We section high security fencing is another style of palisade. This type of fencing is an extremely effective first line of defense against the more aggressive intruder. Suitable for high security use. W section palisade is stronger and more durable than D section and is a lot more effective as high security fencing. (2)D pale palisade in the thickness of 3mm is considered for general purpose fencing and it can be divided into the following types. Wooden pallet+papercarton+pvc film.