Table C-25. Minimum Thickness of Thermally Tempered Glass (in.) to Survive Incident Overpressure from 1000-lb TNT

Custom Search

MIL-HDBK-1013/12
Table C-25
Minimum Thickness of Thermally Tempered Glass (in.) to Survive Incident
Overpressure from 1000-lb TNT, Aspect Ratio, a/b = 2.0
Standoff Distance (ft)
Plate
Dimensions
(in.)
a
b
60
100
200
300
24
12
5/8,
1/2
3/8,
1/4
1/4,
1/8
1/8,
1/8
36
18
5/8,
1/2, 1/2
1/2,
3/8
1/4,
1/4
1/4,
1/8
48
24
3/4,
3/4, 5/8
5/8,
1/2
3/8,
1/4
1/4,
1/4
60
30
3/4,
5/8, 5/8,
3/4,
5/8
3/8,
3/8
3/8,
1/4
5/8
72
36
5/8, 5/8, 5/8,  5/8, 1/2, 1/2
1/2, 3/8
3/8, 1/4
5/8, 5/8
84
42
3/4, 3/4, 5/8,  5/8, 5/8, 5/8
1/2, 1/2
3/8, 3/8
5/8, 5/8
Cross-section is too thick for typical security frame, requires
special consideration.
Table C-26
Minimum Thickness of Thermally Tempered Glass (mm) to Survive Incident
Overpressure from 460-kg TNT, Aspect Ratio, a/b = 2.0
Plate
Standoff Distance (m)
Dimensions
(m)
a
b
20
30
60
90
0.60
0.30
16,
12
9, 6
6, 3
3, 3
0.90
0.45
16,
12, 12
12, 9
6, 6
6, 3
1.20
0.60
19,
19, 16
16, 12
9, 6
6, 6
1.50
0.75
19,
16, 16,
19, 16
9, 9
9, 6
16
1.80
0.90
16, 16, 16,
16, 12, 12
12, 9
9, 6
16, 16
16, 16, 16
12, 12
9, 9
2.10
1.05
19, 19, 16,
16, 16
Cross-section is too thick for typical security frame, requires
special consideration.
149