Distance Versus Weight of Explosives Method
NOTE: Distances over 60 feet are based
on the
formula W=D x 1.5/90
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Where:
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|
W = weight
|
|
D = distance
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Distance to Nearest Building
(feet)
|
No. of Pounds per Delay
|
---|---|
0 to 5 1/4
| |
5 to 10 1/2
| |
10 to 15 3/4
| |
15 to 60
|
1 per ft. D
|
60 to 70
|
6
|
70 to 80
|
7 1/4
|
80 to 90
|
9
|
90 to 100
|
10 1/2
|
100 to 110
|
12
|
110 to 120
|
13 3/4
|
120 to 130
|
15 1/2
|
130 to 140
|
17 1/2
|
140 to 150
|
19 1/2
|
150 to 160
|
21 1/2
|
160 to 170
|
23 1/4
|
170 to 180
|
25
|
180 to 190
|
28
|
190 to 200
|
30 1/2
|
200 to 220
|
34
|
220 to 240
|
39
|
240 to 250
|
42
|
250 to 260
|
45
|
260 to 280
|
49
|
280 to 300
|
55
|
300 to 325
|
61
|
325 to 350
|
69
|
350 to 375
|
79
|
375 to 400
|
85
|
400 to 450
|
98
|
450 to 500
|
115
|
500 to 550
|
135
|
550 to 600
|
155
|
600 to 650
|
175
|
650 to 700
|
195
|
700 to 750
|
220
|
750 to 800
|
240
|
800 to 850
|
263
|
850 to 900
|
288
|
900 to 950
|
313
|
950 to 1,000
|
340
|
1,000 to 1,100
|
375
|
1,100 to 1,200
|
435
|
1,200 to 1,300
|
493
|
Distance Versus Peak Particle Velocity
Method
| |
---|---|
Distance
(feet)
|
Peak Particle Velocity of Any One Component*
(inches per second)
|
1 to 100
|
1.50
|
100 to 200
|
1.25
|
200 to 500
|
1.00
|
500 to 1,000
|
.50
|
Over 1,000
|
.25
|
*Note: The measuring instrument's transducer
shall be firmly coupled to the ground.
|