MIL-PRF-24613A(SH)
3.5.6 Indentation.
3.5.6.1 Initial indentation. The percent initial indentation of the deck covering material shall be as follows:
Type I
Type II
Type III
Type IV
Type V
Type VI
Max (percent)
Max (percent)
Max (percent)
Max (percent)
Max (percent)
Max (percent)
Class 1
5
5
5
5
5
5
Class 2
2
2
2
2
2
2
Class 3
5
5
5
5
5
5
Class 4
10
10
10
10
10
10
3.5.6.2 Residual indentation. The residual indentation of all materials shall not be greater than the following
maximum percentages:
Type I
Type II
Type III
Type IV
Type V
Type VI
Max (percent)
Max (percent)
Max (percent)
Max (percent)
Max (percent)
Max (percent)
Class 1
1
1
1
1
1
1
Class 2
0.5
0.5
0.5
0.5
0.5
0.5
Class 3
1
1
1
1
1
1
Class 4
0.5
0.5
0.5
0.5
0.5
0.5
3.5.7 Resistance to elevated temperatures. The deck covering materials shall not soften detectably by touch,
nor have a measured slippage greater than 0.03125 inch.
3.5.8 Resistance to moisture and temperature changes. The deck covering materials shall show no signs of
cracking, separation from the steel plate, or corrosion of the steel beneath the deck covering.
3.5.9 Moisture absorption.
3.5.9.1 Classes 1, 2, and 3. Class 1, 2, and 3 materials shall not absorb greater than 2 percent of moisture by
weight.
3.5.9.2 Class 4. Class 4 materials shall not absorb greater than 0.5 percent moisture by weight.
3.5.10 Resistance to chemicals. The deck covering system shall not exceed the following changes in weight
and volume.
Weight change
Volume change
Chemical
(percent maximum)
(percent maximum)
Oil
3
2
JP-5
2
1
AFFF (50% solution)
3
2
10% Sulfuric Acid
2
1
3.5.11 Resistance to corrosion. The deck covering material shall not soften or become detached; and the
surface of the steel beneath the deck covering material shall show no signs of corrosion, capillary action (wicking)
or other water penetration under the deck covering.
3.5.12 Fire performance. The deck covering system, including any required primer, underlayment and/or seal
coat(s), shall conform to the fire resistance requirements of MIL-STD-1623.
3.5.13 Shock resistance. The deck covering materials shall not show signs of chipping, cracking, or
detachment from the steel backing plate.
3.5.14 Adhesive strength.
3.5.14.1 Initial adhesive strength. The initial adhesive strength of the deck covering system (including any
required primer and/or underlayment) shall be not less than 250 pounds per square inch (psi).
10
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