free from cracks, seams, and other defects that would increase the risk of
deterioration from natural causes. The size of the fragments shall be such
that no individual fragment exceeds a weight of [68] [_____] kg [150]
[_____] pounds and that no more than 10 percent of the mixture, by weight,
consists of fragments weighing 0.91 kg 2 pounds or less each. Specific
gravity of the rock shall be a minimum of [2.50] [_____].
The inclusion
of more than trace [1 percent] [_____] quantities of dirt, sand, clay, and
rock fines will not be permitted.
2.5
CAPILLARY WATER BARRIER
Capillary Water Barrier shall consist of clean, poorly graded crushed rock,
crushed gravel, or uncrushed gravel placed beneath a building slab with or
without a vapor barrier to cut off the capillary flow of pore water to the
area immediately below. Fine aggregate grading shall conform to ASTM C 33
with a maximum of 3 percent by weight passing ASTM D 1140, 75 micrometers
No. 200 sieve, [or] [37.5 mm 1-1/2 inches and no more than 2 percent by
weight passing the 4.75 mm No. 4 size sieve] [or coarse aggregate Size 57,
67, or 77].
2.6
PIPE CASING
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NOTE: Indicate, on the contract drawings, limits of
right-of-way and any other site requirements or
dimensions conforming to the standards of the
railroad or highway owner.
Where traffic can be
interrupted, trenching in a pipeline casing is more
economical with the same advantages of allowing
future work without interruption of traffic.
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2.6.1
Casing Pipe
ASTM A 139/A 139M, Grade B, or ASTM A 252, Grade 2, smooth wall pipe.
Casing size shall be of the outside diameter and wall thickness as
indicated. Protective coating is not required on casing pipe.
2.6.2
Wood Supports
Treated Yellow Pine or Douglas Fir, rough, structural grade. Provide wood
with nonleaching water-borne pressure preservative (ACA or CCA) and
treatment conforming to AWPA P5 and AWPA C2, respectively. Secure wood
supports to carrier pipe with stainless steel or zinc-coated steel bands.
PART 3
EXECUTION
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NOTE: Coordinate requirements with Section 02231
CLEARING AND GRUBBING.
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3.1
STRIPPING OF TOPSOIL
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NOTE: Topsoil will be separately excavated, stored,
and used for surface finish in preparation for
seeding, sodding, or other planting, only where
topsoil is definitely superior for grass and plant
SECTION 02300
Page 22
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