According to BP 220, what is the minimum distance of vertical firewall projection upwards?

The correct minimum distance for a vertical firewall projection upwards, according to BP 220, is indeed 300 mm. This specification is crucial for ensuring adequate fire separation between buildings and preventing the spread of fire. The specified height aids in maintaining a safe environment, particularly in densely built areas where buildings may be in close proximity to one another.

In practice, a vertical projection helps to provide an additional barrier that extends above the roofline, thus minimizing the risk of flames leaping over the top of the firewall in the event of a fire. This requirement is part of a broader set of fire protection measures aimed at safeguarding both lives and property.

Understanding this requirement is essential for compliance with building laws and ensuring that structures meet fire safety standards.