§ 555.218 Table of distances for storage of explosive materials.

  1. Quantity of explosives Distances in feet
    Pounds over Pounds not over Inhabited buildings Public highways with traffic volume of 3000 or fewer vehicles/day Passenger railways—public highways with traffic volume of more than 3,000 vehicles/day Separation of magazines
    Barricaded Unbarricaded Barricaded Unbarricaded Barricaded Unbarricaded Barricaded Unbarricaded
    0570140306051102612
    51090180357064128816
    10201102204590811621020
    203012525050100931861122
    3040140280551101032061224
    4050150300601201102201428
    5075170340701401272541530
    75100190380751501392781632
    100125200400801601503001836
    125150215430851701593181938
    150200235470951901753502142
    2002502555101052101893782346
    2503002705401102202014022448
    3004002955901202402214422754
    4005003206401302602384762958
    5006003406801352702535063162
    6007003557101452902665323264
    7008003757501503002785563366
    8009003907801553102895783570
    9001,0004008001603203006003672
    1,0001,2004258501653303186363978
    1,2001,4004509001703403366724182
    1,4001,6004709401753503517024386
    1,6001,8004909801803603667324488
    1,8002,0005051,0101853703787564590
    2,0002,5005451,0901903804088164998
    2,5003,0005801,16019539043286452104
    3,0004,0006351,27021042047494858116
    4,0005,0006851,3702254505131,02661122
    5,0006,0007301,4602354705461,09265130
    6,0007,0007701,5402454905731,14668136
    7,0008,0008001,6002505006001,20072144
    8,0009,0008351,6702555106241,24875150
    9,00010,0008651,7302605206451,29078156
    10,00012,0008751,7502705406871,37482164
    12,00014,0008851,7702755507231,44687174
    14,00016,0009001,8002805607561,51290180
    16,00018,0009401,8802855707861,57294188
    18,00020,0009751,9502905808131,62698196
    20,00025,0001,0552,0003156308761,752105210
    25,00030,0001,1302,0003406809331,866112224
    30,00035,0001,2052,0003607209811,962119238
    35,00040,0001,2752,0003807601,0262,000124248
    40,00045,0001,3402,0004008001,0682,000129258
    45,00050,0001,4002,0004208401,1042,000135270
    50,00055,0001,4602,0004408801,1402,000140280
    55,00060,0001,5152,0004559101,1732,000145290
    60,00065,0001,5652,0004709401,2062,000150300
    65,00070,0001,6102,0004859701,2362,000155310
    70,00075,0001,6552,0005001,0001,2632,000160320
    75,00080,0001,6952,0005101,0201,2932,000165330
    80,00085,0001,7302,0005201,0401,3172,000170340
    85,00090,0001,7602,0005301,0601,3442,000175350
    90,00095,0001,7902,0005401,0801,3682,000180360
    95,000100,0001,8152,0005451,0901,3922,000185370
    100,000110,0001,8352,0005501,1001,4372,000195390
    110,000120,0001,8552,0005551,1101,4792,000205410
    120,000130,0001,8752,0005601,1201,5212,000215430
    130,000140,0001,8902,0005651,1301,5572,000225450
    140,000150,0001,9002,0005701,1401,5932,000235470
    150,000160,0001,9352,0005801,1601,6292,000245490
    160,000170,0001,9652,0005901,1801,6622,000255510
    170,000180,0001,9902,0006001,2001,6952,000265530
    180,000190,0002,0102,0106051,2101,7252,000275550
    190,000200,0002,0302,0306101,2201,7552,000285570
    200,000210,0002,0552,0556201,2401,7822,000295590
    210,000230,0002,1002,1006351,2701,8362,000315630
    230,000250,0002,1552,1556501,3001,8902,000335670
    250,000275,0002,2152,2156701,3401,9502,000360720
    275,000300,0002,2752,2756901,3802,0002,000385770

    1. Table: American Table of Distances for Storage of Explosives (December 1910), as Revised and Approved by the Institute of Makers of Explosives—June 1991.
    2. Notes to the Table of Distances for Storage of Explosives
    3. (1) Terms found in the table of distances for storage of explosive materials are defined in § 555.11.

    4. (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.

    5. (3) All types of blasting caps in strengths through No. 8 cap should be rated at 11/2 lbs. (1.5 lbs.) of explosives per 1,000 caps. For strengths higher than No. 8 cap, consult the manufacturer.

    6. (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.