B = Barricaded
U = Unbarricaded
| Quantity of Explosives - Pounds over | Quantity of Explosives - Pounds not over | Inhabited Buildings - Barricaded | Inhabited Buildings - Unbarricaded | Public highways with traffic volume 3000 or fewer vehicles/day - Barricaded | Public highways with traffic volume 3000 or fewer vehicles/day - Unbarricaded | Passenger railways & public highways with traffic volume more than 3,000 vehicles/day - Barricaded | Passenger railways & public highways with traffic volume more than 3,000 vehicles/day - Unbarricaded | Separation of magazines - Barricaded | Separation of magazines - Unbarricaded |
|---|---|---|---|---|---|---|---|---|---|
| 0 | 5 | 70 ft | 140 ft | 30 ft | 60 ft | 51 ft | 102 ft | 6 ft | 12 ft |
| 5 | 10 | 90 ft | 180 ft | 35 ft | 70 ft | 64 ft | 128 ft | 8 ft | 16 ft |
| 10 | 20 | 110 ft | 220 ft | 45 ft | 90 ft | 81 ft | 162 ft | 10 ft | 20 ft |
| 20 | 30 | 125 ft | 250 ft | 50 ft | 100 ft | 93 ft | 186 ft | 11 ft | 22 ft |
| 30 | 40 | 140 ft | 280 ft | 55 ft | 110 ft | 103 ft | 206 ft | 12 ft | 24 ft |
| 40 | 50 | 150 ft | 300 ft | 60 ft | 120 ft | 110 ft | 220 ft | 14 ft | 28 ft |
| 50 | 75 | 170 ft | 340 ft | 70 ft | 140 ft | 127 ft | 254 ft | 15 ft | 30 ft |
| 75 | 100 | 190 ft | 380 ft | 75 ft | 150 ft | 139 ft | 278 ft | 16 ft | 32 ft |
| 100 | 125 | 200 ft | 400 ft | 80 ft | 160 ft | 150 ft | 300 ft | 18 ft | 36 ft |
| 125 | 150 | 215 ft | 430 ft | 85 ft | 170 ft | 159 ft | 318 ft | 19 ft | 38 ft |
| 150 | 200 | 235 ft | 470 ft | 95 ft | 190 ft | 175 ft | 350 ft | 21 ft | 42 ft |
| 200 | 250 | 255 ft | 510 ft | 105 ft | 210 ft | 189 ft | 378 ft | 23 ft | 46 ft |
| 250 | 300 | 270 ft | 540 ft | 110 ft | 220 ft | 201 ft | 402 ft | 24 ft | 48 ft |
| 300 | 400 | 295 ft | 590 ft | 120 ft | 240 ft | 221 ft | 442 ft | 27 ft | 54 ft |
| 400 | 500 | 320 ft | 640 ft | 130 ft | 260 ft | 238 ft | 476 ft | 29 ft | 58 ft |
| 500 | 600 | 340 ft | 680 ft | 135 ft | 270 ft | 253 ft | 506 ft | 31 ft | 62 ft |
| 600 | 700 | 355 ft | 710 ft | 145 ft | 290 ft | 266 ft | 532 ft | 32 ft | 64 ft |
| 700 | 800 | 375 ft | 750 ft | 150 ft | 300 ft | 278 ft | 556 ft | 33 ft | 66 ft |
| 800 | 900 | 390 ft | 780 ft | 155 ft | 310 ft | 289 ft | 578 ft | 35 ft | 70 ft |
| 900 | 1,000 | 400 ft | 800 ft | 160 ft | 320 ft | 300 ft | 600 ft | 36 ft | 72 ft |
| 1,000 | 1,200 | 425 ft | 850 ft | 165 ft | 330 ft | 318 ft | 636 ft | 39 ft | 78 ft |
| 1,200 | 1,400 | 450 ft | 900 ft | 170 ft | 340 ft | 336 ft | 672 ft | 41 ft | 82 ft |
| 1,400 | 1,600 | 470 ft | 940 ft | 175 ft | 350 ft | 351 ft | 702 ft | 43 ft | 86 ft |
| 1,600 | 1,800 | 490 ft | 980 ft | 180 ft | 360 ft | 366 ft | 732 ft | 44 ft | 88 ft |
| 1,800 | 2,000 | 505 ft | 1,010 ft | 185 ft | 370 ft | 378 ft | 756 ft | 45 ft | 90 ft |
| 2,000 | 2,500 | 545 ft | 1,090 ft | 190 ft | 380 ft | 408 ft | 816 ft | 49 ft | 98 ft |
| 2,500 | 3,000 | 580 ft | 1,160 ft | 195 ft | 390 ft | 432 ft | 864 ft | 52 ft | 104 ft |
| 3,000 | 4,000 | 635 ft | 1,270 ft | 210 ft | 420 ft | 474 ft | 948 ft | 58 ft | 116 ft |
| 4,000 | 5,000 | 685 ft | 1,370 ft | 225 ft | 450 ft | 513 ft | 1,026 ft | 61 ft | 122 ft |
| 5,000 | 6,000 | 730 ft | 1,460 ft | 235 ft | 470 ft | 546 ft | 1,092 ft | 65 ft | 130 ft |
| 6,000 | 7,000 | 770 ft | 1,540 ft | 245 ft | 490 ft | 573 ft | 1,146 ft | 68 ft | 136 ft |
| 7,000 | 8,000 | 800 ft | 1,600 ft | 250 ft | 500 ft | 600 ft | 1,200 ft | 72 ft | 144 ft |
| 8,000 | 9,000 | 835 ft | 1,670 ft | 255 ft | 510 ft | 624 ft | 1,248 ft | 75 ft | 150 ft |
| 9,000 | 10,000 | 865 ft | 1,730 ft | 260 ft | 520 ft | 645 ft | 1,290 ft | 78 ft | 156 ft |
| 10,000 | 12,000 | 875 ft | 1,750 ft | 270 ft | 540 ft | 687 ft | 1,374 ft | 82 ft | 164 ft |
| 12,000 | 14,000 | 885 ft | 1,770 ft | 275 ft | 550 ft | 723 ft | 1,446 ft | 87 ft | 174 ft |
| 14,000 | 16,000 | 900 ft | 1,800 ft | 280 ft | 560 ft | 756 ft | 1,512 ft | 90 ft | 180 ft |
| 16,000 | 18,000 | 940 ft | 1,880 ft | 285 ft | 570 ft | 786 ft | 1,572 ft | 94 ft | 188 ft |
| 18,000 | 20,000 | 975 ft | 1,950 ft | 290 ft | 580 ft | 813 ft | 1,626 ft | 98 ft | 196 ft |
| 20,000 | 25,000 | 1,055 ft | 2,000 ft | 315 ft | 630 ft | 876 ft | 1,752 ft | 105 ft | 210 ft |
| 25,000 | 30,000 | 1,130 ft | 2,000 ft | 340 ft | 680 ft | 933 ft | 1,866 ft | 112 ft | 224 ft |
| 30,000 | 35,000 | 1,205 ft | 2,000 ft | 360 ft | 720 ft | 981 ft | 1,962 ft | 119 ft | 238 ft |
| 35,000 | 40,000 | 1,275 ft | 2,000 ft | 380 ft | 760 ft | 1,026 ft | 2,000 ft | 124 ft | 248 ft |
| 40,000 | 45,000 | 1,340 ft | 2,000 ft | 400 ft | 800 ft | 1,068 ft | 2,000 ft | 129 ft | 258 ft |
| 45,000 | 50,000 | 1,400 ft | 2,000 ft | 420 ft | 840 ft | 1,104 ft | 2,000 ft | 135 ft | 270 ft |
| 50,000 | 55,000 | 1,460 ft | 2,000 ft | 440 ft | 880 ft | 1,140 ft | 2,000 ft | 140 ft | 280 ft |
| 55,000 | 60,000 | 1,515 ft | 2,000 ft | 455 ft | 910 ft | 1,173 ft | 2,000 ft | 145 ft | 290 ft |
| 60,000 | 65,000 | 1,565 ft | 2,000 ft | 470 ft | 940 ft | 1,206 ft | 2,000 ft | 150 ft | 300 ft |
| 65,000 | 70,000 | 1,610 ft | 2,000 ft | 485 ft | 970 ft | 1,236 ft | 2,000 ft | 155 ft | 310 ft |
| 70,000 | 75,000 | 1,655 ft | 2,000 ft | 500 ft | 1,000 ft | 1,263 ft | 2,000 ft | 160 ft | 320 ft |
| 75,000 | 80,000 | 1,695 ft | 2,000 ft | 510 ft | 1,020 ft | 1,293 ft | 2,000 ft | 165 ft | 330 ft |
| 80,000 | 85,000 | 1,730 ft | 2,000 ft | 520 ft | 1,040 ft | 1,317 ft | 2,000 ft | 170 ft | 340 ft |
| 85,000 | 90,000 | 1,760 ft | 2,000 ft | 530 ft | 1,060 ft | 1,344 ft | 2,000 ft | 175 ft | 350 ft |
| 90,000 | 95,000 | 1,790 ft | 2,000 ft | 540 ft | 1,080 ft | 1,368 ft | 2,000 ft | 180 ft | 360 ft |
| 95,000 | 100,000 | 1,815 ft | 2,000 ft | 545 ft | 1,090 ft | 1,392 ft | 2,000 ft | 185 ft | 370 ft |
| 100,000 | 110,000 | 1,835 ft | 2,000 ft | 550 ft | 1,100 ft | 1,437 ft | 2,000 ft | 195 ft | 390 ft |
| 110,000 | 120,000 | 1,855 ft | 2,000 ft | 555 ft | 1,110 ft | 1,479 ft | 2,000 ft | 205 ft | 410 ft |
| 120,000 | 130,000 | 1,875 ft | 2,000 ft | 560 ft | 1,120 ft | 1,521 ft | 2,000 ft | 215 ft | 430 ft |
| 130,000 | 140,000 | 1,890 ft | 2,000 ft | 565 ft | 1,130 ft | 1,557 ft | 2,000 ft | 225 ft | 450 ft |
| 140,000 | 150,000 | 1,900 ft | 2,000 ft | 570 ft | 1,140 ft | 1,593 ft | 2,000 ft | 235 ft | 470 ft |
| 150,000 | 160,000 | 1,935 ft | 2,000 ft | 580 ft | 1,160 ft | 1,629 ft | 2,000 ft | 245 ft | 490 ft |
| 160,000 | 170,000 | 1,965 ft | 2,000 ft | 590 ft | 1,180 ft | 1,662 ft | 2,000 ft | 255 ft | 510 ft |
| 170,000 | 180,000 | 1,990 ft | 2,000 ft | 600 ft | 1,200 ft | 1,695 ft | 2,000 ft | 265 ft | 530 ft |
| 180,000 | 190,000 | 2,010 ft | 2,010 ft | 605 ft | 1,210 ft | 1,725 ft | 2,000 ft | 275 ft | 550 ft |
| 190,000 | 200,000 | 2,030 ft | 2,030 ft | 610 ft | 1,220 ft | 1,755 ft | 2,000 ft | 285 ft | 570 ft |
| 200,000 | 210,000 | 2,055 ft | 2,055 ft | 620 ft | 1,240 ft | 1,782 ft | 2,000 ft | 295 ft | 590 ft |
| 210,000 | 230,000 | 2,100 ft | 2,100 ft | 635 ft | 1,270 ft | 1,836 ft | 2,000 ft | 315 ft | 630 ft |
| 230,000 | 250,000 | 2,155 ft | 2,155 ft | 650 ft | 1,300 ft | 1,890 ft | 2,000 ft | 335 ft | 670 ft |
| 250,000 | 275,000 | 2,215 ft | 2,215 ft | 670 ft | 1,340 ft | 1,950 ft | 2,000 ft | 360 ft | 720 ft |
| 275,000 | 300,000 | 2,275 ft | 2,275 ft | 690 ft | 1,380 ft | 2,000 ft | 2,000 ft | 385 ft | 770 ft |
All types of blasting caps in strengths through No. 8 cap should be rated at 1 ½ lbs. (1.5 lbs.) of explosives per 1,000 caps. For strengths higher than No. 8 cap, consult the manufacturer.
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.
Last Updated:
January 26, 2026
