3.2.2.1
Earth and Bedrock
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NOTE: Alternate drive anchor method may be
specified as an option where evidence indicates that
optional method under similar ground conditions has
satisfactory and proven performance record.
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Provide concrete bases of dimensions indicated [except in bedrock].
Compact concrete to eliminate voids, and finish to a dome shape. [In
bedrock, set posts with a minimum of 25 mm one inch of grout around each
post. Work grout into hole to eliminate voids, and finish to a dome shape.]
3.2.2.2
Concrete Slabs and Walls
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NOTE: Use the following paragraph where required by
the design, otherwise delete. Sleeve joints for
nonremovable fence sections are usually filled with
lead or nonshrink grout. Removable fence sections
may be useful as an economical means for providing
access to equipment. Sleeve joints in removable
fence sections may be a tight sliding type, or where
moisture entry could be a problem, filled with pipe
sulphur jointing compound.
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Set posts into zinc-coated sleeves, set in concrete slab or wall, to a
minimum depth of 300 mm 12 inches. Fill sleeve joint with lead, nonshrink
grout, or other approved material. Set posts for support of removable
fence sections into sleeves that provide a tight sliding joint and hold
posts aligned and plumb without use of lead or setting material.
3.2.3
Bracing
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NOTE: Use a single diagonal truss rod for fences
less than 3.7 m 12 feet high. Use two diagonal
truss rods on fences 3.7 m 12 feet and higher.
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Brace gate, corner, end, and pull posts to nearest post with a horizontal
brace used as a compression member, placed at least 300 mm 12 inches below
top of fence, and [a diagonal truss rod and truss tightener used as a
tension member] [two diagonal truss rods and truss tighteners used as
tension members].
3.2.4
[Top] [and] [Bottom] Rails
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NOTE: Top rails offer a handhold to climbers,
therefore do not specify where security is of utmost
importance. A top rail may be specified on fences
where appearance is an important factor and the
added cost is justified. Specify bottom rails only
when required by the design.
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SECTION 02821N
Page 13
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