This fire resistance.
Fire resistance rating of building materials.
While no building materials are entirely fireproof building with fire safe products can help enhance resistance to heat and flame during a fire.
Nevertheless brick is commonly cited as among the best building materials for fire protection.
Depending on the construction and thickness of the wall a brick wall can achieve a 1 hour to 4 hour fire resistance rating.
A brick wall is held together with mortar which is less effective.
For example fire resistance ratings will help determine if a given building construction will allow enough time for people to exit a burning building before it collapses kruppa 1997.
Fire resistance tests elements of building construction part 10.