What is a fire door?

Answer 1

a fire door is one term for an access to or from an emergency exit.

A fire door is designed to keep smoke and fire from moving from one part of a building to another, and to provide a safe way to escape from a fire.

Not all fire doors lead directly outside; some lead to stairs or horizontal passageways, which lead to an exit door, either outside or to a safe area.

Fire doors are required for protection of any large openings in a fire wall that separates one part of a building from another. Some industrial fire doors are designed to slam shut during a fire and cannot be opened or used as an exit. There must be, of course, other fire doors that serve as exits.

Fire and safety codes generally require that fire doors be of a self-closing type and prohibit propping open or obstructing a fire door for any reason.