Last edited 07 Oct 2020

Protected escape route

Approved document B, Fire Safety, Volume 2, Buildings other than dwellinghouses, defines an escape route as:

‘The route along which people can escape from any point in a building to a final exit.’

Where a final exit is: 'The end of an escape route from a building that gives direct access to a street, passageway, walkway or open space, and is sited to ensure that people rapidly disperse away from the building so that they are no longer in danger from fire and/or smoke. NOTE: Windows are not acceptable as final exits.'

Escape routes can be protected or unprotected, where an unprotected escape route is the unprotected part of an escape route which a person has to traverse before reaching either the safety of a final exit or the comparative safety of a protected escape route, i.e. a protected corridor or protected stairway.

A protected corridor/lobby is, 'A corridor or lobby that is adequately protected from fire in adjoining areas by fire resisting construction.'

A protected stairways is, ‘A stair that leads to a final exit to a place of safety and that is adequately enclosed with fire resisting construction. Included in the definition is any exit passageway between the foot of the stair and the final exit.'


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