Interlogix FlexZone Series, Product Manual

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Chapter 1: System planning
4
FlexZone™ Product Guide
Standard flexible fence types
Figure 1: Fence types
chain-link welded mesh expanded metal
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
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. Vinyl coated fences generally require double cable
passes, due to the vibration dampening effect of the vinyl coating.
Welded-mesh fences
A typical welded-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 often include top and bottom rails.
Expanded metal fences
Expanded metal mesh is typically comprised of a metal material with diamond
shaped holes.
Metals can be expanded in a range of material thickness and to a broad choice
of patterns to suit specific applications. Expanded metal mesh is available with a
variety of diamond size openings and gauges that can be attached to a typical
fence framework of round pipe and line rails.
Note: High-security welded-mesh and expanded metal fences are comprised of
heavier gauge metal than the standard flexible fence types. Therefore, these
high-security fence types may have to be defined as Rigid fences via the UCM.
Begin testing with the Flexible fence setting and use the Rigid fence setting only
if adequate detection sensitivity cannot be achieved at the Flexible fence setting.
Note: Fences that are covered with vinyl privacy slats or other screening material
may not be suitable for the FlexZone sensor due to the vibration dampening
characteristics of the screening materials. If your fence includes privacy
screening, contact our Customer Service before attempting to install a FlexZone
sensor system.