
Fence structures
FlexPS Product Guide
Page 9
Standard fence types
Chain-link fence
Chain-link fence is comprised of steel wires that are bent lengthwise into zig-zag patterns. The zig-
zag wires are vertically woven to form the characteristic diamond pattern. The fence fabric is
attached to fence posts approximately 3 m (10 ft.) apart. Tension wires are often used to stiffen the
fence fabric at the top, bottom and middle of the fence. Chain-link fences are available in different
heights and are sometimes vinyl coated.
Weld-mesh fences
A typical weld-mesh fence section consists of steel wire welded into a grid, with horizontal spacing
differing from vertical spacing. These fence sections are secured to fence posts and to top and
bottom rails.
Palisade fences
Palisade fences usually consist of vertical metal stakes that are attached to horizontal support
members, which are supported by metal posts. The effectiveness of FlexPS on a palisade fence
depends on the characteristics and construction of the particular fence. Palisade fences conduct
vibrations well and any attempt to cut into the fence will be detected. However, because the fence
is rigid, climb-over intrusion attempts are more difficult to detect on a palisade fence than on than
chain-link or weld-mesh fences. A trial on a section of the palisade fence is recommended before
an entire system is installed to determine if the climb-over detection meets the site requirements.
Climb-over deterrent hardware
Barbed wire outriggers must be secure to prevent movement due to environmental conditions.
Install bracing wires between the outrigger supports to prevent the barbed wires from spreading
apart. Each barbed wire strand should be taut and tightly secured at each support. Any extension
arms or outriggers attached to post tops should have a tight press-fit or be spot-welded. Remove
or fasten any loose or rattling equipment.
Figure 1: Fence types
Note
Ornamental palisade fences, which use non-metallic support pillars
(e.g., concrete or brick) may not be suitable for use with the FlexPS
system. The non-metallic pillars can make the fence vulnerable to
climb-over intrusions.
chain-link
weldmesh
palisade