The "W" section steel palisade pales strength is derived from the W shape profile formed in their cross section during the rolling process.W Section Palisade Fence
The 2.5mm general purpose and the 3.0mm security "W" section pales are generally fixed to the rails with 8mm anti vandal rivets and collars (requiring specialist tools to set) or 8mm Tee head bolts with permacone (shear) nuts.
The shape of the "W" section profile offers increased protection to the head of the fixing as the head is recessed into the profile, also the "W" profile gives a positive contact between the pale and the rail at the fixing point making removal of the fixings more difficult.

Specification
Width	Thickness	Surface Treatment	Head	Height
68mm - 70mm	2.0mm 2.5mm 3.0mm	Galvanized and  Electrostatic polyester coated or Hot dipped galvanized	Single point Triple point	1200mm
				1500mm
				1800mm
				2000mm
				2100mm
				2400mm
				2700mm
				3000mm