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 MIL-HDBK-1013/12
Table C-41
Minimum Thickness of Polycarbonate (in.) to Survive Incident Overpressure from
500-lb (230-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
3/4
3/8
1/4
1/4
(0.45)
(0.30)
(19 mm)
(9 mm)
(6 mm)
(6 mm)
27
18
1
1/2
3/8
1/4
(0.68)
(0.45)
(25 mm)
(12 mm)
(9 mm)
(6 mm)
36
24
1 1/4
5/8
3/8
3/8
(0.90)
(0.60)
(32 mm)
(16 mm)
(9 mm)
(9 mm)
45
30
1 3/8
7/8
1/2
3/8
(1.12)
(0.75)
(35 mm)
(22 mm)
(12 mm)
(9 mm)
54
36
1 1/2
7/8
1/2
3/8
(1.35)
(0.90)
(38 mm)
(22 mm)
(12 mm)
(9 mm)
63
42
1 5/8
1
5/8
1/2
(1.58)
(1.05)
(41 mm)
(25 mm)
(16 mm)
(12 mm)
72
48
1 3/4
1 1/8
3/4
1/2
(2.25)
(1.50)
(44 mm)
(28 mm)
(19 mm)
(12 mm)
159
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