What is the minimum required height for parapet walls?

The minimum required height for parapet walls being 30 inches is based on building code requirements that help ensure safety and prevent falls from rooftops or other elevated surfaces. A parapet wall serves as a protective barrier at the edge of a roof and is critical for safeguarding individuals from the risk of falling, especially in areas where the roof is accessible or where there may be potential foot traffic. This height is seen as sufficient to deter accidental falls while not presenting significant barriers to maintenance or access for roof work.

It is also important to recognize that codes may specify different heights depending on certain conditions, such as the use of the roof or building occupancy. For example, buildings with lower occupancy rates may have different requirements, but in general use scenarios, the 30-inch height is considered a standard to promote safety effectively. The specifics of these requirements may vary by jurisdiction, reinforcing the need for building inspectors to be aware of local building codes in addition to the general guidelines.