Distance Versus Weight of Explosives Method
NOTE: Distances over 60 feet are based on the formula
| ||
---|---|---|
Where
|
W = D x 1.5/90
W = weight
D = distance
|
Distance to Nearest Building
(feet)
|
Pounds Per Delay
| |
---|---|---|
0 to 5
|
1/4
| |
5 to 10
|
1/2
| |
10 to 15
|
3/4
| |
15 to 60
|
1 per ft.
| |
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)
|
0 to 100
|
1.50
| |
100 to 200
|
1.25
| |
200 to 500
|
1.00
| |
500 to 1,000
|
0.50
| |
Over 1,000
|
0.25
| |
*NOTE: The measuring instrument's transducer shall be firmly coupled
to the ground.
|