What is the prescribed height of the airport perimeter wall ?

What is the prescribed height of the airport perimeter wall ?

10 ft of wall with concertina coil overhang of 2 ft
8 ft of wall with concertina coil overhang of 1½ ft
9.5 ft of wall without any concertina coil
10 ft of wall or fence
This question was previously asked in
UPSC CISF-AC-EXE – 2020
A commonly prescribed height for an airport perimeter barrier includes an 8 ft wall or fence topped with an additional 1½ ft of concertina coil overhang.
Airport perimeter barriers are designed to deter and prevent unauthorized entry. The height and design, including the use of difficult-to-climb elements like concertina wire, are standardized to provide a significant physical obstacle. The concertina coil effectively increases the overall barrier height and makes climbing much more hazardous.
While exact specifications might vary slightly based on national regulations and specific site requirements, the combination of a solid wall/fence of around 8 feet with an added overhang of sharp wire (like concertina coil) of about 1.5 to 2 feet is a widely adopted standard for airport perimeter security worldwide.