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 MIL-HDBK-1013/12
Table C-38
Minimum Thickness of Polycarbonate (in.) to Survive Incident Overpressure from
1000-lb (460-kg) TNT, Aspect Ratio, a/b = 1.0
Standoff Distance,
Plate
ft
Dimensions,
in. (m)
a
b
60
100
200
300
(20 m)
(30 m)
(60 m)
(90 m)
12
12
7/8
1/2
1/4
1/4
(0.30) (0.30) (22 mm)
(12 mm)
(6 mm)
(6 mm)
18
18
1 1/4
5/8
3/8
1/4
(0.45) (0.45) (32 mm)
(16 mm)
(9 mm)
(6 mm)
24
24
1 1/2
3/4
3/8
3/8
(0.60) (0.60) (38 mm)
(19 mm)
(9 mm)
(9 mm)
30
30
1 3/4
7/8
1/2
3/8
(0.75) (0.75) (44 mm)
(22 mm)
(12 mm)
(9 mm)
36
36
2
1
5/8
3/8
(0.90) (0.90) (51 mm)
(25 mm)
(16 mm)
(9 mm)
42
42
2 1/8
1 1/8
5/8
1/2
(1.05) (1.05) (54 mm)
(28 mm)
(16 mm)
(12 mm)
48
48
2 1/4
1 3/8
3/4
1/2
(1.20) (1.20) (57 mm)
(35 mm)
(19 mm)
(12 mm)
54
54
2 3/8
1 3/8
3/4
5/8
(1.35) (1.35) (60 mm)
(35 mm)
(19 mm)
(16 mm)
60
60
2 5/8
1 1/2
7/8
5/8
(1.50) (1.50) (64 mm)
(38 mm)
(22 mm)
(16 mm)
Cross-section is too thick for typical security frame,
requires special consideration.
156
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