1. STRUCTURE FIRE CONTROL INSTRUCTOR1
NFPA 1142NFPA 1142
FAMILIARIZATIONFAMILIARIZATION

2. TERMINAL PERFORMANCETERMINAL PERFORMANCE
OBJECTIVEOBJECTIVE
The student shall determine the minimumThe student shall determine the minimum
water supply necessary to conduct live firewater supply necessary to conduct live fire
training evolutions in an acquiredtraining evolutions in an acquired
structure or training center burn building,structure or training center burn building,
according toaccording to NFPA 1142, Standard onNFPA 1142, Standard on
Water Supplies for Suburban and Rural FireWater Supplies for Suburban and Rural Fire
Fighting.Fighting.

3. STRUCTURE FIRE CONTROL INSTRUCTOR3
ENABLING OBJECTIVESENABLING OBJECTIVES
Identify & describe the purpose of NFPA 1142.Identify & describe the purpose of NFPA 1142.
Identify & describe the occupancy hazardIdentify & describe the occupancy hazard
classifications found in NFPA 1142.classifications found in NFPA 1142.
Identify & describe the constructionIdentify & describe the construction
classification numbers found in NFPA 1142.classification numbers found in NFPA 1142.
Determine minimum water supplyDetermine minimum water supply
requirements, including a 50% reserve, forrequirements, including a 50% reserve, for
conducting live fire training evolutions in aconducting live fire training evolutions in a
structure.structure.

4. PURPOSE OF NFPA 1142PURPOSE OF NFPA 1142
NFPA 1142, Standard on WaterNFPA 1142, Standard on Water
Supplies for Suburban and RuralSupplies for Suburban and Rural
Fire Fighting contains formulae forFire Fighting contains formulae for
determining the minimum amountdetermining the minimum amount
of water that must be available onof water that must be available on
site when conducting structure firesite when conducting structure fire
control training.control training.

5. STRUCTURE FIRE CONTROL INSTRUCTOR5
NFPA 1142NFPA 1142
WATER SUPPLYWATER SUPPLY
 Instructor-in-charge shall ensure that:Instructor-in-charge shall ensure that:
the onsite water meets the required orthe onsite water meets the required or
needed water supply for the given structureneeded water supply for the given structure
water supply meets requirements of NFPAwater supply meets requirements of NFPA
11421142
a minimum reserve of water be available fora minimum reserve of water be available for
each evolutioneach evolution
attack lines and backup line are feed fromattack lines and backup line are feed from
separate water sourcesseparate water sources

6. STRUCTURE FIRE CONTROL INSTRUCTOR6
NFPA 1142NFPA 1142
WATER SUPPLYWATER SUPPLY
 Understanding NFPA 1142 and how itUnderstanding NFPA 1142 and how it
works with NFPA 1403works with NFPA 1403
What information do you need to gather toWhat information do you need to gather to
determine the needed water for thedetermine the needed water for the
structure?structure?
Occupancy Hazard ClassificationOccupancy Hazard Classification
Construction ClassificationConstruction Classification
Structural DimensionsStructural Dimensions
ExposuresExposures

7. STRUCTURE FIRE CONTROL INSTRUCTOR7
NFPA 1142NFPA 1142
OCCUPANCY HAZARD CLASSESOCCUPANCY HAZARD CLASSES
 OHC 3OHC 3
Considered Severe Hazard OccupanciesConsidered Severe Hazard Occupancies
These structures shall be considered anThese structures shall be considered an
exposure no mater what there sizeexposure no mater what there size
Includes the following occupancy types:Includes the following occupancy types:
Cereal millsCereal mills
Explosives manufacturing/storageExplosives manufacturing/storage
Saw millsSaw mills
Plastic processing facilitiesPlastic processing facilities

8. STRUCTURE FIRE CONTROL INSTRUCTOR8
NFPA 1142NFPA 1142
OCCUPANCY HAZARD CLASSESOCCUPANCY HAZARD CLASSES
 OHC 4OHC 4
Considered High Hazard OccupanciesConsidered High Hazard Occupancies
These structures shall be considered anThese structures shall be considered an
exposure no mater what there sizeexposure no mater what there size
Includes the following occupancy types:Includes the following occupancy types:
Commercial barns and stablesCommercial barns and stables
Building materials supply storageBuilding materials supply storage
Department storesDepartment stores
TheatersTheaters

9. STRUCTURE FIRE CONTROL INSTRUCTOR9
NFPA 1142NFPA 1142
OCCUPANCY HAZARD CLASSESOCCUPANCY HAZARD CLASSES
 OHC 5OHC 5
Considered Moderate Hazard OccupanciesConsidered Moderate Hazard Occupancies
The quantity and combustibility of contentsThe quantity and combustibility of contents
develop at moderate rates.develop at moderate rates.
Includes the following occupancy types:Includes the following occupancy types:
Clothing manufacturingClothing manufacturing
Libraries with large stock roomsLibraries with large stock rooms
LaundriesLaundries
Tobacco barnsTobacco barns
RestaurantsRestaurants

10. STRUCTURE FIRE CONTROL INSTRUCTOR10
NFPA 1142NFPA 1142
OCCUPANCY HAZARD CLASSESOCCUPANCY HAZARD CLASSES
 OHC 6OHC 6
Considered Low Hazard OccupanciesConsidered Low Hazard Occupancies
The quantity and combustibility of contentsThe quantity and combustibility of contents
develop at low ratesdevelop at low rates
Includes the following occupancy types:Includes the following occupancy types:
ChurchesChurches
Municipal buildingsMunicipal buildings
Service stationsService stations

11. STRUCTURE FIRE CONTROL INSTRUCTOR11
NFPA 1142NFPA 1142
OCCUPANCY HAZARD CLASSESOCCUPANCY HAZARD CLASSES
 OHC 7OHC 7
Considered Light Hazard OccupanciesConsidered Light Hazard Occupancies
The Quantity and Combustibility ofThe Quantity and Combustibility of
contents develop at light ratescontents develop at light rates
Includes the following occupancy types:Includes the following occupancy types:
ApartmentsApartments
DormitoriesDormitories
HotelsHotels
SchoolsSchools
Private dwellingPrivate dwelling

12. STRUCTURE FIRE CONTROL INSTRUCTOR12
NFPA 1142NFPA 1142
CONSTRUCTION CLASSIFICATIONCONSTRUCTION CLASSIFICATION
 Construction Class 0.5Construction Class 0.5
This classification is closely related to NFPAThis classification is closely related to NFPA
Type I ConstructionType I Construction
Type I DefinedType I Defined
Structural members include walls, columns,Structural members include walls, columns,
girders, trusses, arches, floor, and roofs that aregirders, trusses, arches, floor, and roofs that are
made of approved non-combustible or limitedmade of approved non-combustible or limited
combustible materialscombustible materials

13. STRUCTURE FIRE CONTROL INSTRUCTOR13
NFPA 1142NFPA 1142
CONSTRUCTION CLASSIFICATIONCONSTRUCTION CLASSIFICATION
 Construction Class 0.5Construction Class 0.5
Each component has a fire rating that it mustEach component has a fire rating that it must
meet:meet:
Exterior Bearing Walls – 4 hour ratingExterior Bearing Walls – 4 hour rating
Interior Bearing Walls – 3 to 4 hour ratingInterior Bearing Walls – 3 to 4 hour rating
Beams, Girders, trusses, and Arches – 3 to 4 hourBeams, Girders, trusses, and Arches – 3 to 4 hour
ratingrating
Floors – 3 hour ratingFloors – 3 hour rating
Roofs – 2 hour ratingRoofs – 2 hour rating

14. STRUCTURE FIRE CONTROL INSTRUCTOR14
NFPA 1142NFPA 1142
CONSTRUCTION CLASSIFICATIONCONSTRUCTION CLASSIFICATION
 Construction Class 0.75Construction Class 0.75
This classification is closely related to NFPAThis classification is closely related to NFPA
Type II and IV (Heavy Timber) ConstructionType II and IV (Heavy Timber) Construction
Type II DefinedType II Defined
Structural members include walls, columns,Structural members include walls, columns,
girders, trusses, arches, floor, and roofs that aregirders, trusses, arches, floor, and roofs that are
made of approved non-combustible or limitedmade of approved non-combustible or limited
combustible materials and shall not have a firecombustible materials and shall not have a fire
resistive rating less than those specified in NFPAresistive rating less than those specified in NFPA
1142 table 6.2.21142 table 6.2.2

15. STRUCTURE FIRE CONTROL INSTRUCTOR15
NFPA 1142NFPA 1142
CONSTRUCTION CLASSIFICATIONCONSTRUCTION CLASSIFICATION
 Construction Class 0.75Construction Class 0.75
Type IV DefinedType IV Defined
This construction is considered to beThis construction is considered to be
construction in which the exterior and interiorconstruction in which the exterior and interior
walls and structural members are portions ofwalls and structural members are portions of
such walls that are approved non-combustible orsuch walls that are approved non-combustible or
limited combustible materials. Other interiorlimited combustible materials. Other interior
structural members, including columns, beams,structural members, including columns, beams,
girders, trusses, arches, floors, and roofs shall begirders, trusses, arches, floors, and roofs shall be
of solid or laminated wood with out concealedof solid or laminated wood with out concealed
spaces.spaces.

16. STRUCTURE FIRE CONTROL INSTRUCTOR16
NFPA 1142NFPA 1142
CONSTRUCTION CLASSIFICATIONCONSTRUCTION CLASSIFICATION
 Construction Class 0.75Construction Class 0.75
Each Type IV component has a minimumEach Type IV component has a minimum
dimension size that it must meet:dimension size that it must meet:
Floor columns not less than 8” all dimensionsFloor columns not less than 8” all dimensions
Roof columns not less than 6” by 8”Roof columns not less than 6” by 8”
Floor beams not less than 6” by 10”Floor beams not less than 6” by 10”
Roof beams not less than 4” by 6”Roof beams not less than 4” by 6”

17. STRUCTURE FIRE CONTROL INSTRUCTOR17
NFPA 1142NFPA 1142
CONSTRUCTION CLASSIFICATIONCONSTRUCTION CLASSIFICATION
 Construction Class 1.0Construction Class 1.0
This classification is closely related to NFPAThis classification is closely related to NFPA
Type III (Ordinary) ConstructionType III (Ordinary) Construction
Type III DefinedType III Defined
Construction that is considered to be the typeConstruction that is considered to be the type
that the exterior walls and structural members arethat the exterior walls and structural members are
of approved non-combustible or limitedof approved non-combustible or limited
combustible materials and interior structuralcombustible materials and interior structural
members are entirely or partially of wood ofmembers are entirely or partially of wood of
smaller dimensions than required for Type IVsmaller dimensions than required for Type IV
constructionconstruction

18. STRUCTURE FIRE CONTROL INSTRUCTOR18
NFPA 1142NFPA 1142
CONSTRUCTION CLASSIFICATIONCONSTRUCTION CLASSIFICATION
 Construction Class 1.5Construction Class 1.5
This classification is closely related to NFPAThis classification is closely related to NFPA
Type V ConstructionType V Construction
Type V DefinedType V Defined
Construction that is considered to be the typeConstruction that is considered to be the type
that the exterior walls and structural members arethat the exterior walls and structural members are
made of wood or other approved combustiblemade of wood or other approved combustible
material smaller than the requirements for Typematerial smaller than the requirements for Type
IV constructionIV construction

19. STRUCTURE FIRE CONTROL INSTRUCTOR19
NFPA 1142NFPA 1142
CALCULATING WATER SUPPLYCALCULATING WATER SUPPLY
 To determine the water supply you haveTo determine the water supply you have
to gather the following information:to gather the following information:
Structural Survey (Total Volume)Structural Survey (Total Volume)
Construction Class NumberConstruction Class Number
Occupancy Hazard ClassOccupancy Hazard Class
ExposuresExposures
This will bite you really bad, especially if youThis will bite you really bad, especially if you
burn down the neighbors barnburn down the neighbors barn

20. STRUCTURE FIRE CONTROL INSTRUCTOR20
NFPA 1142NFPA 1142
CALCULATING WATER SUPPLYCALCULATING WATER SUPPLY
MINIMUM WATER SUPPLYMINIMUM WATER SUPPLY WITHOUTWITHOUT EXPOSURESEXPOSURES
 Total Cubic feet divided by the OHCTotal Cubic feet divided by the OHC
 Multiply this by the CCNMultiply this by the CCN
 Then multiply that number by 1.5 for theThen multiply that number by 1.5 for the
NFPA 1403 required fifty percent reserveNFPA 1403 required fifty percent reserve
 This will give you the Minimum water inThis will give you the Minimum water in
gallons needed for the structure.gallons needed for the structure.
 There will be no less than 2000 gallons ofThere will be no less than 2000 gallons of
water on site when burning a structure.water on site when burning a structure.

21. STRUCTURE FIRE CONTROL INSTRUCTOR21
NFPA 1142NFPA 1142
CALCULATING WATER SUPPLYCALCULATING WATER SUPPLY
MINIMUM WATER SUPPLYMINIMUM WATER SUPPLY WITHOUTWITHOUT EXPOSURESEXPOSURES
 50 ft X 24 ft Type V dwelling with two – 8 ft50 ft X 24 ft Type V dwelling with two – 8 ft
storiesstories
 Pitched roof - 8 ft from attic floor to ridge polePitched roof - 8 ft from attic floor to ridge pole
 With pitched roofs use half the measured distanceWith pitched roofs use half the measured distance
from the attic floor to the ridge pole.from the attic floor to the ridge pole.
 4 ft would be the number for this example4 ft would be the number for this example
 No exposuresNo exposures

22. STRUCTURE FIRE CONTROL INSTRUCTOR22
NFPA 1142NFPA 1142
CALCULATING WATER SUPPLYCALCULATING WATER SUPPLY
MINIMUM WATER SUPPLYMINIMUM WATER SUPPLY WITHOUTWITHOUT EXPOSURESEXPOSURES
50 x 24 x 20 = 24,000 ft.50 x 24 x 20 = 24,000 ft.33
OHC 7OHC 7
CCN 1.5CCN 1.5
24,000 ft.24,000 ft.33
/ OHC 7 x CCN 1.5 x 1.5 =/ OHC 7 x CCN 1.5 x 1.5 =
Gallons of water needed plus 50%Gallons of water needed plus 50%
ReserveReserve

23. STRUCTURE FIRE CONTROL INSTRUCTOR23
NFPA 1142NFPA 1142
CALCULATING WATER SUPPLYCALCULATING WATER SUPPLY
MINIMUM WATER SUPPLYMINIMUM WATER SUPPLY WITHOUTWITHOUT EXPOSURESEXPOSURES
50 x 24 x 20 = 24,000 ft.50 x 24 x 20 = 24,000 ft.33
OHC 7OHC 7
CCN 1.5CCN 1.5
24,000 ft.24,000 ft.33
/ OHC 7 x CCN 1.5 x 1.5 =/ OHC 7 x CCN 1.5 x 1.5 =
77147714
Gallons of water needed plus 50%Gallons of water needed plus 50%
ReserveReserve

24. STRUCTURE FIRE CONTROL INSTRUCTOR24
NFPA 1142NFPA 1142
CALCULATING WATER SUPPLYCALCULATING WATER SUPPLY
MINIMUM WATER SUPPLYMINIMUM WATER SUPPLY WITHOUTWITHOUT EXPOSURESEXPOSURES
PRACTICE:PRACTICE:
125 ft X 100 ft Farm Equipment Storage125 ft X 100 ft Farm Equipment Storage
1 – 14 ft story1 – 14 ft story
Flat roofFlat roof
Type II ConstructionType II Construction

25. STRUCTURE FIRE CONTROL INSTRUCTOR25
NFPA 1142NFPA 1142
CALCULATING WATER SUPPLYCALCULATING WATER SUPPLY
MINIMUM WATER SUPPLYMINIMUM WATER SUPPLY WITHOUTWITHOUT EXPOSURESEXPOSURES
125x 100 x 14 = 175,000 ft.125x 100 x 14 = 175,000 ft.33
OHC 5OHC 5
CCN 0.75CCN 0.75
175,000 ft.175,000 ft.33
/ OHC 5 x CCN 0.75 x 1.5 =/ OHC 5 x CCN 0.75 x 1.5 =
Gallons of water needed plus 50%Gallons of water needed plus 50%
ReserveReserve

26. STRUCTURE FIRE CONTROL INSTRUCTOR26
NFPA 1142NFPA 1142
CALCULATING WATER SUPPLYCALCULATING WATER SUPPLY
MINIMUM WATER SUPPLYMINIMUM WATER SUPPLY WITHOUTWITHOUT EXPOSURESEXPOSURES
125x 100 x 14 = 175,000 ft.125x 100 x 14 = 175,000 ft.33
OHC 5OHC 5
CCN 0.75CCN 0.75
175,000 ft.175,000 ft.33
/ OHC 5 x CCN 0.75 x 1.5 =/ OHC 5 x CCN 0.75 x 1.5 =
39,37539,375
Gallons of water needed plus 50%Gallons of water needed plus 50%
ReserveReserve

27. STRUCTURE FIRE CONTROL INSTRUCTOR27
NFPA 1142NFPA 1142
CALCULATING WATER SUPPLYCALCULATING WATER SUPPLY
MINIMUM WATER SUPPLYMINIMUM WATER SUPPLY WITHWITH EXPOSURESEXPOSURES
 Total Cubic feet divided by the OHCTotal Cubic feet divided by the OHC
 Multiple this by the CCNMultiple this by the CCN
 Then multiply that number by 1.5 for theThen multiply that number by 1.5 for the
NFPA 1403 fifty percent reserve that isNFPA 1403 fifty percent reserve that is
requiredrequired
 This will give you the Minimum water inThis will give you the Minimum water in
gallons needed for the structuregallons needed for the structure

28. STRUCTURE FIRE CONTROL INSTRUCTOR28
NFPA 1142NFPA 1142
CALCULATING WATER SUPPLYCALCULATING WATER SUPPLY
MINIMUM WATER SUPPLYMINIMUM WATER SUPPLY WITHWITH EXPOSURESEXPOSURES
 Then multiply this number by 1.5Then multiply this number by 1.5
 This will give you the minimum waterThis will give you the minimum water
supply required for any structure withsupply required for any structure with
exposures.exposures.
 3000 gallons of water is the minimum3000 gallons of water is the minimum
amount required for structures withamount required for structures with
exposuresexposures

29. STRUCTURE FIRE CONTROL INSTRUCTOR29
NFPA 1142NFPA 1142
CALCULATING WATER SUPPLYCALCULATING WATER SUPPLY
MINIMUM WATER SUPPLYMINIMUM WATER SUPPLY WITHWITH EXPOSURESEXPOSURES
 50 ft X 24 ft dwelling50 ft X 24 ft dwelling
 2 – 8 ft stories2 – 8 ft stories
 Pitched roof - 8 ft from attic floor to ridge polePitched roof - 8 ft from attic floor to ridge pole
 With pitched roofs use half the measured distanceWith pitched roofs use half the measured distance
from the attic floor to the ridge pole.from the attic floor to the ridge pole.
 4 ft would be the number for this example4 ft would be the number for this example
 Type V ConstructionType V Construction
 25 ft X 12 ft exposure building 50’ from the C-25 ft X 12 ft exposure building 50’ from the C-
sideside

30. STRUCTURE FIRE CONTROL INSTRUCTOR30
NFPA 1142NFPA 1142
CALCULATING WATER SUPPLYCALCULATING WATER SUPPLY
MINIMUM WATER SUPPLYMINIMUM WATER SUPPLY WITHWITH EXPOSURESEXPOSURES
50 x 24 x 20 = 24,000 ft.50 x 24 x 20 = 24,000 ft.33
OHC 7OHC 7
CCN 1.5CCN 1.5
24,000 ft.24,000 ft.33
/ OHC 7 x CCN 1.5 x 1.5 (Reserve)/ OHC 7 x CCN 1.5 x 1.5 (Reserve)
x 1.5 (Exposure)=x 1.5 (Exposure)=
Gallons of Water needed plus 50% forGallons of Water needed plus 50% for
Reserve and ExposureReserve and Exposure

31. STRUCTURE FIRE CONTROL INSTRUCTOR31
NFPA 1142NFPA 1142
CALCULATING WATER SUPPLYCALCULATING WATER SUPPLY
MINIMUM WATER SUPPLYMINIMUM WATER SUPPLY WITHWITH EXPOSURESEXPOSURES
50 x 24 x 20 = 24,000 ft.50 x 24 x 20 = 24,000 ft.33
OHC 7OHC 7
CCN 1.5CCN 1.5
24,000 ft.24,000 ft.33
/ OHC 7 x CCN 1.5 x 1.5 (Reserve)/ OHC 7 x CCN 1.5 x 1.5 (Reserve)
x 1.5 (Exposure)=x 1.5 (Exposure)=
11,57111,571
Gallons of Water needed plus 50%Gallons of Water needed plus 50%
Reserve and ExposureReserve and Exposure

32. STRUCTURE FIRE CONTROL INSTRUCTOR32
NFPA 1142NFPA 1142
CALCULATING WATER SUPPLYCALCULATING WATER SUPPLY
MINIMUM WATER SUPPLYMINIMUM WATER SUPPLY WITHWITH EXPOSURESEXPOSURES
PRACTICE:PRACTICE:
125 ft X 100 ft Farm Equipment Storage125 ft X 100 ft Farm Equipment Storage
1 – 14 ft story1 – 14 ft story
Flat roofFlat roof
Non-Combustible ConstructionNon-Combustible Construction
50ft X 25ft exposure building 25 feet from50ft X 25ft exposure building 25 feet from
side Bside B

33. STRUCTURE FIRE CONTROL INSTRUCTOR33
NFPA 1142NFPA 1142
CALCULATING WATER SUPPLYCALCULATING WATER SUPPLY
MINIMUM WATER SUPPLYMINIMUM WATER SUPPLY WITHWITH EXPOSURESEXPOSURES
125x 100 x 14 = 175,000125x 100 x 14 = 175,000 ft.ft.33
OHC 5OHC 5
CCN 0.75CCN 0.75
175,000175,000 ft.ft.33
/ OHC 5 x CCN 0.75 x/ OHC 5 x CCN 0.75 x
1.5 (Reserve) x 1.5 (Exposure) =1.5 (Reserve) x 1.5 (Exposure) =
Gallons of water needed plus 50% reserveGallons of water needed plus 50% reserve

34. STRUCTURE FIRE CONTROL INSTRUCTOR34
NFPA 1142NFPA 1142
CALCULATING WATER SUPPLYCALCULATING WATER SUPPLY
MINIMUM WATER SUPPLYMINIMUM WATER SUPPLY WITHWITH EXPOSURESEXPOSURES
125x 100 x 14 = 175,000125x 100 x 14 = 175,000 ft.ft.33
OHC 5OHC 5
CCN 0.75CCN 0.75
175,000175,000 ft.ft.33
/ OHC 5 x CCN 0.75 x/ OHC 5 x CCN 0.75 x
1.5 (Reserve) x 1.5 (Exposure) =1.5 (Reserve) x 1.5 (Exposure) =
59,06259,062
Gallons of water needed plus 50% reserveGallons of water needed plus 50% reserve
and exposure.and exposure.

35. STRUCTURE FIRE CONTROL INSTRUCTOR35
NFPA 1142NFPA 1142
Pre-Calculated ValuesPre-Calculated Values
 You can refer to NFPA 1142 and find theYou can refer to NFPA 1142 and find the
pre-calculated numbers.pre-calculated numbers.
This works great for an estimated numberThis works great for an estimated number
It is still best to calculate the numbersIt is still best to calculate the numbers
yourself.yourself.

36. STRUCTURE FIRE CONTROL INSTRUCTOR36
Water Supply LayoutWater Supply Layout

37. STRUCTURE FIRE CONTROL INSTRUCTOR37
REVIEW ENABLING OBJECTIVESREVIEW ENABLING OBJECTIVES
We have identified & described the purpose ofWe have identified & described the purpose of
NFPA 1142.NFPA 1142.
We have identified & described the occupancyWe have identified & described the occupancy
hazard classifications found in NFPA 1142.hazard classifications found in NFPA 1142.
We have identified & described theWe have identified & described the
construction classification numbers found inconstruction classification numbers found in
NFPA 1142.NFPA 1142.
We have determined minimum water supplyWe have determined minimum water supply
requirements, including a 50% reserve, forrequirements, including a 50% reserve, for
conducting live fire training evolutions in aconducting live fire training evolutions in a
structure.structure.

38. STRUCTURE FIRE CONTROL INSTRUCTOR38
END OF SECTIONEND OF SECTION
END OF SECTIONEND OF SECTION
ONON
NFPA 1142NFPA 1142
FAMILIARIZATIONFAMILIARIZATION