California Code of Regulations › Title 19 - Public Safety › Division 1 - State Fire Marshal › Chapter 10 - Explosives › Subchapter 6 - Tables of Distances › Article 18 - Explosives › Section 1581 - Table of Distances for Storage of Explosives

Current through Register 2024 Notice Reg. No. 28, July 12, 2024
Explosives
Distances In Feet
								  When Storage Is Barricaded
Pounds Over
Pounds Not Over
Inhabited Buildings
Passenger Railways
Public Highways
Separation of Magazines
2
5
70
30
30
6
5
10
90
35
35
8
10
20
110
45
45
10
20
30
125
50
50
11
30
40
140
55
55
12
40
50
150
60
60
14
50
75
170
70
70
15
75
100
190
75
75
16
100
125
200
80
80
18
125
150
215
85
85
19
150
200
235
95
95
21
200
250
255
105
105
23
250
300
270
110
110
24
300
400
295
120
120
27
400
500
320
130
130
29
500
600
340
135
135
31
600
700
355
145
145
32
700
800
375
150
150
33
800
900
390
155
155
35
900
1,000
400
160
160
36
1,000
1,200
425
170
165
39
1,200
1,400
450
180
170
41
1,400
1,600
470
190
175
43
1,600
1,800
490
195
180
44
1,800
2,000
505
205
185
45
2,000
2,500
545
220
190
49
2,500
3,000
580
235
195
52
3,000
4,000
635
255
210
58
4,000
5,000
685
275
225
61
5,000
6,000
730
295
235
65
6,000
7,000
770
310
245
68
7,000
8,000
800
320
250
72
8,000
9,000
835
335
255
75
9,000
10,000
865
345
260
78
10,000
12,000
875
370
270
82
12,000
14,000
885
390
275
87
14,000
16,000
900
405
280
90
16,000
18,000
940
420
285
94
18,000
20,000
975
435
290
98
20,000
25,000
1,055
470
315
105
25,000
30,000
1,130
500
340
112
30,000
35,000
1,205
525
360
119
35,000
40,000
1,275
550
380
124
40,000
45,000
1,340
570
400
129
45,000
50,000
1,400
590
420
135
50,000
55,000
1,460
610
440
140
55,000
60,000
1,515
630
455
145
60,000
65,000
1,565
645
470
150
65,000
70,000
1,610
660
485
155
70,000
75,000
1,655
675
500
160
75,000
80,000
1,695
690
510
165
80,000
85,000
1,730
705
520
170
85,000
90,000
1,760
720
530
175
90,000
95,000
1,790
730
540
180
95,000
100,000
1,815
745
545
185
100,000
110,000
1,835
770
550
195
110,000
120,000
1,855
790
555
205
120,000
130,000
1,875
810
560
215
130,000
140,000
1,890
835
565
225
140,000
150,000
1,900
850
570
235
150,000
160,000
1,935
870
580
245
160,000
170,000
1,965
890
590
255
170,000
180,000
1,990
905
600
265
180,000
190,000
2,010
920
605
275
190,000
200,000
2,030
935
610
285
200,000
210,000
2,055
955
620
295
210,000
230,000
2,100
980
635
315
230,000
250,000
2,155
1,010
650
335
250,000
275,000
2,215
1,040
670
360
275,000
300,000
2,275
1,075
690
385
Notes to Table of Distances for Storage of
						Explosives
NOTE:
1
--"Barricaded" means that a building
						containing explosives is effectually screened from a magazine, building,
						railway, or highway, either by a natural barricade, or by an artificial
						barricade of such height that a straight line from the top of any sidewall of
						the building containing explosives to the eave line of any magazine, or
						building, or to a point twelve feet above the center of a railway or highway,
						will pass through such intervening natural or artificial barricade.
NOTE:
2
--"Natural Barricade" means natural
						features of the ground, such as hills, or timber of sufficient density that the
						surrounding exposures which require protection cannot be seen from the magazine
						when the trees are bare of leaves.
NOTE:
3
--"Artificial Barricade" means an
						artificial mound or rivetted wall of earth of a minimum thickness of three
						feet.
NOTE:
4
--When a building containing
						explosives is not barricaded, the distances shown in the Table shall be
						doubled.
NOTE:
5
--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.
NOTE:
6
--The permanent storage of more than
						300,000 pounds of commercial explosives in one magazine or in a group of
						magazines which is considered as one magazine is not permitted except by
						specific approval of the enforcing official.
NOTE:
7
--This table applies only to the
						manufacture and permanent storage of commercial explosives. It is not
						applicable to transportation of explosives, or any handling or temporary
						storage necessary or incident thereto. It is not intended to apply to bombs,
						projectiles, or other heavily encased explosives and small quantities in
						commercial establishments.
NOTE:
8
--All types of blasting caps in
						strengths through No. 8 cap shall be rated at 1 ½ pounds of explosives
						per 1,000 caps. For strengths higher than No. 8 cap, consult the chief having
						jurisdiction.
NOTE:
9
--For quantity and distance purposes,
						detonating fuse up to 60 grains per foot, shall be calculated as equivalent to
						nine (9) pounds of high explosives per 1000 feet. Heavier cord loads shall be
						rated proportionally.
1. New
						Article 18 (Section
						1581) filed 3-4-69; effective
						thirtieth day thereafter (Register 69, No. 10).
Note: Authority cited: Section
						  12081,
						  Health and Safety Code, Reference: Sections
						  12000-12401 inclusive, Health and
						  Safety Code.