2.2.2
Detectable Warning Tape for Non-Metallic Piping
Polyethylene plastic tape conforming to the width, color, and printing
requirements specified above. Minimum thickness of the tape shall be 0.10
mm 0.004 inch. Tape shall have a minimum strength of 10.3 MPa 1500 psi
lengthwise and 8.6 MPa 1250 psi crosswise. Tape shall be manufactured with
integral wires, foil backing, or other means of enabling detection by a
metal detector when tape is buried up to 920 mm 3 feet deep. Encase
metallic element of the tape in a protective jacket or provide with other
means of corrosion protection.
2.3
DETECTION WIRE FOR NON-METALLIC PIPING
Detection wire shall be insulated single strand, solid copper with a
minimum of 12 AWG.
2.4
MATERIAL FOR RIP-RAP
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NOTE: Make sure there is no duplication of rip-rap
requirements between this and other specification
sections. In this paragraph refer to standard
specifications for rip-rap if local specifications
are satisfactory and available. Delete this
paragraph or subparagraphs not required in the
project.
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Provide [Bedding material] [Grout] [Filter fabric] and rock conforming to
[these requirements] [DOT] [SSS-[_____] State Standard] for construction
indicated.
2.4.1
Bedding Material
Consisting of sand, gravel, or crushed rock, well graded, [or poorly
graded] with a maximum particle size of 50 mm 2 inches. Material shall be
composed of tough, durable particles. Fines passing the 75 micrometers No.
200 standard sieve shall have a plasticity index less than six.
2.4.2
Grout
Composed of cement, water, an air-entraining admixture, and sand mixed in
proportions of one part portland cement to [two] [_____] parts of sand,
sufficient water to produce a workable mixture, and an amount of admixture
which will entrain sufficient air to produce durable grout, as determined
by the Contracting Officer. Mix grout in a concrete mixer. Mixing time
shall be sufficient to produce a mixture having a consistency permitting
gravity flow into the interstices of the rip-rap with limited spading and
brooming.
2.4.3
Rock
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NOTE: Adjust weights in brackets to fit
application. Take local practice into consideration.
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Rock fragments sufficiently durable to ensure permanence in the structure
and the environment in which it is to be used. Rock fragments shall be
SECTION 02300
Page 21
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