Upgrade existing structures
4 - 4 • • • Intelli-FLEX II product guide
Chain-link fences
Chain-link fences are one of the most popular types of perimeter fences, hence,
Intelli-FLEX II is often installed on an existing chain-link fence.
The chain-link fence fabric should meet the following minimum specifications:
•
9 GA (2.9 mm dia.) galvanized steel, 2.5 to 7.5 cm (1 to 3 in.) mesh chain-link
(or weld-mesh)
•
Selvages - Top sides twisted and barbed, bottom side knuckled.
•
Thread stretcher bars through the fabric using 1 bar for each gate and end
post, and 2 for each corner and pull post. Pull fabric tight so maximum fabric
deflection is 5.0 cm (2 in.) when a 14 kg (30 lb.) pull is exerted perpendicular
to the center of a panel.
•
Maintain tension by securing stretcher bars to posts with metal bands spaced
a maximum of 38 cm (15 in.) apart. Fasten the fabric to the steel framework
with 9 gauge steel wire ties spaced a maximum of 30 cm (12 in.) apart - for all
posts, rails, braces, and tension wires.
•
Tighten stretcher bar bands, wire ties, and any other fasteners very securely.
None of the fabric should be free to move.
Any fence movement which can cause metal-to-metal
contact may be a potential source of nuisance alarms.
Tension wires can be installed horizontally to stiffen the
fence fabric. These wires should be secured at each
post so they will not allow any perceptible movement
between the wire and the post when the fabric is flexed.
This can be done using wire ties or metal straps.
Weld-mesh fences
Weld-mesh fences are also common types of perimeter metal fabric fence. A
typical weld-mesh fence section consists of 3 mm (0.1 in.) diameter steel wire
welded into a grid configuration, with horizontal spacing differing from the
vertical spacing. These fence sections are secured to fence posts, to top and
bottom rails, and to the adjacent fence panel sections. The sections of weld-mesh
fence are either welded together or connected using clips, bolts or rivets.
Make sure that the weld-mesh fence fabric panels are
well secured to the mounting poles and to each other.