OBC INDUSTRIAL
MAJOR OCCUPANCY
CLASSIFICATION
OBOA ANNUAL MEETING AND
TRAINING SESSIONS
LONDON ON
OCTOBER 4
4, 2011
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PRESENTERS
• RANDAL BROWN
– P.ENG., PE, BDS, FSPFE
– PRESIDENT
• MARK HARROP
– P.ENG., BDS, CFPS
– MANAGER,
MANAGER INDUSTRIAL DIVISION
• RANDAL BROWN & ASSOCIATES LTD
LTD.
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PRINCIPAL TOPICS
• INDUSTRIAL MAJOR OCCUPANCIES
– DIFFERENTIATING
– 10% CONCEPT
– PAINT SPRAY BOOTH EXAMPLE
• OBC / OFC MANDATED PROTECTION
– HOW TO GET FROM OBC TO OFC
– WHAT TO LOOK FOR AND ASK FOR
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SPRAY BOOTH PHOTO
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SPRAY BOOTH PHOTO
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MAJOR OCCUPANCY DEFN
• DEFINED IN OBC
– MAJOR OCCUPANCY:
• MEANS THE PRINCIPAL OCCUPANCY
FOR WHICH A BUILDING OR PART OF A
BUILDING IS USED OR INTENDED TO BE
USED, AND IS DEEMED TO INCLUDE
SUBSIDIARY OCCUPANCIES THAT ARE
AN INTEGRAL PART OF THE PRINCIPAL
OCCUPANCY.
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MAJOR OCCUPANCY DEFN
• KEY POINTS:
– PRINCIPAL USE
– BUILDING OR PART OF BUILDING
• CAN HAVE SEVERAL MAJOR
OCCUPANCIES IN A BUILDING
– INCLUDES SUBSIDIARY USES
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EXAMPLES OF MAJOR
OCCUPANCIES
• APPENDIX NOTE A-3.1.2.1.(1)
A 3 1 2 1 (1)
• PART 11 TABLES
• OTHER CODES
– IBC
– NFPA 101 & 5000
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EXAMPLES OF MAJOR OCCYS
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EXAMPLES OF MAJOR OCCY
PART 11
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EXAMPLES OF MAJOR OCCY
PART 11
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HOW TO DETERMINE MAJOR
OCC’Y CLASSIFICATION
• BUILDING OFFICIAL TO ASK
– OWNER / DESIGNER
– ASK TO SEE EQUIPMENT LAYOUTS
• BUILDING OFFICIAL TO ASK:
– WHAT IS ACTUALLY BEING DONE IN
THE BUILDING?
– WHAT IS THE MAIN ACTIVITY?
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HOW TO DETERMINE MAJOR
OCC’Y CLASSIFICATION
• WHEN HAVE MULTIPLE USES:
– WOULD ONE OCCUPANCY / USE EXIST
WITHOUT THE OTHER?
• 1
1. WOULD OFFICE BE PRESENT
WITHOUT THE FACTORY?
• 2. WOULD BOARDROOM BE
PRESENT WITHOUT THE OFFICES?
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HOW TO DETERMINE MAJOR
OCC’Y CLASSIFICATION
• EXAMPLE OF AUTOMOTIVE SPRAY
BOOTH
– SPRAY BOOTH IN A MAACO?
• MAIN PURPOSE: BODYSHOP AND SPRAY
PAINT CARS.
• WHAT IS THE MAJOR OCCUPANCY???
– F2 REPAIR GARAGE ??? OR……
– F1 SPRAY BOOTH ???
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HOW TO DETERMINE MAJOR
OCC’Y CLASSIFICATION
• EXAMPLE OF AUTOMOTIVE SPRAY BOOTH
– SPRAY BOOTH IN A AUTOMOBILE DEALERSHIP?
• MAIN PURPOSE: SELL CARS, REPAIR CARS,
MAINTENANCE OF CARS.
• PAINTING IS JUST ONE FUNCTION.
• DEALERSHIP WOULD STILL BE PRESENT WITHOUT
THE PAINT SPRAY BOOTH
• SO SPRAY BOOTH IS A SUBSIDIARY USE AND NOT A
MAJOR OCCUPANCY.
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STEP 1 – GENERAL MAJOR
OCCUPANCY
• WHAT IS MAIN USE?
• USE EXAMPLES IN APPENDIX
• USE EXAMPLES IN PART 11
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STEP 2
FUEL LOAD ANALYSIS
• INDUSTRIAL OCCUPANCIES
– F1 – HIGH HAZARD INDUSTRIAL
– F2 – MEDIUM HAZARD INDUSTRIAL
– F3 – LOW HAZARD INDUSTRIAL
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F1 – HIGH HAZARD
INDUSTRIAL OCCUPANCY
• SUFFICIENT QUANTITY,
QUANTITY AND
• SPECIAL FIRE HAZARD
• HIGHLY COMBUSTIBLE AND FLAMMABLE, OR
• EXPLOSIVE MATERIALS
• INHERENT CHARACTERISTICS
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F1 – HIGH HAZARD
EXAMPLES
• SUFFICIENT QUANTITY,
QUANTITY AND
• SPECIAL FIRE HAZARD
– PYROPHORIC
– SELF-COMBUST IN AIR
– CHEMICAL REACTIONS
• EXAMPLES IN APPENDIX
• CHEMICAL PLANTS
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F2 VS F3
• F2 – MEDIUM HAZARD
– COMBUSTIBLE CONTENT MORE THAN
• 50 KG/M2 OF FLOOR AREA,
AREA OR
• 1200 MJ/M2 OF FLOOR AREA.
• F3 – LOW HAZARD
– COMBUSTIBLE CONTENT NOT MORE THAN
• 50 KG/M2 OF FLOOR AREA, OR
• 1200 MJ/M2 OF FLOOR AREA.
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F2 VS F3 (CONT
(CONT’D)
D)
• FUEL LOAD ANALYSIS
• NEED:
– QUANTITY OF MATERIALS IN BUILDING
– WEIGHT OF MATERIALS IN BUILDING
– HEAT OF COMBUSTION
• SFPE HANDBOOK
• NFPA HANDBOOK
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F2 VS F3 (CONT
(CONT’D)
D)
• EITHER CRITERIA WILL TRIGGER
OCCUPANCY CLASSIFICATION.
• SO NEED TO LOOK AT BOTH
• WEIGHT OF COMBUSTIBLE MATERIALS, AND
• HEAT OF COMBUSTION OF COMBUSTIBLE
MATERIALS
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F2 VS F3
• STILL USE APPENDIX AND PART 11
EXAMPLES.
• WON’T DO FUEL LOAD ANALYSIS FOR
EVERY INDUSTRIAL OCCUPANCY
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SFPE HANDBOOK
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NFPA HANDBOOK
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SAMPLE FUEL LOAD
CALCULATION
Category of g y
Combustible Material Mass
(kg) Heat of Combustion (MJ/kg) Heat Released
(MJ) Hydraulic Oils 1 400 kg (approx.) 46.0 MJ/kg 64 400 MJ
Cables and Wiring 11 000 kg (approx.) 43.4 MJ/kg 477 400 MJ FRP Floor Grating
FRP Floor Grating 6 000 kg (approx )
6 000 kg (approx.) 40 52 MJ/kg
40.52 MJ/kg 243 120 MJ
243 120 MJ FRP Tanks & Associated Piping 36 000 kg (approx.) 40.52 MJ/kg 1 458 720 MJ Miscellaneous 43.4 MJ/kg 260 400 MJ TOTAL 2 504 040 MJ
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6 000 kg (approx.) 26
10% MAJOR OCCUPANCY
PROVISION
• 3.2.2.8.(1)
3 2 2 8 (1)
– AGGREGATE AREA OF ALL MAJOR
OCCUPANCIES IN A PARTICULAR
DIVISION IS NOT MORE THAN 10% OF
THE FLOOR AREA OF THE STOREY,
NEED NOT BE CONSIDERED AS MAJOR
OCCUPANCY FOR PURPOSES OF THIS
SUBSECTION, PROVIDED NOT F1 OR F2.
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10% PROVISION (CONT
(CONT’D)
D)
• MUST BE A MAJOR OCCUPANCY
– DOES NOT INCLUDE SUBSIDIARY USES.
• APPLIES WELL TO
– A STRIP PLAZA WITH AN INDUSTRIAL
OCCUPANCY
– GROUND FLOOR OF CONDO
• RETAIL AND RESIDENTIAL MAJOR OCCUPANCIES
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10% PROVISION (CONT
(CONT’D)
D)
• F1 OR F2 CAN BE LESS THAN 10% AND
ARE REQUIRED TO BE CONSIDERED A
MAJOR OCCUPANCY FOR 3
3.2.2.
22
• THIS 10% RELAXATION IS ONLY FOR
THIS SUBSECTION
• ONLY FOR 3.2.2.
3 2 2 – CONSTRUCTION
• OCCUPANCY PROHIBITIONS ARE STILL
APPLICABLE.
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10% PROVISION
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10% PROVISION
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INDUSTRIAL OCCUPANCY
SUMMARY
• USE COMMON SENSE
• ASK DESIGNER TO CLASSIFY
MAJOR OCCUPANCY
• HAVE RIGHT TO ASK FOR A FUEL
LOAD / COMBUSTIBLE LOAD STUDY
– STAMPED BY P.ENG.
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NOTES:
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CASE STUDY: SPRAY BOOTH
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CASE STUDY: SPRAY BOOTH
• COMMON EXAMPLE OF F1
OCCUPANCY
• SPRAY APPLICATION OF
FLAMMABLE LIQUIDS
• WHAT IS “SPECIAL FIRE HAZARD”?
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SPRAY BOOTH HAZARD:
• THE ATOMIZATION OF FLAMMABLE
OR COMBUSTIBLE MATERIAL AS A
RESULT OF SPRAYING
• LEADS TO FREQUENT
OPERATIONS DURING WHICH A
FLAMMABLE / EXPLOSIVE VAPOURAIR MIXTURE IS PRESENT
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CASE STUDY: SPRAY BOOTH
• OTHER EXAMPLES OF F1 OCCUPANCIES
ALSO FOCUS ON HAZARDOUS
MATERIALS
• HAZARDOUS MATERIALS MUST BE
ADDRESSED IN CONFORMANCE WITH
THE REQUIREMENTS OF THE FIRE CODE
3 3 1 2 (1)
• OBC SENTENCE 3.3.1.2.(1)
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CASE STUDY: SPRAY BOOTH
• ONTARIO FIRE CODE (OFC)
SECTION 5.12 ADDRESSES SPRAY
APPLICATION OF FLAMMABLE AND
COMBUSTIBLE MATERIALS
• OFC SUBSECTION 5.14.5
ADDRESSES AUTOMOBILE
UNDERCOATING, ALSO A SPRAY
OPERATION
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CASE STUDY: SPRAY BOOTH
• LOCATION OF SPRAY OPERATIONS
• OFC REQUIRES SEPARATION IN
CONFORMANCE WITH OBC, WHERE
APPLICABLE (OFC 5
5.12.1.1)
12 1 1)
• THIS IS A REFERENCE TO MAJOR
OCCUPANCY SEPARATION (OBC 3.1.3.1)
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SPRAY BOOTH
CONSTRUCTION
• STEEL FRAME AND SHEET STEEL
AT LEAST 1.14 MM THICK, OR
EQUIVALENT NONCOMBUSTIBLE
CONSTRUCTION
• INTERIOR SURFACES SMOOTH
AND CONTINUOUS, FLOOR IN
BOOTH NONCOMBUSTIBLE
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SPRAY BOOTH
CONSTRUCTION
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SPRAY BOOTH
CONSTRUCTION
• OVERSPRAY COLLECTION
• FILTERS TO PREVENT COMBUSTIBLE
ACCUMULATION ON FAN BLADE,
CASING AND DUCTWORK
• FILTER SUPPORTS NONCOMBUSTIBLE
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SPRAY BOOTH
CONSTRUCTION
• FILTERS MUST BE READILY
ACCESSIBLE FOR CLEANING OR
REPLACEMENT
• PROCEDURES TO REPLACE PRIOR
TO EXCESSIVE RESTRICTION OF
AIRFLOW
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SPRAY BOOTH
CONSTRUCTION
• FAN BLADES AND CASINGS MUST BE
OF NON-FERROUS CONSTRUCTION
OR DESIGNED TO PREVENT
CONTACT OF FERROUS PARTS
• REFERENCE AMCA SPARKRESISTANT CONSTRUCTION (A/B/C)
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VENTILATION
• VENTILATION IN SPRAY AREAS
MUST:
– KEEP CONCENTRATION BELOW 25%
OF LEL OF MATERIAL,, AND
– MEET A 30 M/MIN VELOCITY
REQUIREMENT AT FACE OF BOOTH
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VENTILATION
• DEDICATED EXHAUST FOR EACH
SPRAY BOOTH (EXCEPT WHEN
LESS THAN 1.8
1 8 M2 FRONTAL AREA)
• NO RECIRCULATION
• GAUGES OR ALARMS REQUIRED
TO MEASURE AIR VELOCITY
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VENTILATION
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VENTILATION
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VENTILATION
• DUCTS MUST BE SHEET STEEL,
STEEL
THICKNESS AS PER OFC, BASED
ON DUCT DIAMETER
• ACCESS OPENINGS FOR CLEANING
• CLEARANCE OF 457 MM BETWEEN
DUCTS AND UNPROTECTED
COMBUSTIBLE MATERIAL
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VENTILATION
• DUCTS THROUGH COMBUSTIBLE
PARTITIONS AND ROOFS REQUIRE A
METAL COLLAR WITH 100 MM MINIMUM
CLEARANCE AND NONCOMBUSTIBLE
INSULATING MATERIAL
• AIR DISCHARGE NOT WITHIN 1.8
1 8 M OF
COMBUSTIBLE EXTERIOR WALL OR
ROOF
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ELECTRICAL EQUIPMENT
• ELECTRICS IN A SPRAYING AREA
(BOOTH OR ROOM) MUST
CONFORM TO CHAPTERS 18 AND
20 OF ELECTRICAL CODE
• CHAPTER 18 – GENERAL
REQUIREMENTS
• RULE 20-400 – SPECIFIC FOR
SPRAY BOOTHS
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ELECTRICAL EQUIPMENT
• INSIDE SPRAY BOOTH AND
EXHAUST DUCTWORK - CLASS I,
ZONE 1 HAZARDOUS LOCATION
• OUTSIDE SPRAY BOOTH – CLASS I,
ZONE 2 IN A 1.5 M RADIUS OF THE
OPEN SIDE IN ALL DIRECTIONS, UP
TO 1 M ABOVE THE CEILING OF
THE BOOTH
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ELECTRICAL EQUIPMENT
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ELECTRICAL EQUIPMENT
• ELECTRIC MOTORS FOR EXHAUST
FANS ARE NOT PERMITTED IN SPRAY
BOOTHS OR EXHAUST DUCTS
• METAL PARTS OF SPRAY BOOTHS
AND EXHAUST DUCTS AND PIPING
FOR FLAMMABLE LIQUIDS MUST BE
ELECTRICALLY GROUNDED
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OPERATIONS
• FLAMMABLE LIQUIDS MUST BE
STORED AND HANDLED IN
CONFORMANCE WITH PART 4 OF
THE OFC
• MAXIMUM QUANTITY IN THE SPRAY
AREA IS ONE DAY
DAY’S
S SUPPLY –
CONTAINERS KEPT CLOSED WHEN
NOT IN USE
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OPERATIONS
• SPRAYING EQUIPMENT IN SPRAY
BOOTH MUST BE INTERLOCKED TO
THE VENTILATION SYSTEM IN THE
BOOTH
• DISCARDED FILTERS REMOVED TO
SAFE LOCATION OR PLACED IN A
METAL, WATER-FILLED CONTAINER
AND REMOVED AT END OF DAY
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FIRE PROTECTION
• REQUIRED
• SPRAY AREAS
AREAS, SPRAY BOOTHS
BOOTHS, AND
SPRAY ROOMS MUST BE SPRINKLERED
IN CONFORMANCE WITH NFPA 13
• IF UNSPRINKLERED BUILDING
BUILDING, FIRE
PROTECTION COULD BE AS PER NFPA 33
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FIRE PROTECTION
• IF SPRINKLERED,
SPRINKLERED NFPA 13 REQUIRES
EXTRA HAZARD (GROUP 2) PROTECTION
UNDER MOST CIRCUMSTANCES
• HEADS REQUIRE PROTECTION FROM
OVERSPRAY BY THIN PAPER OR
LIGHTWEIGHT POLYETHYLENE BAGS
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FIRE PROTECTION
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FIRE PROTECTION
• PORTABLE FIRE EXTINGUISHERS
REQUIRED IN CONFORMANCE
WITH OFC SECTION 6.2
62
• CLASS B EXTINGUISHERS FOR
FLAMMABLE AND COMBUSTIBLE
LIQUIDS
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AUTOMOBILE
UNDERCOATING
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AUTOMOBILE
UNDERCOATING
• SPECIFIC EXAMPLE (OFC,
(OFC 5
5.14.5)
14 5)
• UNDERCOATING MATERIAL MUST
HAVE FLASH POINT NOT LESS
THAN 37.8 DEGREES CELSIUS
• LESS STRINGENT THAN
FLAMMABLE PAINTING
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AUTOMOBILE
UNDERCOATING
• IF FLASH POINT LESS THAN 60
DEGREES CELSIUS THEN
VENTILATION REQUIRED TO KEEP
VAPOUR LESS THAN 25% OF LEL
• AIR MOVES ALONG LENGTH OF
VEHICLE, EXHAUST APPROXIMATELY
1 M ABOVE FLOOR
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NOTES:
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THANK-YOU
RANDY BROWN & MARK HARROP
RANDAL BROWN & ASSOCIATES LTD.
105 - 6 LANSING SQUARE
TORONTO ON M2J 1T5
416-492-5886
[email protected]
[email protected]
WWW.RBACODES.COM
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