Editing Wall (section)

===Fire wall===
{{main|Firewall (construction)}}
{{distinguish|Firewall (computing)}}

Fire walls resist spread of fire within or between structures to provide [[passive fire protection]]. A delay in the spread of fire gives occupants more time to escape and [[Firefighter|fire fighters]] more time to extinguish the fire. Some fire walls allow fire resistive window assemblies,<ref>{{cite book |title=NFPA 221 Standard for high Challenge Fire Walls, Fire Walls, and Fire Barrier Walls |at=Table 4.9.2 |edition=2021}}</ref> and are made of [[Combustibility and flammability|non-combustible]] material such as concrete, cement block, brick, or fire rated drywall. Wall penetrations are [[Hermetic seal|sealed]] with fire resistive materials. A doorway in a firewall must have a rated [[fire door]]. Fire walls provide varying resistance to the spread of fire, (one to four hours). Firewalls can also act as smoke barriers when constructed vertically from slab to roof deck and horizontally from an exterior wall to exterior wall subdividing a building into sections.