The Philippines, Occupational Safety and Health Standards
RULE
1140
EXPLOSIVES
Source:
Occupational Safety and Health Standards (As Amended).
Bureau of Working Conditions, Department of Labour and
Employment, Manila, Philippines. Second Publication, as amended,
1990. Copyright Reserved per P.D. 49
RULE 1140
1141 : General Provisions:
1141.01:
The provisions of this Rule shall apply to the manufacture,
handling and storage of explosives, fireworks and other
pyrotechnic products.
1141.02:
For the transportation of explosives outside of the plant site,
the Fire Code of the Philippines shall apply.
1141.03: Rule 20 of the Fire Code of the Philippines on Storage
of Explosives is adopted.
1142 : Definitions:
(1) "Explosives" shall mean and include any chemical compound
or.other substances intended for the purpose of
producing
an explosion or that which contains oxidizing or
combustible unit or other ingredients in such
proportion or
quantity that ignition by fire, friction, concussion or
detonation may produce an explosion capable of causing
injury to persons or damage to property.
(2) "Inhabited Building" shall mean a building regularly
occupied in whole or in part as a habitation for human
beings and includes church, school house, railroad
station,
store or other buildings where people assemble, other
than
buildings in explosive plants.
(3) "Explosives Plant" shall mean and include all lands and the
buildings situated thereon, used in connection with the
manufacturing or processing of explosives or in which
any
process involving explosion is carried on, or the
storage
of explosives thereat, as well as any premises where
explosives are used as a component part or ingredient
in
the manufacturing process.
(4) "Factory or Explosive Budding" shall mean a building or
structure (except magazines) in which explosives are
manufactured or any process involving explosives are
carried on.
(S) "Magazine" shall mean a building or structure, other than
factory building, used exclusively for the storage of
explosives.
(6) "Railway" shall mean and include any steam, diesel,
electric or other railroad or railway for public use.
(7) "Highway" shall mean and include any public street, public
alley, public road, or navigable stream used for
transport.
(8) "Barricaded" means that the 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 eaveline of any magazine or building
containing
explosives to a point 3.70 m. (12 ft.) above the center
of
a railway or highway will pass through such intervening
natural or artificial barricade.
(9) "Natural Barricade" means natural features of the ground
which covers a building from another building, or
timber of
sufficient density that the surrounding exposures which
requires protection cannot be seen from the magazine
when
the trees are without leaves.
(10) "Artificial Barricade" means an artificial mound or
revetted wall of earth of a minimum thickness of one
(I)
meter (3.3 ft.).
1143 : Authorization:
(1) Explosives shall be manufactured, handled or stored only in
approved places.
(2) Building authorized for use in the manufacture of
explosives shall not be used for any other purpose.
(3) Specially approved precautions shall be undertaken where
primary or initiating explosives are manufactured,
handled
or stored in addition to the precautions contained
herein.
1144 : Limitation:
1144.01:
Building in which any quantity of explosives are manufactured,
handled, used or temporarily stored shall be classified as
"explosives buildings". These buildings wherein finished
explosives are kept or are stored for periods exceeding forty
eight (48) hours shall be classified as Magazine ".
1144.02:
Explosives materials used in loading detonators, timing or
priming caps or other similar manufacturing processes shall not
be stored in workrooms wherein people are employed except under
the following conditions:
(1) Where the quantity used for an eight-hour work does not
exceed 45 kgs (100 lbs.). Only this quantity shall be stored in
the workroom at any one time and at a place where it shall be
suitably protected from uncontrolled or irresponsible handling.
Additional supply be brought from the magazine as needed after
the first 45 kgs. (100 lbs.) is processed and transferred to
magazines.
1144.03:
Explosives materials not in the process of manufacturing, use or
leftover in any manufacturing process shall be stored in
magazines.
1144.04: Only a maximum of 136,360 kgs. (300,000 lbs.) or
twenty million
(20,000,000) blasting caps shall be
stored in any one
magazine.
1144.05: Explosives or blasting caps shall not be stored or
kept in any building used
in whole or in part as a
dwelling school, theatre
or any other place of public
assembly.
1145 : Quantity and Distance Tables:
Explosives shall not be kept or stored other than in magazine of
Class I and Class II types.
(1) Table of Distance
All buildings and magazines in explosives plants shall be located
away from inhabited buildings. railways or highways, in
conformity with Rule 1141.03
(2) Precautions:
a. The table of distance applies only to the manufacture and
permanent storage of commercial explosives. It is not
applicable to the transportation, handling or temporary
storage of explosives. It is not intended to apply to
bombs, projectiles or other heavily encased explosives.
b. Where a building containing explosives is not barricaded,
the distance shown shall be doubled.
c. When two (2) or more storage magazines are located on the
same property, each magazine shall comply with the
minimum
distance specified. In addition, they shall be
separated
from each other by not less than the distance shown for
"separation of magazines", except that the
quantity of
explosives contained in cap magazine shall determine
the
spacing.
d. If any two (2) or more magazines are separated from each
other by less than the specified distances, such two or
more magazines shall be considered as one and the total
quantity of explosives stored shall be treated as
stored in
a single magazine with the specified minimum distances
with
other magazines, inhabited buildings, railways.
highways
and navigable streams complied with.
(3) Intra-plant Quantity and Distance Table:
All factory buildings in which explosives are processed, kept or
stored shall be located apart from each other and from other
buildings in the explosives plants and magazines shall be
located away from factory and other buildings in explosives
plants in conformity with Table 15.
4) Precautions to Table 15:
Where a factory building or magazine is effectively barricaded,
the distances specified may be reduced by "one half".
1146 : Storage of Explosives:
1146.01: Class I Explosives:
Class I magazines shall be those containing over 22.5 kgs. (50
lbs.) of explosives. Such magazines shall have no openings except
for ventilation and entrance. It shall be of masonry or metal
construction or a combination of both constructed and maintained
as follows:
(1) Doors - Doors must be kept closed and securely locked at
all times except when opened for the purpose of storing
or
removing explosives or to allow persons authorized to
enter
such magazines.
(2) Signs - The premises on which explosives are kept or stored
must be conspicuously defined and marked by appropriate
signs, such as, EXPLOSIVE-KEEP OFF", legibly
printed
thereon in letters not less than 15 cm. (6 in.) high.
Such
signs must not be placed on magazines but shall be so
located that a bullets passing through the sign will
not
strike the magazine.
(3) Wood - The outside walls shall be of 5 cm. x 10 cm. (2 in.
x 4 in.) studding with a 5 cm. (2 in.) plank or tongued
and
grooved lumber having a nominal size of 2.5 cm. (1 in.)
covered with not less than No. 26 gauge galvanized iron
or
steel on the outside. The inside walls shall be lined
with
tongued and grooved reefers. The space between the
outer
and inner walls shall be filled with dry course sand
(not
crushed stone or gravel) or a weak mixture of cement
mortar. All lumber used shall be well seasoned and free
from loose knots, bark edges or decay.
(4) Brick - Brick walls shall be 20 cm. (8 in.) in thickness of
medium soft variety laid in cement mortar containing
not
over 25% lime.
(5) Concrete - Concrete walls shall be 15 cm. (6 in.) in
thickness constructed of nine (9) parts sand to one (1)
part cement with a 1.25 cm. (1/2 in.) face surface of
three
(3) parts sand to one (1) part cement.
(6) Cement Block - Cement block walls shall be 20 cm. (8 in.)
thick hollow cement block, a mixture of seven (7) parts
sand and one (1) part cement. The spaces in the block
shall
be filled with dry coarse sand (not crushed stone or
gravel) or a weak mixture of cement mortar.
(7) Fabricated Metal - Walls and roof shall consist of
approximately No. 14 gauge metal securely fastened
together. Walls shall be lined with 10 cm. (4 in.) of
brick
of at least a 15 cm. (6 in.3 sand fill between the
interior
and exterior walls.
(8) Lining of Magazines - Lining of magazines as specified in
paragraphs (3) and (7) above, may not be required for
the
storage of black powder or for the storage of not more
than
100,000 pieces of blasting caps.
(9) Foundation - The foundation shall be of stone laid in
concrete, wood posts or brick piers. Magazines of less
than
13,600 kgs. (30,000 lbs.) capacity shall have flooring
of
lumber having a nominal size of 2.5 cm. (1 in.) tongued
and
grooved. Magazines of larger capacity shall have double
flooring.
(10) Ventilation - the floor and ceiling shall be constructed to
within 5 cm. (2 in.) of the walls to provide a 3 cm.
ventilation space. This shall be provided by
constructing
a 2-.5 cm. x 15 cm. (1 in. x 6 in,) lattice wood lining
on
5 cm. x 5 cm. (2 in. x 2 in.) wood stud 60 cm. (2 ft.)
on
centers. Foundation ventilators shall be spaced not
more
than 150 cm. (5 ft.) on center in all sides and
properly
screened to prevent the entrance of sparks of fire.
(11) Nails - All heads of nails shall be countersunk. No spark
producing metal shall be exposed inside the buildings.
(12) Doors - the doors shall be 1 m. (3.28 ft.) wide and 1.8 m.
(6 ft.) high constructed of at least three (3) layers
of
hard wood, having a nominal size of 2.5 cm. (1 in.) and
covered on the outside with a steel sheet of at least
No.
20 gauge. Where there is a need for bullet proofing,
the
thickness of the steel sheet shall be a minimum of 1
cm.
(3/8 in.)
(13) Roof - except where permission for other construction is
approved, a bulletproof sand roof shall be used
constructed
as follows:
Form a box by laying a
floor of a good grade of tongue
and groove boards on
ceiling joists and build a 2.5
cm. x 10 cm. (1 x 4 in.)
rim lined with one (1) layer
of building paper and
filled with 10 cm. (4 in.) of
dry coarse sand.
Except for fabricated metal magazines, the outer roof
shall
be covered with not less than No. 26 gauge galvanized
iron
rige roll fastened to 2.2 cm. (7/8 in.) sheating.
(14) Gutters and Down Spouts - Where water may enter through the
door, gutters and down spouts shall be provided on the
door
sides.
(15) Materials and Workmanship - Only superior materials and
workmanship shall be used.
1146.02: Class II Magazines:
Class II magazines shall be used for storing not more than 22.5
kgs (50 lbs.) of explosives. It shall be of wood or metal
construction or a combination of both.
(1) Construction - The principle of construction is simply that
of placing one box inside of another with a 12.5 cm. (5
in.) space in between filled with dry coarse sand, not
gravel or crushed rock.
(2) Outer Box - The outer box shall be constructed of tongued
and grooved lumber having a nominal size of 2.5 cm. (I
in.)
plain lumber. The outside of the box shall be covered
with
no less than No. 24 gauge iron sheet. The outer box
shall
be 0.33 m. (1 foot) longer, 0.33 m. (1 foot) wider, and
15
cm (6 in.) deeper than the inner box allowing a 12.5
cm. (5
in.) space on all sides for sand filling. The inner box
shall be set inside the outer box with the tops at
level
with each other and fastened into place.
(3) Inner box - The inside of all boxes shall be surfaced No
naiL bolt or metal screw heads shall be exposed on the
inside of the box.
(4) Ventilation - At the top of each box, on the sides and
ends, cut 0.625 cm (1/4 in.) by 5 cm. (2 in.) notches,
spaced about 0.33 m. (1 foot) apart, and not directly
opposite.
(5) Setting - The box (magazine) shall be set in a level
position and supported by either wooden sills, bricks
or
piers and the bottom of the magazine kept at about 15
cm.
(6 in.) off the ground.
(6) Sand Fill - Fill the space between boxes with dry coarse
sand (not gravel or crushed rock) to within 0.625 cm
(1/4
in.) of the top. To prevent sand from falling into the
storage space, a cover may be placed over the sand
space.
(7) Locks - magazines shall be provided with adequate locks.
(8) Signs - At each end and on top of the magazine, above the
side wall and on its barricades, there shall be
conspicuously posted at all times appropriate, signs,
such
as, "MAGAZINE-EXPLOSIVE-DANGEROUS" legibly
printed in
letters not less than 15 cm. (6 in.) high.
1146.03: Temporary Storage At Job Sites:
(1) When used for temporary storage at a job site for blasting
operations, Class II magazines shall be located away
from
neighboring buildings, railways, highways and other
magazines. A distance of at least 45 m. (150 ft.) shall
be
maintained between Class II Magazines and the work site
when the quantity of explosives kept therein is in
excess
of 11.4 kgs. (25 lbs.) and at least 15 m. (50 ft.) when
the
quantity of explosives is 11.4 kgs (25 lbs.) or less.
The
enforcing authority may require greater separation
between
Class II magazines and the work site where conditions
warrant.
(2) Class II portable magazines for transporting small amounts
of explosives from the permanent magazine to the work
site
and for temporary storage in the work site shall be
constructed or built of 5 cm. (2 in.) hardwood or 7.5
cm.
(3 in.) soft wood, well braced at corners, with sheet
metal
exterior sheathing.
1146.04: Existing Magazines:
(1) Magazines existing prior to the promulgation of this
Standards, which comply substantially with the intent
and
purpose of this requirement but not with the detailed
specifications, may be allowed for a period of one
(1)year
subject to the reduction of capacity for the purpose of
complying with the provisions of this Rule. The
Secretary
may require changes as are necessary to come into
compliance, or to reduce magazine capacity in
accordance
with the requirements on construction or distance.
1146.05: Number of Employees:
The number of employees allowed in workrooms or portions of an
explosives plant shall be limited to the minimum requirements of
manufacturing.
1146.06: Admission to Plants:
(1) Explosives plants shall be fenced to prevent the entrance
of person/s.
(2) No person, other than authorized employees or duly
authorized enforcement officers, shall be allowed in
any
explosives plant unless they have been given permission
and
accompanied by the owner or his authorized
representative.
A record of such visits shall be kept on file in the
office
signed in each case by the visitor/agent and the owner/
representative.
1146.07: Approval of Plans:
(1) For purposes of this Rule, the plans of all buildings in
the explosives plant shall be submitted to the
Integrated
National Police for approval copy furnished the
Regional
Labor Office concerned before such buildings are
constructed with the following
a. Maps, plans or sketches of the topographical site showing
the location of plant buildings, highways and also
showing
the existing barricades, if any, and barricades that
are
intended to be used. These plans shall be drawn to a
scale
of 1:2000 meters (100 or 200 feet to an inch) submitted
in
triplicate in white or blue print.
b. Plans and specifications of proposed magazines and other
factory buildings drawn scale of at least 1.50 meters
(1/4
in. to a foot) submitted in triplicate in white or blue
print.
(2) A copy of the approved plans shall be kept in the office of
the plant superintendent of each plant for inspection
by
duly authorized representatives of the Secretary. The
superintendent of each plant shall, upon the demand of
said
representative, furnish the following information.
a. the number of persons ordinarily engaged at work in or at
each building or the maximum number allowed:
b. the maximum amount and kind of explosive materials allowed
and present in each building at one time;
c. the nature and kind of work carried on in each building and
whether or not such buildings are surrounded by natural
or
artificial barricades and dimension of each barricades;
d. record of visits and inspections; and other necessary
information.
1146.08: Certificates of Safety Inspection Fees:
(1) Certificate of safety inspection issued by the Regional
Office shall be required of all explosives plants
showing
compliance with the provisions of this Standards. Such
certificates shall be valid for one (I) year from the
date
issued, renewable annually.
(2) Safety Inspection Fee: Refer to Rule 1970.
1146.09: General Precautions:
(1) Handling and Housekeeping
a. Packages of explosives shall not be opened within 15 m. (50
ft.) of any magazine. Only wooden, rubber, rawhide,
fiber,
zinc or babbitt mallet and wood wedge shall be used in
opening packages of explosives.
b. all premises surrounding magazines must be kept free from
bush, dry grass, and similar growth for at least 7.5 m.
(25
ft.) around and no flammable materials shall be placed
near
or about magazines; and
c. only authorized persons shall have access to magazines.
(2) Lighting:
a. No open or naked lights such as lanterns, stoves and
torches shall be allowed in rooms or portions of
manufacturing plants. Watchmen or others using portable
lighting shall be supplied with electric safety flash
lights or electric safety lanterns.
b. No artificial light shall be used in magazines except
approved portable electric dry cell battery lamps or
lanterns.
c. Rooms or portions of plants shall be lighted, if artificial
light is needed, by means of an electric system
installed
in conduit or in lead encased cables, with vapor proof
lamps. All switches or fuses shall be located in a
protected place away from such rooms or buildings. All
lights, if possible, shall be protected by reflections
into
rooms from the outside. The use of electric motors
other
than those of a sparkless induction type, is
prohibited.
(3) Materials Allowed in Explosives Buildings:
a. all explosives buildings shall be kept clear of all
unnecessary loose tools, refuse and debris of any kind
at
all times, and shall not be used as temporary
storehouse of
materials not necessary in the process of manufacture.
b. explosives buildings, while containing explosives, shall
not be used as storehouse for implements and any other
material.
(4) Matches:
Workers shall not be allowed to carry at all times
inside
explosives plants, any match or other flame-producing
device, unless he is authorized in writing by the plant
superintendent. In such case, only safety matches shall
be
used and such entry and authorization properly recorded
and
open for inspection.
(5) Clothing of Employees:
a. all employees handling loose explosive or working in or
around buildings used for manufacturing explosives
shall
wear lubber soled shoes without iron or steel nails and
with no metal attachments.
b. all explosives buildings shall be provided al each entrance
with suitable device whereby the shoes of all persons
entering Such buildings can be cleaned.
(6) Change or Locker House.
Suitable change or locker houses shall be provided
where
employees can wash and change their clothes. No lockers
shall be allowed in explosives buildings.
(7) Transportation, Machinery and Platforms.
a. all trucks or conveyors used for the transportation of
loose explosives materials, except smokeless powder not
in
dry state or wet nitro compounds, shall be provided
with
side or end rails or guards to prevent any
concentration of
explosives from slipping off the truck.
b. careful inspection shall be made daily by the plant foreman
to see that all machinery and equipment used in the
manufacture or handling of explosives are in perfect
order.
If any is found nol in good order, it shall not be used
until placed in perfect condition.
c. all dangerous machinery and moving parts of machinery shall
be guarded.
d. all platforms, stairways, tanks, vats, runways, and other
dangerous places shall he guarded by standard railings
and
toeboards Where there is danger of dust collection,
toeboards shall not be used. Metals shall not be used
for
railings and toeboards where its presence increase the
danger of an explosion. No railings or toeboards shall
be
installed that will interfere with safety exits.
e. the tread of all wheels on trucks or conveyors or the rails
used inside the explosives buildings shall be of
non-sparkling materials.
(8) Hand Carrying of Explosives:
When explosives are carried from one building to
another or
from magazines to workrooms, employees carrying such
explosives shall not be allowed to follow each other
closely but must allow an interval of at least one (1)
minute in time or 30 m. (110 ft.) in distance.
(9) Cleanliness:
a. if any explosive material or ingredient is spilled, it
shall be cleaned immediately.
b. all floors of explosives buildings shall be free, as much
as possible, from cracks, openings for any
irregularities.
No projecting or visible iron or steel nails shall be
permitted on such floors.
1146.10: Protection Against Lightning:
(1) Lightning protection shall be provided for all electric
conduits and circuits entering explosives buildings by
means of suitable lightning arresters installed outside
the
buildings.
(2) Unless otherwise approved by the Regional Director
recommended lightning protection for magazine shall be
constructed as follows:
a. Magazine for 2,270 kgs. (5,000 lbs. ) or less:
A vertical conductor of 2 cm. x 0.3 cm. (3/4 in. x 1/8
in.)
copper tape attached to a vertical pole which shall be
installed so that the horizontal distance between the
conductor and the nearest part of the magazine shall
not be
less than 1.2 m. (4 ft.). Joints in the conductor shall
be
tinned and riveted with 0.47 cm. (3/16 in.) copper
rivet.
The conductor shall terminate at least 3 m. (10 ft.)
higher
than the highest point of the magazine. The lower end
of
the conductor shall be attached to a point of at least
7.5
cm. (3 in.) above ground level by 0.47 cm. (3/16 in.)
copper rivets to one or more copper rods 2 cm. (3/4
in.) in
diameter which have been driven vertically into the
ground
to a depth of at least 3 m. (10 ft.). The resistance to
earth shall be less than 10 ohms.
b. Magazine for 2,2 70 kgs (5, 000 lbs. ) explosive or more:
Masts shall be erected at each end of the longer axis
of
the magazine and at least 0.33 m. (1 foot) from any
part of
the magazine. Copper tape 2 cm. x 0.3 cm. (3/4 in. x
1/8
in.) shall be attached to the mast. The conductor shall
terminate at least 0.33 m. (1 foot) above the top of
the
mast and at a point of at least 7.5 cm. (3 in.) above
ground level attached by 2 cm. (3/4 in.) in diameter
copper
rods which have been driven at least 3 m. (10 ft.)
vertically into the ground. An aerial of 2 cm. x 0.3
cm.
(3/4) in. x 1/8 in.) copper tape shall be suspended
between
the masts so that it is either horizontal or curved
upwards
in the middle and is at least 3 m. (10 ft.) higher than
the
highest part of the magazines. The aerial shall be
attached
to the copper tape conductors by 2 cm. (3/4 in.) copper
rivets and binds of at least 0.6 m. (2 ft.) radius.
Joints
in the aerial and vertical conductors shall be tinned
and
riveted with 2 cm. (3/4 in.) copper rivets. The
resistance
to earth shall be less than 10 ohms.
c. Method of Determining the Resistance to Earth:
The use of megger "Earth Tester" or similar
instrument is
recommended.
d. Earth Termination:
Where the nature of the ground makes the driving of the
earth rods impossible, other construction providing the
same resistance to earth may be allowed by the
enforcing
authority.
1147 : Records of Disposition of Explosives:
Every person, firm, association, or corporation manufacturing,
selling, giving away, or distributing explosives, shall keep at
all times an accurate journal or record in which purchase of
explosives powder and every sale or disposition of explosives are
legibly entered. Such record must show the names and addresses
of persons to whom sales or dispositions were made, name of
persons to whom delivered, and the nature of business or persons
receiving the same. Other pertinent data shall be furnished the
Integrated National Police or its authorized representative, copy
furnished the Regional Labor Office.
TABLE 15
TABLE OF DISTANCES FOR STORAGE OF EXPLOSIVES
DISTANCES IN FEET
EXPLOSIVES WHEN STORAGE IS
BARRICADED
______________________________________________________________
Separation
Pounds Inhabited Passenger
Public of
Pounds Not
Build- Railways
high- Maga-
Over
Over ing
ways zines
_______________________________________________________________
2
6
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
180
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 63
______________________________________________________________
DISTANCES IN FEET
EXPLOSIVES WHEN STORAGE IS
BARRICADED
______________________________________________________________
Separation
Pounds Inhabited Passenger
Public of
Pounds
Not Build-
Railways high- Maga-
Over
Over ing
ways zines
_______________________________________________________________
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
1,840
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
_______________________________________________________________
TABLE 15a
INTRA-PLANT QUANTITY AND DISTANCE TABLE
Explosives
Distance Feet
Separate building or within
Pounds Over Pounds Not
Over substantial dividing walls
10
10
40
25
25
60
50
50
80
50
100
80
100
200
100
200
300
120
300
400
130
400
500
140
500
750
160
750
1,000
180
1,000
1,500
210
1,500
2,000
230
2,000
3,000
260
3,000
4,000
280
4,000
5,000
300
5,000
6,000
320
6,000
7,000
340
7,000
8,000
360
8,000
9,000
380
9,000
10,000
400
10,000
12,500
420
12,500
15,000
450
15,000
17,500
470
17,500
20,000
490
20,000
25,000
530
25,000
30,000
560
30,000
35,000
590
35,000
40,000
620
40,000
45,000
640
45,000
50,000
660
50,000
55,000
680
55,000
60,000
700
60,000
65,000
720
65,000
70,000
740
70,000
75,000
770
75,000
80,000
780
80,000
85,000
790
85,000
90,000
800
90,000
95,000
820
95,000
100,000
830
100,000
125,000
900
125,000
150,000
950
150,000
175,000
1,000
175,000
200,000
1,050
200,000
225,000
1,100
225,000
250,000
1,150
The International Labour Organization is a United Nations specialized agency.