QUARRYSTONE
Areas where quarrystone is to be placed shall be trimmed and dressed as needed to provide stable
bedding and placement within allowable tolerances. Where armor stone areas are below the required
depth, they shall be brought to grade by filling with a stone underlayer. To the extent practicable, the
larger sizes of stone in the underlayer shall be placed on the upper surface of the underlayer. Armor and
toe stone shall be in pieces generally compact in shape and as nearly cubical as possible, with the least
dimension of any stone being not less than one-third its greatest dimension.
All required stone shall be produced from quarries approved by the Owner.
It shall consist of a well-graded mixture of sizes that will form a compact mass in place. The
armor and underlayer stone shall conform to maximum and minimum size limits as specified on the
drawings. Where space does not permit the inclusion of the larger sizes of stone, these shall be omitted
from the mixture.
Stones shall be placed by equipment suitable for handling material of the sizes required. The
armor stone shall be placed a minimum of two layers thick. Suitable equipment shall be used to carefully
place the stone. End dumping will not be permitted, nor shall stones be dropped from a height greater
than three feet. Stones shall not be dropped onto exposed filter fabric.
Armor and toe stones shall be placed to the grades sown up the drawings, within a tolerance of
0.5 foot above grade or 0.5 foot below grade, measured perpendicular to the grade lines. The intention is
for the stone protection to be built to at least the grade lines, with the outer surfaces reasonably even and
uniform in appearance, and with no extreme ranges in tolerance between adjacent stones.
FILTER FABRIC
The armor and toe stone shall be underlain with a plastic filter cloth, the openings of which are
appropriate for the soil conditions at the site. The cloth shall contain stabilizers or inhibitors to prevent
deterioration of the fabric due to ultraviolet light or heat exposure. The fabric should be manufactured so
that the yarns maintain their relative positions and spacings. In addition, the edges of the fabric shall be
finished to prevent ravelling or pulling away from the main body of the cloth.
All seams in the fabric shall be sewn with thread that matches the chemical and strength requirements
described above, or they shall be bonded by cementing or by heat.
No fabric shall be used if it has defects, rips, flaws, holes or otherwise shows signs of
deterioration or damage during manufacture, transportation or storage. The fabric shall be placed with
the long dimension perpendicular to shore and shall be free of tension, stress, folds, wrinkles or creases.
Overlap between adjacent sheets shall be a minimum of 15 inches. Securing pins shall penetrate
both layers of overlapped fabric at 3-foot intervals. These pins shall be 3/16-inch in diameter, at least
18inches long, and with heads capable of retaining 1.5-inch washers.
SHOP DRAWINGS
Shop drawings shall be submitted to the Owner for his approval. The Contractor shall furnish, at
the Owner's request, a certified copy of all mill reports covering the chemical and physical properties of
the steel used in the work.
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