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|  MIL-S-464F(ME)
Crushed stone (column B, table I) - in the reverse direction at 75
b.
pounds per square yard.
Determine the rate of each spread by weighing aggregate from three samples that
have been collected at random. Each sample shall be weighed separately to
determine spreading accuracy. A sample shall consist of the aggregate from an
area 1 yard square.
4.52.2.1 Failure criteria. Inability to spread each size aggregate within
+10 percent by weight, coverage not uniform or width of spread less than 8 feet
shall constitute failure of this test.
4.5.2.2.2 Spreading width reduction. Reduce the spreading width to 6 feet
and operate the spreader to distribute any size aggregate in table I. Reduce
the spreading width to 4 feet and repeat the operation.
4.5.2.2.2.1 Failure criteria, Inability to install the block-off -plates, a
spreading width that is not within 2 inches of the set width, or coverage not
uniform shall constitute failure of this test.
4.5.2.3 Operational. Operate the spreader to distribute any size aggregate
specified in table I for a period of not less than 8 hours. Only actual
spreading time shall be counted toward the 8-hour requirement.
4.5.2.3.1 Failure criteria. Any malfunction of any control, difficulty in
operating any control, or any permanent deformation or damage to any part of the
spreader shall constitute failure of this test.
4.5.2.4 Dump body clearance, With the spreader attached to the truck for
spreading operations, raise the dump body to its maximum height (see 3.7).
4.5.2.4.1 Failure criteria. Interference between the body and any part of
the spreader shall constitute failure of this test. Where overflow belting is
provided, contact between the belting and the truck shall be permitted provided
no permanent deformation or damage to the belting results.
4.5.2.5 Transportability. Using the procedure specified in 3.12.5, assemble
the spreader, for transport and attach the spreader to the truck. Anchor the
items-specified in 3.12-in the hopper and tow the spreader over smooth surfaced
roads not less than 100 miles at an average speed of not less than 25 miles per
hour including speeds up to 35 mph.
4.5.2.5.1 Failure criteria. Difficulty in attaching the spreader to the
pintle of the truck; inability to complete 100 miles of specified testing
because of damage to any part of the spreader or transport assembly; items not
remaining anchored in place in the hopper; a pintle load less than 150 pounds or
more than 300 pounds; or inability to attain a speed of 35 mph without damage to
the spreader shall constitute failure of this test.
4.5.2.6 Lifting provisions.
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