bcfc part 4 presentation fpoabc 2011

7/29/2019 BCFC Part 4 Presentation FPOABC 2011

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BCFC Part 4BCFC Part 4Flammable andFlammable and

Combustible LiquidsCombustible Liquids

Bob FurlongBob Furlong

BCFC Part 4BCFC Part 4

Application:Application:

–– Part 4 provides for the storage,Part 4 provides for the storage,handling, use and processing of handling, use and processing of flammable liquidsflammable liquids andand combustiblecombustibleliquidsliquids inin buildingsbuildings, structures and open, structures and openareas.areas.

BCFC Part 4BCFC Part 4

Part 4Part 4 DOES NOTDOES NOT apply to:apply to:–– transportation of transportation of flammable liquidsflammable liquids oror

combustible liquidscombustible liquids–– appliancesappliances and their ancillary equipment withinand their ancillary equipment within

the scope of CAN/CSAthe scope of CAN/CSA--B139, “Installation CodeB139, “Installation Codefor Oilfor Oil--Burning Equipment” Burning Equipment”

–– the storage of the storage of flammable liquidsflammable liquids ororcombustible liquidscombustible liquids on farms for individualon farms for individualfarm use and on isolated construction projects,farm use and on isolated construction projects,oror

–– the storage of aerosol products covered underthe storage of aerosol products covered underSubsection 3.2.5.Subsection 3.2.5.

Flammable & CombustibleFlammable & CombustibleLiquidsLiquids

BCFC focuses on Flash Point (FP) andBCFC focuses on Flash Point (FP) and

Boiling Point (BP) to establish a ClassBoiling Point (BP) to establish a Class

Rating.Rating.

Different classes of flammable andDifferent classes of flammable andcombustible liquids pose differentcombustible liquids pose differenthazards and therefore have differenthazards and therefore have differentrules.rules.

Classifying FlammableClassifying FlammableLiquidsLiquids

Flammable liquid classes:

Class IA– F.P. below 22.8°C (73°F), boiling point below

37.8°C (100°F)

Class IB– F.P. below 22.8°C (73°F), boiling point at or above

37.8°C (100°F)

ClassClass ICIC–– F.PF.P. at or above. at or above 22.822.8°°C (73C (73°°F), andF), and belowbelow 37.837.8°°CC

(100(100°°F),F),

Classifying CombustibleClassifying CombustibleLiquidsLiquids

Combustible Liquid Classes

Class II

– F.P. at or above 37.8°C (100°F) but below 60°C (140°F.)

Class IIIA– F.P. at or above 60°C (140°F) but below 93.3°C (200°F.)

Class IIIB

– F.P. at or above 93.3°C (200°F.)

..



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Boiling Point

Temperature at which theTemperature at which thesaturatedsaturated vapourvapour pressure of pressure of

a liquid is equal toa liquid is equal toatmospheric pressureatmospheric pressure

Flashpoint and Boiling PointFlashpoint and Boiling Point

Refer to:Refer to:

Manufacturer's Material Safety Data SheetsManufacturer's Material Safety Data Sheets(M(MSDS)SDS)

Combustible liquid classes:

Class II – Flash Point _> 37.8øC and below 60øC

Class IIIA – Flash Point => 60øC and below 93.3øC

Flashpoint and Boiling Point

Manufacturer's Material SafetyData Sheets (MSDS)

Flammable and CombustibleLiquidsFlammable and CombustibleLiquids

ExerciseExercise

LIQUID F.P. B.P. Class

Diesel Fuel #2 100-130 300

Gasoline -45 200-230Motor Oil 450 >500

Isoamyl Acetate 77 288

Ethyl Ether -49 94

Formalin 133 214

Mixture 98% Motor Oil and 2% Gasoline

°F °F

Use the FP (Flash Point) and the BP (BoilingPoint) to determinethe Class usingthe FlammableCombustibleLiquidChart.

ExerciseExercise

LIQUID F.P. B.P. Class

Diesel Fuel #2 100-130 300

Gasoline -45 200-230Motor Oil 450 >500

Isoamyl Acetate 77 288

Ethyl Ether -49 94

Formalin 133 214

Mixture 98% Motor Oil and 2% Gasoline

°F °F

Use the FP (Flash Point) and the BP (BoilingPoint) to determinethe Class using the FlammableCombustibleLiquidChart.

Class II

Class IBClass IIIB

Class IC

Class IA

Class II

Class IB

Flammable and CombustibleFlammable and Combustible

LiquidsLiquids

Heated Liquid?

– When a liquid having a flash point at orabove 37.8°C is being processed,

stored, handled or used at a

temperature at or above its flash point ,it shall be treated as a Class I liquid.


LiquidsLiquids

Used Lubricating Oil?

– Classify as a Class IIIA liquid.

– EXCEPT - When Class I or II liquids areadded to the used oils classify:

through “tests” (BCFC 4.1.3.) oras a Class IC liquid if Class I liquids are

added, or

as a Class II liquid if only Class II liquids areadded.



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Flammable Liquids

Mixtures

–– containing component/scontaining component/swith a flash point of 100with a flash point of 100°°F orF orhigher which make up 99% orhigher which make up 99% ormore of the total volume of themore of the total volume of themixture, are notmixture, are notconsidered flammable.considered flammable.

–– Therefore,Therefore, mixtures containingcontaining

more than 1% of a liquid with amore than 1% of a liquid with aflash point below 100flash point below 100°°FF

are considered flammable.are considered flammable.

Fire Tetrahedron

Sustained

Combustion

Flame

Established

Production

of Ignitable

Vapours

Increases

Surface

Temperature

CombustibleFlammable

Liquid

Oxygen

Heat

Source

Fuel

Suitable

Chemical

Reaction

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Flammable LimitsFlammable Limits

Lower explosive limit (LEL)Lower explosive limit (LEL)–– minimumminimum concentrationconcentration of of vapourvapour

or gas in air below whichor gas in air below whichpropagation of flame does notpropagation of flame does notoccur on contact with a source of occur on contact with a source of ignitionignition..

Upper Explosive Limit (UEL)Upper Explosive Limit (UEL)–– maximummaximum proportionproportion of of vapourvapour inin

air above which propagation of air above which propagation of flame does not occur.flame does not occur.

LELLEL oror UEL areUEL are usuallyusuallyexpressed in terms of expressed in terms of percentage by volume of percentage by volume of vapourvapour in air.in air.

Fire Protection and Prevention

Considerations

BASICS – Management of:Ignition sources

Flammable vapours

Spills or leaks

Ground vegetation and accumulations of combustible materials not essential tooperations.

Contaminated rags and similar materials

Fire Protection and Prevention

Considerations

BASICAccess for fire fightingAccess for fire fighting

Management of Hot WorksManagement of Hot Works

Fire Safety and Emergency PlanFire Safety and Emergency Plan


LiquidsLiquids

Electrical Installations

–– Electrical equipment in a location whereElectrical equipment in a location whereflammable liquidsflammable liquids oror combustible liquidscombustible liquids

are present shall conform to the Britishare present shall conform to the British

ColumbiaColumbia Safety Standards ActSafety Standards Act andandpursuant regulationspursuant regulations



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ElectricalElectrical -- ClassesClasses

Canadian Electrical Code (C.E.C.), Part I,Canadian Electrical Code (C.E.C.), Part I,Section 18Section 18 -- Hazardous Locations,Hazardous Locations,identifies three classes of hazardousidentifies three classes of hazardouslocations:locations:

Class IClass I -- Gas and Vapour EnvironmentsGas and Vapour Environments “Explosion Proof” “Explosion Proof”

Class IIClass II -- Dust EnvironmentsDust Environments

Class IIIClass III -- FibersFibers andand FlyingsFlyings EnvironmentsEnvironments

ElectricalElectrical – – Divisions or ZonesDivisions or Zones

Division - prepre--1998 C.E.C.1998 C.E.C.

ZoneZone -- 1998 C.E.C.1998 C.E.C.

Done to here Go back to flash point

• Hazardous atmosphere is expected tobe present during normal operationson a continuous, intermittent orperiodic basis

Div 1

• Volatile flammable liquids or gasesare handled, processed or used but inwhich they would normally beconfined within closed containers orclosed systems from which they canescape only in the event of anaccidental rupture or breakdown of the containers or systems.

Div 2

Done to here Go back to flash point

• Flammable atmosphere highly likely tobe present - may be present for longperiods or even continuously

Zone 0

• Flammable atmosphere possible butunlikely to be present for long periods

Zone 1

• Flammable atmosphere unlikely to bepresent except for short periods of time - typically as a result of a processfault condition.

Zone 2

ElectricalElectrical – – Division Vs. ZoneDivision Vs. Zone

Terminology

ElectricalElectrical -- GroupGroup

Gas Groups – specific members!



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ComparisonsComparisons Static Electric ChargeStatic Electric Charge

Safety can

Solvent Drum

Screw clamp

Wire ground connector

Flexible wire bonding

Ground

Springclamp

Ground conductor

Terminal l ug

Bonding & GroundingBonding & Grounding

Steps to ProtectSteps to ProtectEvaluateEvaluate

–– Liquid in use (i.e. flammable or combustible)Liquid in use (i.e. flammable or combustible)

–– Quantity limits suitable for occupancyQuantity limits suitable for occupancy

–– Method/location of storageMethod/location of storage

–– Separation needsSeparation needs

–– Storage, processing or dispensing?Storage, processing or dispensing?

–– Sources of ignitionSources of ignition–– Ventilation (natural or mechanical)Ventilation (natural or mechanical)

–– Spill or leak managementSpill or leak management

–– Protection (none, sprinkler or other)Protection (none, sprinkler or other)

–– Fire Safety Planning & supervisory staff Fire Safety Planning & supervisory staff trainingtraining

Steps to ProtectSteps to Protect

LiquidLiquidClassificationClassification

FlammableFlammable

LiquidsLiquids

Class IAClass IAFlash Point <73Flash Point <73°°FFand Boiling Pointand Boiling Point<100<100°°F.F.

Class IBClass IB

Flash Point <73Flash Point <73°°FF

and Boiling Pointand Boiling Point≥100≥100°°F.F.

Class ICClass ICFlash Point ≥73Flash Point ≥73°°FF

and <100and <100°°F.F.



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ProtectionProtection

Other Items for Flammable LiquidOther Items for Flammable Liquid

AreasAreas

–– Floor / Wall Openings / PenetrationsFloor / Wall Openings / Penetrations

Fire DoorsFire Doors

Fire DampersFire Dampers

Fire Stopping Materials.Fire Stopping Materials.




AreasAreas

–– Explosion VentingExplosion Venting

NFPA 30 requires for storage of Class IANFPA 30 requires for storage of Class IAliquids.liquids.

Generally required if dispensing liquids withGenerally required if dispensing liquids withflash point <100flash point <100°°F.F.




AreasAreas–– Bonding and GroundingBonding and Grounding

Generally only needed if dispensing liquids.Generally only needed if dispensing liquids.

ContainersContainers

ContainerTypeFlammableLiquids CombustibleLiquids

C lassIA C lassIB C lassIC C lassII C lassIII

Glass or approved plastic 1 pt. 1 qt. 1 gal. 1 gal. 1 gal.

Metal(otherthan DOTdrums)

1 gal. 5 gal. 5 gal. 5 gal. 5 gal.

Safety cans 2 gal. 5 gal. 5 gal. 5 gal. 5 gal.

Metal drums(DOT specifications)

60 gal . 60 gal. 60 gal. 60 gal. 60 gal .

Approved portable tanks 660 gal. 660 gal. 660 gal. 660 gal. 660 gal.

Note:Containerexemptions: (a) Medicines,beverages, foodstuffs,cosmetics,and other commonconsumer items,when packaged accordingto commonlyaccepted practices,shall be exempt fromthe requirements of ….

Container and Portable Tank StorageContainer and Portable Tank Storage

Storage cabinetsStorage cabinets–– Cabinets shall be labeled in conspicuousCabinets shall be labeled in conspicuous

lettering, "Flammable Keep Fire Away"lettering, "Flammable Keep Fire Away"

–– Must be fire resistantMust be fire resistant

–– Contain no more than 60 gallons of Contain no more than 60 gallons of

Class I or Class II nor contain no moreClass I or Class II nor contain no more

than 120 gallons of Class III liquidsthan 120 gallons of Class III liquids–– Specific requirements for metal and woodSpecific requirements for metal and wood


Inside storage roomsInside storage rooms

–– Shall be constructed to meet theShall be constructed to meet therequired firerequired fire--resistive rating for theirresistive rating for theiruseuse

–– If used for Class I liquids, electricalIf used for Class I liquids, electricalwiring and equipmentwiring and equipment inin “inside “inside

storage” rooms shall be approved forstorage” rooms shall be approved forClass I, Division 2 Hazardous LocationsClass I, Division 2 Hazardous Locations

–– Provided with either a gravity or aProvided with either a gravity or amechanical exhaust ventilation systemmechanical exhaust ventilation system



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In “inside” storage roomsIn “inside” storage rooms

–– Maintain one clear aisle at least 3 feetMaintain one clear aisle at least 3 feetwidewide

–– Containers over 30 gallons capacityContainers over 30 gallons capacityshall not be stacked one upon theshall not be stacked one upon theotherother

–– Dispensing shall be by approvedDispensing shall be by approvedpump or self pump or self--closing faucet onlyclosing faucet only

–– Storage shall comply with Table HStorage shall comply with Table H--1313

Storage Inside RoomsStorage Inside Rooms

Fire Protection (1)

ProvidedFireResistance Maximum Size

Total Allowable

Quantities –

gals./sq.

ft/floor area

Yes 2 hours 500 Sq. Ft. 10

No 2 hours 500 Sq. Ft. 4*

Yes 1 hour 150 Sq. Ft. 5*

No 1 hour 150 Sq. Ft. 2

Footnote( 1) Fire protection system shall be sprinkler,water spray,carbondioxide, or other acceptablesuppressionsystem.


Office occupanciesOffice occupancies

–– Storage prohibited except if required forStorage prohibited except if required formaintenance, operation of building andmaintenance, operation of building and

operation of equipmentoperation of equipmentShall be kept in closed metal containersShall be kept in closed metal containers

stored in a storage cabinet or in safety cansstored in a storage cabinet or in safety cansor in an inside storage roomor in an inside storage room

Incidental UseIncidental Use

Incidental storage or use of Incidental storage or use of flammable and combustible liquidsflammable and combustible liquids

–– Quantity located outside of an insideQuantity located outside of an inside

storage room or storage cabinet:storage room or storage cabinet:25 gallons of Class IA liquids25 gallons of Class IA liquids

120 gallons of Class IB, IC, II, or III liquids120 gallons of Class IB, IC, II, or III liquids

660 gallons of Class IB, IC, II, or III liquids660 gallons of Class IB, IC, II, or III liquids

–– Kept in covered containers whenKept in covered containers when

not in usenot in use

Fire ExtinguishersFire Extinguishers

Portable fire extinguishment andPortable fire extinguishment andcontrol equipment shall be provided tocontrol equipment shall be provided tomeet the special hazards of operationmeet the special hazards of operationand storage.and storage.

ITM.ITM.

Industrial PlantsIndustrial Plants

Class I liquids shall not be dispensedClass I liquids shall not be dispensedinto containers unless the nozzle andinto containers unless the nozzle andcontainer are electricallycontainer are electricallyinterconnected (grounding).interconnected (grounding).

Spills shall be cleanedSpills shall be cleanedup promptly.up promptly.



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Consider the following:Consider the following:–– OccupancyOccupancy

–– Class of liquids that will be presentClass of liquids that will be present

–– Engineering specifications such as fire wall size,Engineering specifications such as fire wall size,fire suppression systems, tank design, etc.fire suppression systems, tank design, etc.

–– Maximum volume restrictionsMaximum volume restrictions

–– Codes and Local BylawsCodes and Local Bylaws

–– Marking and labeling requirementsMarking and labeling requirements

Summarizing StorageSummarizing Storage

RequirementsRequirements The flash point determines if a substance fallsThe flash point determines if a substance fallswithin the scope of the standard.within the scope of the standard.

The flash point and boiling point together,The flash point and boiling point together,determine how substances are stored:determine how substances are stored:

–– Container capacity and spacingContainer capacity and spacing

–– Maximum amount per locationMaximum amount per location

The …. help you determine storage limits,The …. help you determine storage limits,venting capacities, allowable sizes of containersventing capacities, allowable sizes of containersand more...and more...

Summarizing StorageSummarizing Storage

RequirementsRequirements

Assembly & ResidentialAssembly & Residential

When a single class of liquid is stored, thetotal quantity shall not exceed:

Assembly/Residential Quantity (max)

Class I 30 liter

Class II 150 liter

Class III 600 liter

Assembly & Residential

qi + qii + qi ii A < 1

30 150 600

When a two or more classes of liquid arestored in the building, the total quantityshall not exceed:

qI = actual qty. of Class IqII = actual qty. of Class IIqIII = actual qty. of Class III

Assembly & Residential

qi + qii + qi ii A < 1

30 150 600

Example calculation:

Qty of Class I = 15 litersQty of Class II = 60 litersQty of Class III = 100 liters

qI = actual qty. of Class I

qII = actual qty. of Class IIqIII = actual qty. of Class III

Industrial

Storage FacilitiesStorage Facilities

Incidental useIncidental use BCFCBCFC Subsection 4.2.8Subsection 4.2.8..

CabinetsCabinets BCFCBCFC Subsection 4.2.10.Subsection 4.2.10.,,

Rooms BCFCRooms BCFC Subsection 4.2.9.Subsection 4.2.9., or, or

Storage areasStorage areas BCFCBCFC Article 4.2.7.5Article 4.2.7.5..



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Industrial

Storage AreasStorage Areas

Storage areasStorage areas BCFCBCFC Article 4.2.7.5Article 4.2.7.5..

Industrial

* Where a building or part of building is designed for the storage of flammableliquids or combustible liquids, thereis no limit on the total quantityof storage per fire compartment providedthe building or part of building is

separatedfrom adjacent buildings or parts of buildings bya)a firewall having a fire-resistance rating of at least 4 h, orb)spatialseparationi n conformance with the British Columbia BuildingCode.

Industrial

When a two or more classes of liquid arestored in the building, the total quantityshall not exceed:

Industrial

Storage Cabinets BCFC 4.2.10.Storage Cabinets BCFC 4.2.10.

The maximum quantity of flammableliquids and combustible liquids stored in acabinet shall be 500 L, of which not morethan 250 L shall be Class I liquids.

Industrial

Storage CabinetsStorage Cabinets BCFC 4.2.10.BCFC 4.2.10.

The total quantity of flammable liquidsand combustible liquids stored in cabinets

in a single fire compartment shall notexceed the quantity permitted for 3cabinets.

Industrial

Storage CabinetsStorage Cabinets

Except, the firecompartment qty can be

exceeded if: the total quantity stored in a

group of cabinets is not morethan the quantity permitted for 3cabinets, and

the distance between groups of cabinets is not less than 30 m.



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Industrial

Incidental useIncidental use

Incidental useIncidental use BCFCBCFC Subsection 4.2.8Subsection 4.2.8..

Applies to industrial occupancies where theuse, storage and handling of flammable liquidsor combustible liquids is secondary to theprincipal activity

Industrial

Incidental useIncidental use Quantity permitted to be located outside of

storage rooms or storage cabinets in any one firecompartment of a building, shall not be morethan: 600 L of flammable liquids and combustible liquids in closed

containers, of which not more than 100 L shall be Class IAliquids, and

5 000 L of Class IB, IC, II and IIIA liquids in storage tanks orportable tanks

Where required for normal plant activity, quantities are

permitted to exceed the above, but shall not be greater thanthe supply for one day of normal operation.

Industrial

Incidental useIncidental use Handling:

Areas in which flammable liquids orcombustible liquids are transferred from onecontainer or storage tank to another, or wherethey are used in such a way as to releasepotentially explosive concentrations of flammable vapours, shall be separated frompossible sources of ignition by a spatialseparation of not less than 6 m, or by a fireseparation.

Industrial

Incidental useIncidental use General Storage:

When a single class of liquid is stored, thetotal quantity in a single fire compartment shall be not more than:

a)2 500 L of Class IB and IC liquids,b)5 000 L of Class II liquids, orc)10 000 L of Class IIIA liquids.

Industrial


When 2 or more classes of liquid are stored inthe same fire compartment , the total quantitypermitted for each class of liquid shall be:

Industrial


When 2 or more classes of liquid are stored inthe same individual storage area, themaximum quantity permitted in the individual storage area shall be that permitted for theliquid with the lowest limit of:

a)2 500 L of Class IB and IC liquids,b)5 000 L of Class II liquids, orc)10 000 L of Class IIIA liquids



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Plunger Safety Can Dispensing Safety Can

NO!

Used Rag Waste Cans

Waste cans for the disposal of oily rags should be of metal

Kept closed

Not ignite from outside sources

Oxygen is limited

Not allow a sustained fire if ignition occurs.

Industrial

Storage RoomStorage Room

The maximum quantities and densities of flammable liquids and

combustible liquids are permitted to be doubled provided thestorage room is protected by an automatic fire suppression system

Industrial

Storage RoomStorage Room

The maximum quantities of Class I liquids in an unprotected

storage room with a fire separation having a fire-resistance

rating of not less than 2 h shall:

• not exceed those specified for unprotected storage, and

• comply with limits for multiple flash points.

Industrial

Storage Rooms BCFC 4.2.9.Storage Rooms BCFC 4.2.9.

Storage rooms referred to in Article4.2.9.1. shall be liquid-tight where

the walls join the floor



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Industrial

Storage Rooms BCFC 4.2.9.Storage Rooms BCFC 4.2.9. The contents of flammable liquid and combustible

liquid storage rooms referred to in Article 4.2.9.1.shall be arranged to provide aisle widths of notless than 1 m.

Industrial

Storage Rooms BCFC 4.2.9.Storage Rooms BCFC 4.2.9. Dispensing of flammable liquids or combustible

liquids from containers having a capacity of morethan 30 L shall be by pumps or through self-closing valves, designed in conformance withgood engineering practice. (See A-4.1.8.3.(1) inAppendix A

Industrial

Storage Rooms BCFC 4.2.9.Storage Rooms BCFC 4.2.9.

Where Class IA or IB liquids are dispensed

within a storage room, the room shall bedesigned to prevent critical structural andmechanical damage from an internalexplosion in conformance with goodengineering practice such as thatdescribed in NFPA 68, “Venting of Deflagrations.” (See A-3.2.8.2.(1)(d) inAppendix A.)

Industrial

Storage Rooms BCFC 4.2.9.Storage Rooms BCFC 4.2.9.Ventilation4.1.7.1. Rooms or Enclosed Spaces1) Where flammable liquids andcombustible liquids are processed, handled,stored, dispensed or used within rooms or

enclosed spaces, ventilation shall conform tothe applicable requirements of this Part andthe British Columbia Building Code. (SeeAppendix A.)

Industrial

Storage Rooms BCFC 4.2.9.Storage Rooms BCFC 4.2.9.VentilationExcept as permitted in Sentence (2), a roomor enclosed space referred to in Article4.1.7.1. shall be provided with one of thefollowing ventilation systems:

a)continuous mechanical ventilation whereClass I liquids are processed, dispensed orused in a manner that releases flammablevapours into the room or enclosed space,b)either natural or continuous mechanical

ventilation where

Elevationview

Door

Control of Static charge



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Elevationview

Door

transfer 4.1.3.8.

Elevationview

Door

Plan view

Drainage System4.1.6.2.

Elevationview

Door

Spill Control

Sill and containment of possible spill

Curb to contain credible spill.

Door

Spill Control

Drainage System:

•Terminates in area which does not impose fire hazard or risk

•Directs spill away from buildings, means of egress, fire dept. access routes,valves controlling flow of flammable liquids or fire fighting water supplies.

Elevationview

Door No Smoking

Control ignition

Sources



14

Plan view

Ventilation of vapours heavier than air

At least 1 air inlet at a point near a wall,and no higher than 300 mm from the floor

At least 1 air outlet located near theopposite wall no higher than 300 mmfrom the floor

Keep inlet/exhaust openingsfree of obstructions

Elevationview

Door

12 inches300 mm max from floor

Plan view

Ventilation vapours lighter than air

At least 1 air inlet at a point near a wall,and no lower than 300 mm from the ceiling

At least 1 air outlet located near theopposite wall no lower than 300 mmfrom the ceiling

Keep inlet/exhaust openingsfree of obstructions

Elevationview

Door12 inches300 mm max from ceiling

Elevationview

Door

12 inches300 mm max fromfloor AND ceiling

Ventilation vapours heavier AND lighter than air Where dispensing of flammableliquids

Duct systems: not to be used for ANY other ventilationor exhaust system.

Sander



15

Elevationview

Door

roof

Ventilation: 18 cubic meters/hour/squaremeter area (1 CFM per FT2) but not less than250 cubic meters/hour (150 CFM)

Not less than 3 m to any

building opening

Exhaust air is not to dischargeTOWARDS any unprotectedopening within 7.0 meters of thedischarge point

Elevationview

Door

roof

Make-up air: for natural ventilation system,take air from point outside

Make-up air taken from a point remote from exhaust discharge

When average air velocity inthe roomexceeds 0.5 m/second,

make-up air is required.

Elevationview

Door

roof

Make-up air: for mechanical ventilationsystem, taking air from within buildingthru a DAMPER opening

Make-up air taken from a point remote from exhaust discharge

Elevationview

Door

roof

Interlocks: where continuous ventilation isinstalled to maintain 25% LEL, the ventilationshall be interlocked to shut-down activitycreating flammable vapours when ventilation isnot active, AND sound an audible alarm in anattended area.

Door

Elevationview

Light switch

Door

Penetration of wall assembly

Sill

Door

Plan viewLight switch

Lighting

conduit

Conduit seal/plug

Heater

bcfc part 4 presentation fpoabc 2011

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