Quantity of explosives Distances in feet--------------------------------------------------------------------------------------------------------------------------------------------------------
Inhabited buildings Public highways with traffic Passenger railways--public Separation of magazines
-------------------------------- volume of 3000 or fewer highways with traffic volume -------------------------------
Pounds not vehicles/day of more than 3,000 vehicles/Pounds over over -------------------------------- day
Barricaded Unbarricaded -------------------------------- Barricaded Unbarricaded
Barricaded Unbarricaded Barricaded Unbarricaded--------------------------------------------------------------------------------------------------------------------------------------------------------
0 5 70 140 30 60 51 102 6 12
5 10 90 180 35 70 64 128 8 16
10 20 110 220 45 90 81 162 10 20
20 30 125 250 50 100 93 186 11 22
30 40 140 280 55 110 103 206 12 24
40 50 150 300 60 120 110 220 14 28
50 75 170 340 70 140 127 254 15 30
75 100 190 380 75 150 139 278 16 32
100 125 200 400 80 160 150 300 18 36
125 150 215 430 85 170 159 318 19 38
150 200 235 470 95 190 175 350 21 42
200 250 255 510 105 210 189 378 23 46
250 300 270 540 110 220 201 402 24 48
300 400 295 590 120 240 221 442 27 54
400 500 320 640 130 260 238 476 29 58
500 600 340 680 135 270 253 506 31 62
600 700 355 710 145 290 266 532 32 64
700 800 375 750 150 300 278 556 33 66
800 900 390 780 155 310 289 578 35 70
900 1,000 400 800 160 320 300 600 36 72
1,000 1,200 425 850 165 330 318 636 39 78
1,200 1,400 450 900 170 340 336 672 41 82
1,400 1,600 470 940 175 350 351 702 43 86
1,600 1,800 490 980 180 360 366 732 44 88
1,800 2,000 505 1,010 185 370 378 756 45 90
2,000 2,500 545 1,090 190 380 408 816 49 98
2,500 3,000 580 1,160 195 390 432 864 52 104
3,000 4,000 635 1,270 210 420 474 948 58 116
4,000 5,000 685 1,370 225 450 513 1,026 61 122
5,000 6,000 730 1,460 235 470 546 1,092 65 130
6,000 7,000 770 1,540 245 490 573 1,146 68 136
7,000 8,000 800 1,600 250 500 600 1,200 72 144
8,000 9,000 835 1,670 255 510 624 1,248 75 150
9,000 10,000 865 1,730 260 520 645 1,290 78 156
10,000 12,000 875 1,750 270 540 687 1,374 82 164
12,000 14,000 885 1,770 275 550 723 1,446 87 174
14,000 16,000 900 1,800 280 560 756 1,512 90 180
16,000 18,000 940 1,880 285 570 786 1,572 94 188
18,000 20,000 975 1,950 290 580 813 1,626 98 196
20,000 25,000 1,055 2,000 315 630 876 1,752 105 210
25,000 30,000 1,130 2,000 340 680 933 1,866 112 224
30,000 35,000 1,205 2,000 360 720 981 1,962 119 238
35,000 40,000 1,275 2,000 380 760 1,026 2,000 124 248
40,000 45,000 1,340 2,000 400 800 1,068 2,000 129 258
45,000 50,000 1,400 2,000 420 840 1,104 2,000 135 270
50,000 55,000 1,460 2,000 440 880 1,140 2,000 140 280
55,000 60,000 1,515 2,000 455 910 1,173 2,000 145 290
60,000 65,000 1,565 2,000 470 940 1,206 2,000 150 300
65,000 70,000 1,610 2,000 485 970 1,236 2,000 155 310
70,000 75,000 1,655 2,000 500 1,000 1,263 2,000 160 320
75,000 80,000 1,695 2,000 510 1,020 1,293 2,000 165 330
80,000 85,000 1,730 2,000 520 1,040 1,317 2,000 170 340
85,000 90,000 1,760 2,000 530 1,060 1,344 2,000 175 350
90,000 95,000 1,790 2,000 540 1,080 1,368 2,000 180 360
95,000 100,000 1,815 2,000 545 1,090 1,392 2,000 185 370
100,000 110,000 1,835 2,000 550 1,100 1,437 2,000 195 390
110,000 120,000 1,855 2,000 555 1,110 1,479 2,000 205 410
120,000 130,000 1,875 2,000 560 1,120 1,521 2,000 215 430
130,000 140,000 1,890 2,000 565 1,130 1,557 2,000 225 450
140,000 150,000 1,900 2,000 570 1,140 1,593 2,000 235 470
150,000 160,000 1,935 2,000 580 1,160 1,629 2,000 245 490
160,000 170,000 1,965 2,000 590 1,180 1,662 2,000 255 510
170,000 180,000 1,990 2,000 600 1,200 1,695 2,000 265 530
180,000 190,000 2,010 2,010 605 1,210 1,725 2,000 275 550
190,000 200,000 2,030 2,030 610 1,220 1,755 2,000 285 570
200,000 210,000 2,055 2,055 620 1,240 1,782 2,000 295 590
210,000 230,000 2,100 2,100 635 1,270 1,836 2,000 315 630
230,000 250,000 2,155 2,155 650 1,300 1,890 2,000 335 670
250,000 275,000 2,215 2,215 670 1,340 1,950 2,000 360 720
275,000 300,000 2,275 2,275 690 1,380 2,000 2,000 385 770--------------------------------------------------------------------------------------------------------------------------------------------------------
Table: American Table of Distances for Storage of Explosives (December
1910), as Revised and Approved by the Institute of Makers of
Explosives--July, 1991.
Notes to the Table of Distances for Storage of Explosives
(1) Terms found in the table of distances for storage of explosive materials are defined in Sec. 555.11.
(2) When two or more storage magazines are located on the same property, each magazine must comply with the minimum distances specified from inhabited buildings, railways, and highways, and, in addition, they should be separated from each other by not less than the distances shown for ``Separation of Magazines,'' except that the quantity of explosives contained in cap magazines shall govern in regard to the spacing of said cap magazines from magazines containing other explosives. If any two or more magazines are separated from each other by less than the specified ``Separation of Magazines'' distances, then such two or more magazines, as a group, must be considered as one magazine, and the total quantity of explosives stored in such group must be treated as if stored in a single magazine located on the site of any magazine of the group, and must comply with the minimum of distances specified from other magazines, inhabited buildings, railways, and highways.
(3) All types of blasting caps in strengths through No. 8 cap should be rated at 1\1/2\ lbs. (1.5 lbs.) of explosives per 1,000 caps. For strengths higher than No. 8 cap, consult the manufacturer.
(4) For quantity and distance purposes, detonating cord of 50 or 60 grains per foot should be calculated as equivalent to 9 lbs. of high explosives per 1,000 feet. Heavier or lighter core loads should be rated proportionately. [T.D. ATF-87, 46 FR 40384, Aug. 7, 1981, as amended by T.D. ATF-400, 63 FR 45003, Aug. 24, 1998; T.D. ATF-446, 66 FR 16602, Mar. 27, 2001; T.D. ATF-446a, 66 FR 19089, Apr. 13, 2001]