RCW 70.74.010: Definitions. (2024)

Definitions.

As used in this chapter, unless a different meaning is plainly required by the context:

(1) The terms "authorized," "approved," or "approval" shall be held to mean authorized, approved, or approval by the department of labor and industries.

(2) The term "blasting agent" shall be held to mean and include any material or mixture consisting of a fuel and oxidizer, that is intended for blasting and not otherwise defined as an explosive; if the finished product, as mixed for use or shipment, cannot be detonated by means of a number 8 test blasting cap when unconfined. A number 8 test blasting cap is one containing two grams of a mixture of eighty percent mercury fulminate and twenty percent potassium chlorate, or a blasting cap of equivalent strength. An equivalent strength cap comprises 0.40-0.45 grams of PETN base charge pressed in an aluminum shell with bottom thickness not to exceed 0.03 of an inch, to a specific gravity of not less than 1.4 g/cc., and primed with standard weights of primer depending on the manufacturer.

(3) The term "dealer" shall be held to mean and include any person who purchases explosives or blasting agents for the sole purpose of resale, and not for use or consumption.

(4) The term "efficient artificial barricade" shall be held to mean an artificial mound or properly revetted wall of earth of a minimum thickness of not less than three feet or such other artificial barricade as approved by the department of labor and industries.

(5) The term "explosive" or "explosives" whenever used in this chapter, shall be held to mean and include any chemical compound or mechanical mixture that is commonly used or intended for the purpose of producing an explosion, that contains any oxidizing and combustible units, or other ingredients, in such proportions, quantities, or packing, that an ignition by fire, by friction, by concussion, by percussion, or by detonation of any part of the compound or mixture may cause such a sudden generation of highly heated gases that the resultant gaseous pressures are capable of producing destructive effects on contiguous objects or of destroying life or limb. In addition, the term "explosives" shall include all material which is classified as division 1.1, 1.2, 1.3, 1.4, 1.5, or 1.6 explosives by the United States department of transportation. For the purposes of this chapter, small arms ammunition, small arms ammunition primers, smokeless powder not exceeding fifty pounds, and black powder not exceeding five pounds shall not be defined as explosives, unless possessed or used for a purpose inconsistent with small arms use or other lawful purpose.

(6) Classification of explosives shall include, but not be limited to, the following:

(a) DIVISION 1.1 and 1.2 EXPLOSIVES: Possess mass explosion or detonating hazard and include dynamite, nitroglycerin, picric acid, lead azide, fulminate of mercury, black powder exceeding five pounds, blasting caps in quantities of 1001 or more, and detonating primers.

(b) DIVISION 1.3 EXPLOSIVES: Possess a minor blast hazard, a minor projection hazard, or a flammable hazard and include propellant explosives, including smokeless powder exceeding fifty pounds.

(c) DIVISION 1.4, 1.5, and 1.6 EXPLOSIVES: Include certain types of manufactured articles which contain division 1.1, 1.2, or 1.3 explosives, or all, as components, but in restricted quantities, and also include blasting caps in quantities of 1000 or less.

(7) The term "explosive-actuated power devices" shall be held to mean any tool or special mechanized device which is actuated by explosives, but not to include propellant-actuated power devices.

(8) The term "explosives manufacturing building," shall be held to mean and include any building or other structure (excepting magazines) containing explosives, in which the manufacture of explosives, or any processing involving explosives, is carried on, and any building where explosives are used as a component part or ingredient in the manufacture of any article or device.

(9) The term "explosives manufacturing plant" shall be held to mean and include all lands, with the buildings situated thereon, used in connection with the manufacturing or processing of explosives or in which any process involving explosives 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 manufacture of any article or device.

(10) The term "forbidden or not acceptable explosives" shall be held to mean and include explosives which are forbidden or not acceptable for transportation by common carriers by rail freight, rail express, highway, or water in accordance with the regulations of the federal department of transportation.

(11) The term "fuel" shall be held to mean and include a substance which may react with the oxygen in the air or with the oxygen yielded by an oxidizer to produce combustion.

(12) The term "handloader" shall be held to mean and include any person who engages in the noncommercial assembling of small arms ammunition for his or her own use, specifically the operation of installing new primers, powder, and projectiles into cartridge cases.

(13) The term "handloader components" means small arms ammunition, small arms ammunition primers, smokeless powder not exceeding fifty pounds, and black powder as used in muzzle loading firearms not exceeding five pounds.

(14) The term "highway" shall be held to mean and include any public street, public alley, or public road, including a privately financed, constructed, or maintained road that is regularly and openly traveled by the general public.

(15) The term "improvised device" means a device which is fabricated with explosives or destructive, lethal, noxious, pyrotechnic, or incendiary chemicals and which is designed, or has the capacity, to disfigure, destroy, distract, or harass.

(16) The term "inhabited building," shall be held to mean and include only a building regularly occupied in whole or in part as a habitation for human beings, or any church, schoolhouse, railroad station, store, or other building where people are accustomed to assemble, other than any building or structure occupied in connection with the manufacture, transportation, storage, or use of explosives.

(17) The term "magazine," shall be held to mean and include any building or other structure, other than an explosives manufacturing building, used for the storage of explosives.

(18) The term "motor vehicle" shall be held to mean and include any self-propelled automobile, truck, tractor, semi-trailer or full trailer, or other conveyance used for the transportation of freight.

(19) The term "natural barricade" shall be held to mean and include any natural hill, mound, wall, or barrier composed of earth or rock or other solid material of a minimum thickness of not less than three feet.

(20) The term "oxidizer" shall be held to mean a substance that yields oxygen readily to stimulate the combustion of organic matter or other fuel.

(21) The term "person" shall be held to mean and include any individual, firm, partnership, corporation, company, association, society, joint stock company, joint stock association, and including any trustee, receiver, assignee, or personal representative thereof.

(22) The term "propellant-actuated power device" shall be held to mean and include any tool or special mechanized device or gas generator system which is actuated by a propellant or which releases and directs work through a propellant charge.

(23) The term "public conveyance" shall be held to mean and include any railroad car, streetcar, ferry, cab, bus, airplane, or other vehicle which is carrying passengers for hire.

(24) The term "public utility transmission system" shall mean power transmission lines over 10 KV, telephone cables, or microwave transmission systems, or buried or exposed pipelines carrying water, natural gas, petroleum, or crude oil, or refined products and chemicals, whose services are regulated by the utilities and transportation commission, municipal, or other publicly owned systems.

(25) The term "purchaser" shall be held to mean any person who buys, accepts, or receives any explosives or blasting agents.

(26) The term "pyrotechnic" shall be held to mean and include any combustible or explosive compositions or manufactured articles designed and prepared for the purpose of producing audible or visible effects which are commonly referred to as fireworks as defined in chapter 70.77 RCW.

(27) The term "railroad" shall be held to mean and include any steam, electric, or other railroad which carries passengers for hire.

(28) The term "small arms ammunition" shall be held to mean and include any shotgun, rifle, pistol, or revolver cartridge, and cartridges for propellant-actuated power devices and industrial guns. Military-type ammunition containing explosive bursting charges, incendiary, tracer, spotting, or pyrotechnic projectiles is excluded from this definition.

(29) The term "small arms ammunition primers" shall be held to mean small percussion-sensitive explosive charges encased in a cup, used to ignite propellant powder and shall include percussion caps as used in muzzle loaders.

(30) The term "smokeless powder" shall be held to mean and include solid chemicals or solid chemical mixtures in excess of fifty pounds which function by rapid combustion.

(31) The term "user" shall be held to mean and include any natural person, manufacturer, or blaster who acquires, purchases, or uses explosives as an ultimate consumer or who supervises such use.

Words used in the singular number shall include the plural, and the plural the singular.

RCW 70.74.010: Definitions. (2024)

FAQs

What is no 8 blasting cap? ›

A number 8 test blasting cap is one containing two grams of a mixture of eighty percent mercury fulminate and twenty percent potassium chlorate, or a blasting cap of equivalent strength.

What is in a blasting cap? ›

The term "blasting cap" means a small metal tube or shell closed at one end, loaded with a detonating charge, whose minimum strength shall be equivalent to one gram of 80% mercury fulminate and 20% potassium chlorate mixture, used in detonating high explosives.

What are the 3 types of explosives? ›

1. Introduction
  • blasting and bulk explosives (explosives used for commercial blasting applications or for their manufacture); ...
  • perforating explosives (intended for use in the oil and gas well industry); ...
  • special-application explosives (high explosives used for other applications, including primary explosives).
Apr 27, 2020

What is the K factor in blasting? ›

K-factor – A scaling factor correlating the distance (D) and Net Explosive Weight (W) with a particular peak incident overpressure based on the Kingery-Bulmash relationship, as shown in Figure 1.

How many grains in a blasting cap? ›

Many types of Primacord are available for both military and commercial use, but the industrial varieties generally contain from 25 to 60 grains of PETN per 0.3 metre. RDX is sometimes used in place of PETN for high temperatures, because the melting points are, respectively, 203.5° and 140° C (398.3° and 284° F).

What are the three ingredients for an explosion? ›

To create a simple explosion requires three essential ingredients: a means of ignition, a fuel source, and oxygen to support the rapid combustion, which, if confined, will produce an explosion.

What is misfire in blasting? ›

A misfire results when explosives fail to detonate as planned during a mine blast. Accidental detonation of misfires is a frequent cause of personal injury, equipment damage, and lost production.

What are the 5 requirements for an explosion? ›

The 5 Elements Of A Combustible Dust Explosion
  • Combustible Dust.
  • Distribution Of Dust Particles.
  • Confined Dust Cloud.
  • Oxygen.
  • Ignition Source.

What is a Class 4 explosive? ›

Class 4 - Flammable solids; Substances liable to spontaneous combustion; Substances which, on contact with water, emit flammable gases.

What is a division 1.1 1.2 or 1.3 material? ›

Division 1.1: Substances and articles which have a mass explosion hazard. Division 1.2: Substances and articles which have a projection hazard but not a mass explosion hazard. Division 1.3: Substances and articles which have a fire hazard and either a minor blast hazard or a minor projection hazard or both.

What is K factor and Y factor? ›

Y factor and K factor represent part constants used in formulas to calculate the developed length of flat sheet metal required to make a bend of a specific radius and angle in a design. Y factor and K factor are defined by the location of the sheet metal material's neutral bend line with respect to the thickness.

What does 1.5 blasting agents mean? ›

Division 1.5 (Blasting Agents). Consists of very insensitive explosives. This division is comprised of substances which have a mass explosion hazard, but are so insensitive that there is very little probability of initiation or of transition from burning to detonation under normal conditions of transport.

Why is it called K factor? ›

K Factor is a metric for app developers that reveals your app's virality, by measuring how many additional users each of your existing users brings along to the app. The term K Factor actually comes from the world of medicine, where it's used as a metric to measure how quickly a virus spreads.

What is No 8 detonator? ›

Standard type Plain Detonator No. 8 consists of base charge of high explosive and a primary charge of an initiating explosive pressed in to an aluminum tube. It is used with safety fuse.
...
DETONATOR.
Length of Aluminum casing38 mm (Nominal)
UseIn combination with safety fuse
1 more row

What are the types of blasting caps? ›

They are of two types: (1) the so-called regular delay, which has been in use since the early 1900s, and (2) the short-interval, or millisecond, delay, which was introduced about 1943. Except for a delay element placed between the ignition and primer charges, they are the same as instantaneous electric caps.

What is a M6 blasting cap? ›

The current Army M6 electric blasting cap (DODIC M130) are used to initiate high explosives with suitable source of electric power. M6 blasting caps are used to detonate standard military explosives (C-4, TNT, etc.) and is used during combat and on firing ranges during training.

How many amps will a blasting cap set? ›

Blasting Caps are designed to have a minimum firing current of 0.25 amps.

What does C4 bomb stand for? ›

C4 stands for Composition 4, which is part of Composition C. This consists of U.S. explosives made up of mostly RDX. With this type of explosive, a plastic binder material is combined with explosive chemicals. On top of RDX, C4 is made up of motor oil.

Can C4 explode without a detonator? ›

C-4 cannot be detonated by a gunshot or by dropping it onto a hard surface. It does not explode when set on fire or exposed to microwaves. Detonation can be initiated only by a shockwave, such as when a detonator inserted into it is fired.

What are types of detonators? ›

There are three categories of electrical detonators: instantaneous electrical detonators (IED), short period delay detonators (SPD) and long period delay detonators (LPD).

How many CFM shot blasting? ›

An air compressor which produces between 10CFM – 20 CFM is ideal for smaller sandblasting tasks. While a compressor which produces between 18CFM to 35 CFM is better for larger jobs where a more powerful experience is needed. While an industrial type of sandblasting needs a CFM of 50 – 100.

How many volts does it take to set off a blasting cap? ›

Electric blasting caps can be fired from a 11/2 volt flashlight cell. It would be desirable to increase this voltage requirement to reduce the susceptibility of the cap to be prematurely initiated by extraneous electricity.

Can you set off dynamite with a blasting cap? ›

Blasting caps are used to detonate an explosive charge. Blasting caps contain a small explosive charge that in turn sets off a larger attached explosive (such as dynamite).

Is a blasting cap a detonator? ›

(9) "Detonator" means igniters, blasting caps, electric blasting caps, or similar devices used to explode explosives.

Why are blasting holes plugged at the top? ›

The main purpose is to block the chemical output gasses those are effective source of fragmentation in blasting within the blast hole. Stemming plugs are placed in the stemming zone of the blast hole to increase the containment of the explosive gasses.

What is the safe distance for blasting? ›

Hence, though Indian Regulations Prescribe 500 Meters as the safety distance for Blasting, Regulation 164 of Metaliferrous Mines Regulations of Government of India, allows blasting with certain conditions within the safety distance.

How do you calculate scaled distance in blasting? ›

This scaled distance is defined as follows:(1) S D = D / W d where SD is the scaled distance (m/kg0.5), D is the absolute distance between the shot and the station (m), and Wd is the maximum explosive charge per delay (kg).

How do you calculate volume of a blast? ›

Page 3
  1. BH + SD. Charge length (C) =
  2. L - SL. Blast volume (V) =
  3. B x S x BH x N. Blasted tonnes (T) =
  4. V x Density of rock in t/m3. Volume of blasthole (Vb) =
  5. π x D2/4000 x L. ...
  6. PF (kg/m3) = ...
  7. blasted (for kg/Tonne, divided by blasted tonnes T) ...
  8. AWS of explosive/AWS of ANFO x 100.

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