What is the purpose of a parapet wall in firefighting contexts?

The purpose of a parapet wall in firefighting contexts is primarily to prevent the spread of fire and to provide protection against fire exposure. These low walls extend above the roofline of a building and serve as a barrier that can help contain flames and embers, reducing the risk of fire spreading to adjacent structures. This is especially critical in urban environments where buildings are in close proximity to one another.

Parapet walls can also help to limit the exposure of the roof and upper stories to radiant heat from surrounding fires, which enhances overall safety during firefighting operations. They are considered a fundamental feature in fire-resistive building design as they contribute to the overall fire safety of the structure.