proper alignment.
Metal posts shall be driven or set in concrete as
indicated.
3.4
RAILS
3.4.1
Top Rail
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NOTE: Top rail will not be used on high security
fences.
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Top rail shall be supported at each post to form a continuous brace between
terminal posts. Where required, sections of top rail shall be joined using
sleeves or couplings that will allow expansion or contraction of the rail.
Top rail, if required for high security fence, shall be installed as
indicated on the drawings.
3.4.2
Bottom Rail
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NOTE: This paragraph applies to high security fence
applications only.
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The bottom rail shall be bolted to double rail ends and double rail ends
shall be securely fastened to the posts. Bolts shall be peened to prevent
easy removal. Bottom rail shall be installed before chain link fabric.
3.5
BRACES AND TRUSS RODS
Braces and truss rods shall be installed as indicated and in conformance
with the standard practice for the fence furnished. Horizontal
(compression) braces and diagonal truss (tension) rods shall be installed
on fences over 1.83 m (6 feet) 6 feet in height. A center brace or 2
diagonal truss rods shall be installed on 3.66 m (12 foot) 12 foot fences.
Braces and truss rods shall extend from terminal posts to line posts.
Diagonal braces shall form an angle of approximately 40 to 50 degrees with
the horizontal. No bracing is required on fences 1.83 m (6 feet) 6 feet
high or less if a top rail is installed.
3.6
TENSION WIRES
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NOTE: For high security fence, the tension wire
will be installed within the top 100 mm (4 inches)
of the installed fabric.
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Tension wires shall be installed along the [top and] [bottom] of the fence
line and attached to the terminal posts of each stretch of the fence. Top
tension wires shall be installed within the top [305] [102] mm [1 foot] [4
inches] of the installed fabric. Bottom tension wire shall be installed
within the bottom 152 mm (6 inches) 6 inches of the installed fabric.
Tension wire shall be pulled taut and shall be free of sag.
3.7
CHAIN LINK FABRIC
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SECTION 02821A
Page 14
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