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Subchapter 7. General Industry Safety Orders
Group 2. Safe Practices and Personal Protection
Article 10.1. Personal Protective Clothing and Equipment for Fire Fighters
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§3402. Definitions.

After-Flame. The time a test specimen continues to flame after the flame source has been removed. (When subjected to flame resistance test.)

After-Glow. The time a test specimen continues to glow after it has ceased to flame. (When subjected to flame resistance test.)

Break-away Device. A type of chin strap or chin strap connection designed so that excessive pressure exerted on the helmet in the form of upward force will cause the chin strap to open and release the helmet from the head.

Buddy-Breathing Device. An accessory to self-contained breathing apparatus which permits a second person to share the same air supply as that of the wearer of the apparatus.

Char-Length. The distance from the end of the specimen which was exposed to flame source, to the upper edge of the charred, burned, or void area. (When subjected to flame resistance test.)

Education. The process of imparting knowledge or skill through systematic instruction. It does not require formal classroom instruction.

Emergency Pick-Up Labor. Personnel consisting of National Guard, military forces, forest product workers, farm workers, ranchers, and other persons who may be recruited from time to time to help contain and control wildland fires.

Enclosed Structure. A structure with a roof or ceiling and at least two walls which may present fire hazards to employees;such as, accumulations of smoke, toxic gases and heat, similar to those found in buildings.

Energy, Absorption System. A material or suspension system, or combination thereof, placed inside the helmet between the exterior shell and the wearer's head to absorb and distribute impact energy.

Face Shield. A heat and flame resistant device worn in front of the eyes and face, whose predominant function is protection of the eyes and face.

Fire Fighter. An employee who is assigned to fire fighting activity, and is required to respond to alarms and perform emergency action at the location of a fire or fire related danger. Included are the employees of fire departments, fire protection districts, state fire agencies, organized fire companies, and private fire brigades when engaged in fire fighting activity. The term does not apply to emergency pick-up labor or other persons who may perform first-aid fire extinguishment as collateral to their regular duties. Fire Fighting Activity. Physical action taken in the direct act of fire suppression, and rescue or hazardous duties performed at the location of a fire emergency.

Fire Fighting, Structural. The comprehensive physical fire suppression activity of public fire departments as determined by Sections 25210.5 and 25643 of the California Government Code.

Flame Resistance. A property of materials which causes resistance to ignition or combustion, provided through the use of inherently flame resistant materials, or materials treated to be flame resistant in a manner that the treatment will remain effective for the service life of the material under conditions anticipated for its use.

Harmful Exposure. An exposure to oxygen-deficient atmosphere, or to dusts, fumes, mists, vapors, chemicals or gases of such concentration and duration as to cause injury.

Hazardous Environment. A place where a fire fighter is likely to receive a harmful exposure to a hazardous substance, or be exposed to physical or mechanical hazards which are likely to cause injury.

Hazardous Substance. One which by reason of being explosive, flammable, poisonous, corrosive, oxidizing, irritant or otherwise harmful, is likely to cause injury.

Heat Resistance. The ability of a material to retain its original properties such as shape, size, strength, hardness, resilience, non-conductivity, or appearance when subjected to temperatures specified in heat resistance tests.

Helmet. A device consisting of a shell, energy absorption system, and retention system intended to be worn to provide protection for the head or portions thereof against impact, flying or falling objects, electric shock, penetration, heat and flame, or any combination thereof.

Incipient Stage Fire. A fire which is in the initial or beginning stage and which can be controlled or extinguished by portable fire extinguishers, Class II standpipe, small hose systems or other methods without the need for protective clothing or breathing apparatus.

Injury. Includes work related illness, disease, impairment, disfigurement, loss of function of any part of the body, as well as symptoms of significant adverse effects or damage.

Interior Structural Fire Fighting Activities (Private Fire Brigades). The physical activity of fire suppression, rescue or both, inside of buildings or enclosed structures which are involved in a fire situation beyond the incipient stage.

Lining. A material attached to the inside of the outer shell of a garment for the purpose of thermal protection and padding.

Long Duration Breathing Device. A self-contained respiratory protective device designed to provide the user with a respirable atmosphere for a minimum service time of one hour.

Outer Shell. The exterior layer of material on the fire coat and protective trousers which forms the outermost barrier between the fire fighter and the environment. It is attached to the vapor barrier and liner and is usually constructed with a storm flap, suitable closures, and pockets.

Private Fire Brigade. An organized group of private industry fire personnel who may also be assigned to other functions, but who have priority obligation to fire protection. Fire fighting responsibility may be independent, under mutual-aid agreement, or supported by regular fire service assistance.

Protective Clothing. Outer garments other than turnout clothing consisting of trousers, jackets, or coveralls.

Quick Disconnect Valve. A device which starts the flow of air by inserting of the hose (which leads from the facepiece) into the regulator of self-contained breathing apparatus, and stops the flow of air by disconnection of the hose from the regulator.

Respiratory Protective Device (RPD). A breathing device designed to protect the wearer from oxygen-deficient, or hazardous atmosphere.

(A) Self-contained breathing apparatus (SCBA). A portable respiratory protective device, normally designed to be worn by the user by means of an incorporated harness assembly, with its own supply of air, oxygen or oxygen generating material. It is normally equipped with a full facepiece. Self-contained breathing apparatus is further described in 30 CFR Chapter 1, Part 11, Subpart H.

(B) Closed-Circuit Self-Contained Breathing Apparatus. A device in which exhaled breath is scrubbed of CO2 and recycled.

(C) Open-Circuit Self-Contained Breathing Apparatus. A device in which compressed air is released to the face piece from a storage cylinder, and exhaled air is expelled to the atmosphere. (Oxygen supply is not permitted in open-circuit breathing apparatus used in fire fighting activities.)

(D) Demand-Type Breathing Apparatus. Equipment in which pressure inside the facepiece is slightly negative on inhalation, and positive on exhalation.

(E) Positive-Pressure Type Breathing Apparatus. Equipment in which the pressure inside the facepiece is positive during both inhalation and exhalation.

(F) Combination Breathing Apparatus-Respirator. A combination of compressed air self-contained breathing apparatus and National Institute of Occupational Safety and Health (NIOSH) Type C supplied-air respiratory protective device of the positive-pressure type. Combination respirator equipment is further described in 30 CFR, Chapter 1, Part 11, Subparts H and J.

Retention System. The complete assembly by which the helmet is retained on the head. Included are a chin strap and adjustable or fitted liner for a proper fit.

Self-Extinguishing. A term applied to a material which when subjected to flaming ignition, may ignite and propagate only until removal of the source of ignition.

Service Time. The period of time that a respirator has been rated by NIOSH to provide protection to the wearer.

Training. The process of making proficient through instruction and hands-on practice in the operation of equipment, including respiratory protection equipment, that is expected to be used and in the performance of assigned duties.

Trousers. A garment worn to cover the lower part of the human body from the waist to the ankles.

Turnout Clothing. Protective clothing consisting of a coat and trousers as specified in NFPA 1971 (1981) "Protective Clothing for Structural Fire Fighting" except as modified by Section 3406(b) of these Orders.

Vapor Barrier. That material used to prevent or substantially inhibit the transfer of water, corrosive liquids and steam or other hot vapors from the outside of a garment to the wearer's body.

Wildlands. Sparsely populated geographical areas covered primarily by grass, brush, trees, crops, or combination thereof.

Winter Liner. A detachable extra lining worn inside turnout garments and head protection to give added protection to the wearer against the effects of cold weather and wind.

NOTE: Authority cited: Section 142.3, Labor Code. Reference: Section 142.3, Labor Code.


1. Amendment filed 9-11-80; effective thirtieth day thereafter (Register 80, No. 37).

2. Amendment filed 4-8-81; effective thirtieth day thereafter (Register 81, No. 37).

3. Amendment filed 4-29-85; effective thirtieth day thereafter (Register 85, No. 18).

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