Type A or Type B, nominal pipe size (NPS) 1-1/2. [Gate frames shall be
polyvinyl chloride-coated steel pipe (Group IA)(Group IC) with external
coating Type A, a nominal pipe size ()NPS) 1-1/2, conforming to ASTM F 1043.]
Gate fabric shall be as specified for chain link fabric. Gate leaves more
than 2.44 m 8 feet wide shall have either intermediate members and diagonal
truss rods or shall have tubular members as necessary to provide rigid
construction, free from sag or twist. Gate leaves less than 2.44 m 8 feet
wide shall have truss rods or intermediate braces. Intermediate braces
shall be provided on all gate frames with an electro-mechanical lock. Gate
fabric shall be attached to the gate frame by method standard with the
manufacturer except that welding will not be permitted. Latches, hinges,
stops, keepers, rollers, and other hardware items shall be furnished as
required for the operation of the gate. Latches shall be arranged for
padlocking so that the padlock will be accessible from both sides of the
gate. Stops shall be provided for holding the gates in the open position.
For high security applications, each end member of gate frames shall be
extended sufficiently above the top member to carry three strands of barbed
wire in horizontal alignment with barbed wire strands on the fence.
2.3
POSTS
2.3.1
Metal Posts for Chain Link Fence
**************************************************************************
NOTE: For high security fences that are to be
sensored, posts will be limited to Group IA or Group
IC steel pipe only.
**************************************************************************
ASTM F 1083, zinc-coated. Group IA, with external coating Type A steel
pipe. Group IC steel pipe, zinc-coated with external coating Type A or
Type B and Group II , roll-formed steel sections, shall meet the strength
and coating requirements of ASTM F 1043. Group III, ASTM F 1043 steel
H-section may be used for line posts in lieu of line post shapes specified
for the other classes. [Post shall be either Group IA steel pipe, Group
IC, Group II, roll-formed steel sections, or Group III steel H-sections and
shall be zinc coated (Type A) and polyvinyl chloride coated conforming to
the requirements of ASTM F 1043.] Sizes shall be as shown on the drawings.
Line posts and terminal (corner, gate, and pull) posts selected shall be
of the same designation throughout the fence. Gate post shall be for the
gate type specified subject to the limitation specified in ASTM F 900
and/or ASTM F 1184.
2.3.2
Metal Posts for Farm Style Fence
Metal posts shall conform to ASTM A 702 zinc-coated, [T-section]
[U-Section]; length as indicated. Accessories shall conform to ASTM A 702.
2.3.3
Composite Polyester Resin Reinforced Line Posts
**************************************************************************
NOTE: Composite posts are not allowed for high
security fences. Except for high security
applications, composite posts may be used as an
alternative to PVC coated steel line posts in salt-
laden or corrosive industrial atmospheres. Since
composite posts are non-conductive, fence grounding
procedures need to be detailed where grounding of
the fence is required.
SECTION 02821A
Page 8
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