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 MIL-HDBK-1013/12
Table C-42
Minimum Thickness of Polycarbonate (in.) to Survive Incident Overpressure from
1000-lb (460-kg) TNT, Aspect Ratio, a/b = 1.5
Standoff Distance,
Plate
ft
Dimensions,
in. (m)
a
b
60
100
200
300
(20 m)
(30 m)
(60 m)
(90 m)
18
12
1 1/8
1/2
1/4
1/4
(0.45) (0.30) (28 mm)
(12 mm)
(6 mm)
(6 mm)
27
18
1 1/2
5/8
3/8
1/4
(0.68) (0.45) (38 mm)
(16 mm)
(9 mm)
(6 mm)
36
24
1 7/8
7/8
1/2
3/8
(0.90) (0.60) (48 mm)
(22 mm)
(12 mm)
(9 mm)
45
30
2 1/4
1
5/8
1/2
(1.12) (0.75) (57 mm)
(25 mm)
(16 mm)
(12 mm)
54
36
2 5/8
1 1/4
3/4
1/2
(1.35) (0.90) (67 mm)
(32 mm)
(19 mm)
(12 mm)
63
42
2 7/8
1 3/8
3/4
5/8
(1.58) (1.05) (73 mm)
(35 mm)
(19 mm)
(16 mm)
72
48
3 1/8
1 1/2
3/4
5/8
(2.25) (1.50) (80 mm)
(38 mm)
(19 mm)
(16 mm)
Cross-section is too thick for typical security frame,
requires special consideration.
160
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