastic piping or tubing installed under a commercial parking lot is 24 inches. This depth is specified to ensure that the piping is protected from damage caused by vehicular traffic and other potential surface disturbances. The installation depth acts as a safeguard against impacts and heavy loads, which can lead to deformation or breakage of the piping material.

Additionally, the 24-inch requirement allows for adequate soil cover, which helps in minimizing temperature fluctuations and potential freeze-thaw cycles that could affect the integrity of the pipe. Understanding these installation requirements is crucial for ensuring the longevity and reliability of gas distribution systems beneath high-traffic areas.