Loading…

Flash Player 9 (or above) is needed to view presentations.
We have detected that you do not have it on your computer. To install it, go here.

Like this presentation? Why not share!

1142 familiarization

on

  • 1,954 views

 

Statistics

Views

Total Views
1,954
Views on SlideShare
1,954
Embed Views
0

Actions

Likes
0
Downloads
19
Comments
0

0 Embeds 0

No embeds

Accessibility

Upload Details

Uploaded via as Microsoft PowerPoint

Usage Rights

© All Rights Reserved

Report content

Flagged as inappropriate Flag as inappropriate
Flag as inappropriate

Select your reason for flagging this presentation as inappropriate.

Cancel
  • Full Name Full Name Comment goes here.
    Are you sure you want to
    Your message goes here
    Processing…
Post Comment
Edit your comment

1142 familiarization 1142 familiarization Presentation Transcript

  • NFPA 1142 FAMILIARIZATION
  • TERMINAL PERFORMANCE OBJECTIVE The student shall determine the minimum water supply necessary to conduct live fire training evolutions in an acquired structure or training center burn building, according to NFPA 1142, Standard on Water Supplies for Suburban and Rural Fire Fighting.
  • ENABLING OBJECTIVES
    • Identify & describe the purpose of NFPA 1142.
    • Identify & describe the occupancy hazard classifications found in NFPA 1142.
    • Identify & describe the construction classification numbers found in NFPA 1142.
    • Determine minimum water supply requirements, including a 50% reserve, for conducting live fire training evolutions in a structure.
  • PURPOSE OF NFPA 1142 NFPA 1142, Standard on Water Supplies for Suburban and Rural Fire Fighting contains formulae for determining the minimum amount of water that must be available on site when conducting structure fire control training.
  • NFPA 1142 WATER SUPPLY
    • Instructor-in-charge shall ensure that:
      • the onsite water meets the required or needed water supply for the given structure
      • water supply meets requirements of NFPA 1142
      • a minimum reserve of water be available for each evolution
      • attack lines and backup line are feed from separate water sources
  • NFPA 1142 WATER SUPPLY
    • Understanding NFPA 1142 and how it works with NFPA 1403
      • What information do you need to gather to determine the needed water for the structure?
        • Occupancy Hazard Classification
        • Construction Classification
        • Structural Dimensions
        • Exposures
  • NFPA 1142 OCCUPANCY HAZARD CLASSES
    • OHC 3
      • Considered Severe Hazard Occupancies
      • These structures shall be considered an exposure no mater what there size
      • Includes the following occupancy types:
        • Cereal mills
        • Explosives manufacturing/storage
        • Saw mills
        • Plastic processing facilities
  • NFPA 1142 OCCUPANCY HAZARD CLASSES
    • OHC 4
      • Considered High Hazard Occupancies
      • These structures shall be considered an exposure no mater what there size
      • Includes the following occupancy types:
        • Commercial barns and stables
        • Building materials supply storage
        • Department stores
        • Theaters
  • NFPA 1142 OCCUPANCY HAZARD CLASSES
    • OHC 5
      • Considered Moderate Hazard Occupancies
      • The quantity and combustibility of contents develop at moderate rates.
      • Includes the following occupancy types:
        • Clothing manufacturing
        • Libraries with large stock rooms
        • Laundries
        • Tobacco barns
        • Restaurants
  • NFPA 1142 OCCUPANCY HAZARD CLASSES
    • OHC 6
      • Considered Low Hazard Occupancies
      • The quantity and combustibility of contents develop at low rates
      • Includes the following occupancy types:
        • Churches
        • Municipal buildings
        • Service stations
  • NFPA 1142 OCCUPANCY HAZARD CLASSES
    • OHC 7
      • Considered Light Hazard Occupancies
      • The Quantity and Combustibility of contents develop at light rates
      • Includes the following occupancy types:
        • Apartments
        • Dormitories
        • Hotels
        • Schools
        • Private dwelling
  • NFPA 1142 CONSTRUCTION CLASSIFICATION
    • Construction Class 0.5
      • This classification is closely related to NFPA Type I Construction
      • Type I Defined
        • Structural members include walls, columns, girders, trusses, arches, floor, and roofs that are made of approved non-combustible or limited combustible materials
  • NFPA 1142 CONSTRUCTION CLASSIFICATION
    • Construction Class 0.5
      • Each component has a fire rating that it must meet:
        • Exterior Bearing Walls – 4 hour rating
        • Interior Bearing Walls – 3 to 4 hour rating
        • Beams, Girders, trusses, and Arches – 3 to 4 hour rating
        • Floors – 3 hour rating
        • Roofs – 2 hour rating
  • NFPA 1142 CONSTRUCTION CLASSIFICATION
    • Construction Class 0.75
      • This classification is closely related to NFPA Type II and IV (Heavy Timber) Construction
      • Type II Defined
        • Structural members include walls, columns, girders, trusses, arches, floor, and roofs that are made of approved non-combustible or limited combustible materials and shall not have a fire resistive rating less than those specified in NFPA 1142 table 6.2.2
  • NFPA 1142 CONSTRUCTION CLASSIFICATION
    • Construction Class 0.75
      • Type IV Defined
        • This construction is considered to be construction in which the exterior and interior walls and structural members are portions of such walls that are approved non-combustible or limited combustible materials. Other interior structural members, including columns, beams, girders, trusses, arches, floors, and roofs shall be of solid or laminated wood with out concealed spaces.
  • NFPA 1142 CONSTRUCTION CLASSIFICATION
    • Construction Class 0.75
      • Each Type IV component has a minimum dimension size that it must meet:
        • Floor columns not less than 8” all dimensions
        • Roof columns not less than 6” by 8”
        • Floor beams not less than 6” by 10”
        • Roof beams not less than 4” by 6”
  • NFPA 1142 CONSTRUCTION CLASSIFICATION
    • Construction Class 1.0
      • This classification is closely related to NFPA Type III (Ordinary) Construction
      • Type III Defined
        • Construction that is considered to be the type that the exterior walls and structural members are of approved non-combustible or limited combustible materials and interior structural members are entirely or partially of wood of smaller dimensions than required for Type IV construction
  • NFPA 1142 CONSTRUCTION CLASSIFICATION
    • Construction Class 1.5
      • This classification is closely related to NFPA Type V Construction
      • Type V Defined
        • Construction that is considered to be the type that the exterior walls and structural members are made of wood or other approved combustible material smaller than the requirements for Type IV construction
  • NFPA 1142 CALCULATING WATER SUPPLY
    • To determine the water supply you have to gather the following information:
      • Structural Survey (Total Volume)
      • Construction Class Number
      • Occupancy Hazard Class
      • Exposures
        • This will bite you really bad, especially if you burn down the neighbors barn
  • NFPA 1142 CALCULATING WATER SUPPLY MINIMUM WATER SUPPLY WITHOUT EXPOSURES
    • Total Cubic feet divided by the OHC
    • Multiply this by the CCN
    • Then multiply that number by 1.5 for the NFPA 1403 required fifty percent reserve
    • This will give you the Minimum water in gallons needed for the structure.
    • There will be no less than 2000 gallons of water on site when burning a structure.
  • NFPA 1142 CALCULATING WATER SUPPLY MINIMUM WATER SUPPLY WITHOUT EXPOSURES
    • 50 ft X 24 ft Type V dwelling with two – 8 ft stories
    • Pitched roof - 8 ft from attic floor to ridge pole
      • With pitched roofs use half the measured distance from the attic floor to the ridge pole.
    • 4 ft would be the number for this example
    • No exposures
  • NFPA 1142 CALCULATING WATER SUPPLY MINIMUM WATER SUPPLY WITHOUT EXPOSURES
    • 50 x 24 x 20 = 24,000 ft. 3
    • OHC 7
    • CCN 1.5
    • 24,000 ft. 3 / OHC 7 x CCN 1.5 x 1.5 =
    • Gallons of water needed plus 50% Reserve
  • NFPA 1142 CALCULATING WATER SUPPLY MINIMUM WATER SUPPLY WITHOUT EXPOSURES
    • 50 x 24 x 20 = 24,000 ft. 3
    • OHC 7
    • CCN 1.5
    • 24,000 ft. 3 / OHC 7 x CCN 1.5 x 1.5 =
    • 7714
    • Gallons of water needed plus 50% Reserve
  • NFPA 1142 CALCULATING WATER SUPPLY MINIMUM WATER SUPPLY WITHOUT EXPOSURES
    • PRACTICE:
      • 125 ft X 100 ft Farm Equipment Storage
      • 1 – 14 ft story
      • Flat roof
      • Type II Construction
  • NFPA 1142 CALCULATING WATER SUPPLY MINIMUM WATER SUPPLY WITHOUT EXPOSURES
    • 125x 100 x 14 = 175,000 ft. 3
    • OHC 5
    • CCN 0.75
    • 175,000 ft. 3 / OHC 5 x CCN 0.75 x 1.5 =
    • Gallons of water needed plus 50% Reserve
  • NFPA 1142 CALCULATING WATER SUPPLY MINIMUM WATER SUPPLY WITHOUT EXPOSURES
    • 125x 100 x 14 = 175,000 ft. 3
    • OHC 5
    • CCN 0.75
    • 175,000 ft. 3 / OHC 5 x CCN 0.75 x 1.5 =
    • 39,375
    • Gallons of water needed plus 50% Reserve
  • NFPA 1142 CALCULATING WATER SUPPLY MINIMUM WATER SUPPLY WITH EXPOSURES
    • Total Cubic feet divided by the OHC
    • Multiple this by the CCN
    • Then multiply that number by 1.5 for the NFPA 1403 fifty percent reserve that is required
    • This will give you the Minimum water in gallons needed for the structure
  • NFPA 1142 CALCULATING WATER SUPPLY MINIMUM WATER SUPPLY WITH EXPOSURES
    • Then multiply this number by 1.5
    • This will give you the minimum water supply required for any structure with exposures.
    • 3000 gallons of water is the minimum amount required for structures with exposures
  • NFPA 1142 CALCULATING WATER SUPPLY MINIMUM WATER SUPPLY WITH EXPOSURES
    • 50 ft X 24 ft dwelling
    • 2 – 8 ft stories
    • Pitched roof - 8 ft from attic floor to ridge pole
      • With pitched roofs use half the measured distance from the attic floor to the ridge pole.
    • 4 ft would be the number for this example
    • Type V Construction
    • 25 ft X 12 ft exposure building 50’ from the C-side
  • NFPA 1142 CALCULATING WATER SUPPLY MINIMUM WATER SUPPLY WITH EXPOSURES
    • 50 x 24 x 20 = 24,000 ft. 3
    • OHC 7
    • CCN 1.5
    • 24,000 ft. 3 / OHC 7 x CCN 1.5 x 1.5 (Reserve) x 1.5 (Exposure)=
    • Gallons of Water needed plus 50% for Reserve and Exposure
  • NFPA 1142 CALCULATING WATER SUPPLY MINIMUM WATER SUPPLY WITH EXPOSURES
    • 50 x 24 x 20 = 24,000 ft. 3
    • OHC 7
    • CCN 1.5
    • 24,000 ft. 3 / OHC 7 x CCN 1.5 x 1.5 (Reserve) x 1.5 (Exposure)=
    • 11,571
    • Gallons of Water needed plus 50% Reserve and Exposure
  • NFPA 1142 CALCULATING WATER SUPPLY MINIMUM WATER SUPPLY WITH EXPOSURES
    • PRACTICE:
      • 125 ft X 100 ft Farm Equipment Storage
      • 1 – 14 ft story
      • Flat roof
      • Non-Combustible Construction
      • 50ft X 25ft exposure building 25 feet from side B
  • NFPA 1142 CALCULATING WATER SUPPLY MINIMUM WATER SUPPLY WITH EXPOSURES
    • 125x 100 x 14 = 175,000 ft. 3
    • OHC 5
    • CCN 0.75
    • 175,000 ft. 3 / OHC 5 x CCN 0.75 x 1.5 (Reserve) x 1.5 (Exposure) =
    • Gallons of water needed plus 50% reserve
  • NFPA 1142 CALCULATING WATER SUPPLY MINIMUM WATER SUPPLY WITH EXPOSURES
    • 125x 100 x 14 = 175,000 ft. 3
    • OHC 5
    • CCN 0.75
    • 175,000 ft. 3 / OHC 5 x CCN 0.75 x 1.5 (Reserve) x 1.5 (Exposure) =
    • 59,062
    • Gallons of water needed plus 50% reserve and exposure.
  • NFPA 1142 Pre-Calculated Values
    • You can refer to NFPA 1142 and find the pre-calculated numbers.
      • This works great for an estimated number
      • It is still best to calculate the numbers yourself.
  • Water Supply Layout
  • REVIEW ENABLING OBJECTIVES
    • We have identified & described the purpose of NFPA 1142.
    • We have identified & described the occupancy hazard classifications found in NFPA 1142.
    • We have identified & described the construction classification numbers found in NFPA 1142.
    • We have determined minimum water supply requirements, including a 50% reserve, for conducting live fire training evolutions in a structure.
  • END OF SECTION END OF SECTION ON NFPA 1142 FAMILIARIZATION