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2. Dropped ceiling - Wikipedia

   en.wikipedia.org/wiki/Dropped_ceiling

   To address fire safety, ceiling tiles made from mineral fibres, plastic, tin, composite, or fire-rated wood panels can be used within the construction to meet acceptable standards/ratings. Some tiles, in specific situations, can provide the needed additional resistance to meet the "time rating" required for various fire code, city ordinance ...

3. Flame spread - Wikipedia

   en.wikipedia.org/wiki/Flame_spread

   The Life Safety Code (NFPA 101) [5] and Section 803.1 of the International Building Code limit finishes for interior walls and ceilings to materials in three classes (A, B, or C, with A being the lowest flame spread and C being the highest) and gives greater restrictions for certain rooms:

4. Plenum space - Wikipedia

   en.wikipedia.org/wiki/Plenum_space

   A plenum space is a part of a building that can facilitate air circulation for heating and air conditioning systems, by providing pathways for either heated/conditioned or return airflows, usually at greater than atmospheric pressure. Space between the structural ceiling and the dropped ceiling or under a raised floor is typically considered ...

5. Firewall (construction) - Wikipedia

   en.wikipedia.org/wiki/Firewall_(construction)

   Firewall (construction) Firewall residential construction, separating the building into two separate residential units, and fire areas. Example of a firewall used to inhibit the spread of a fire at an electrical substation. A firewall is a fire-resistant barrier used to prevent the spread of fire. Firewalls are built between or through ...

6. Vision panel - Wikipedia

   en.wikipedia.org/wiki/Vision_panel

   Vision panel. Fire-resistance rated door, with wire mesh glass vision panel. A vision panel is a small window in a door which allows people to look through without opening the door. Vision panels are sometimes in walls, generally adjacent to a door. These have implications in safety, primarily to avoid opening doors on a person coming the other ...

7. Fire door - Wikipedia

   en.wikipedia.org/wiki/Fire_door

   Fire-resistance rated door, with wire mesh glass vision panel Industrial grade fire door rated to hydrocarbon curve and blast resistance Double fire door immediately after 3-hour fire test inside a 4-hour rated Durasteel wall Double fire door after 3-hour fire test in a 4-hour Durasteel wall, during successful 45PSI (3.1 bar) hose stream test leading to a UL Listing [1]