the fire door is usually rigged with an alarm that in some cases immediately calls the fire department
A front door is usually at the front of a house. The back door is kind of like a fire exit at the back of the house.
A smoke door is designed to prevent the spread of smoke during a fire, while a fire door is designed to resist fire and prevent its spread for a specified period of time. Fire doors are typically rated for a specific amount of time (e.g. 60 minutes), whereas smoke doors are designed to limit smoke transmission without a fire rating.
Fire rated doors comply with certain standards (NFPA 80) and building codes so that the door functions to reduce the spread of fire and smoke.
It has to be a fire rated door.
What
Class K fire extinguishers are potassium based, which react chemically with the cooking oil to produce froth. The froth rises from the bottom to the surface, and smothers the fire.
The difference is that the kindle fire is thicker but has more chances than the nook.
What
What
when there is a fire you go out of the Fire Door.
Steel door would have a higher fire rating.