national fire protection association report - nfpa.org · pdf filesecond revision no. 160-nfpa...

Second Revision No. 1-NFPA 13-2014 [ Global Comment ]

6.3.6 Brass Pipe,

6.3.7 Stainless Steel

6.3.8 Metallic Pipe and Tube bending

6.3.9 Non-Metallic Pipe

6.3.10 Listed Pipe and Tubing

6.3.11 Pipe and Tubing Identification

Submitter Information Verification

Submitter Full Name: Matthew Klaus

Organization: National Fire Protection Assoc

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Submittal Date: Tue Jun 03 07:10:19 EDT 2014

Committee Statement

CommitteeStatement:

Section 6.3.6 through 6.3.11 should be renumbered as proposed. The technical changes made to these sections viaother First and Second Revisions should be incorporated into the First Draft. This is strictly a restructuring of 6.3.6 forclarity. This second revision is based upon FR-59.

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National Fire Protection Association Report http://submittals.nfpa.org/TerraViewWeb/ContentFetcher?commentPara...

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Second Revision No. 56-NFPA 13-2014 [ Global Comment ]

Update the metric conversions to Chapters 1,2,3,4,6,7,8,25,26 and 27 and the associated annex sections based on thework done by the Metric Task Group (see attached spreadsheet).

Supplemental Information

File Name Description

13_Metrification_AUT-SSI.xlsx metric


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Committee Statement

CommitteeStatement:

The conversions proposed for the 2016 edition will be based on a soft conversion scheme as opposed to thetraditional hard conversion. The attached spreadsheet provides the proposed conversion.

ResponseMessage:

Public Comment No. 145-NFPA 13-2014 [Section No. 8.11.2.2.2]


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Location Section Value (eng) Units (eng) SI Exact Conv. SI Adjusted SI Units Notes (LGK)

Index

C, Page 426 Rack Storage Over 25 ft in height 25 ft 7.62 7.6 m

C, Page 426 Up to and including 25 ft in height 25 ft 7.62 7.6 m

I, Page 432 Storage up to and including 25 ft in height 25 ft 7.62 7.6 m

P, Page 436 Over 25 ft height 25 ft 7.62 7.6 m

P, Page 436 Up to and including 25 ft in height 25 ft 7.62 7.6 m

R, Page 437 Storage up to and including 25 ft in height 25 ft 7.62 7.6 m

Second Revision No. 57-NFPA 13-2014 [ New Section after 1.6.2 ]

1.6.3*

Some dimensions used in this standard are exact and some are not. Nominal dimension are often used, such as thedimensions used for pipe sizes. The metric equivalent shown in this standard might not be an exact or “hard” conversion tothe SI unit, but the nominal metric equivalent is typically used or a reasonably equivalent value of “soft” conversion is used. Itshall be acceptable to use the exact, “hard” conversion or the conversions stated in the standard, even though they might notbe exact.



13_SR_57_A.1.6.3_edited.docx




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Committee Statement

CommitteeStatement:

In general “soft” (approximate) conversions were used throughout the standard during the reassessment of metric values.As most of the values in NFPA 13 were not intended as precise values, “hard” (exact) conversions imply a greater degree ofaccuracy than was originally intended. For example, 40,000 sqft converts to 3716.12 m2. The Metric Task Group felt that asoft conversion of 3720 m2 is in line with the original intent of the committee; it is not necessary to maintain a hard, or exact,conversion of 3716 m2. Several values in NFPA 13 were selected as they are round numbers. A pressure 175 psi isrequired, not because it is any more accurate than 174 psi or 176 psi, but because it is an easier number to measure.Round values (most often approximated to the nearest 5 or 10) were used in the majority of conversions as the Metric TaskGroup felt values any more exact implied a greater degree of accuracy than was originally intended by the TechnicalCommittees. The idea of soft conversions is most noticeable in the inch-mm conversions. The Metric Task Group elected tofollow a policy of 1 in = 25 mm. Examples of inch-mm conversions, as used in this project, can be found in the table to theright.

Values under 1 meter (39.5 inches) were converted to mm; values over 1 meter were converted to m, regardless of the unitsoriginally in the document.

In general 3 digit conversions were rounded to the nearest 0 or 5 as a final digit and 4 digit numbers were rounded to thenearest 50 or 00 for the two final digits. There are many exceptions to this guideline due to the type of unit being used,however. As mentioned previously, 40,000 sqft was converted to 3720 m2 instead of the soft value of 3700 m2.

ResponseMessage:

Public Comment No. 188-NFPA 13-2014 [Section No. 1.6]


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A.1.6.3 Some dimensions used in this standard require a tight precision and others do not. For example, when performing hydraulic calculations more precision is required than when specifying a nominal dimension. An example is pipe sizes, where we typically refer to a nominal diameter rather than the exact diameter. The metric equivalents also have a set of generally accepted nominal measurements, and they are not a precise conversion from the “English Unit” nominal dimension. Throughout the standard the generally accepted nominal pipe sizes have been used. For example 1 in. pipe = 25 mm, 1¼ in. pipe = 32 mm, 1½ in. pipe = 40 mm, and so forth. In other cases rounding is used, and the number of significant digits taken into account. For example, a 30 ft ceiling would be 9.144 m. This implies a level of precision that is higher than used for the original dimension, and a conversion to 9.1 m or even 9 m is more appropriate. Another example is that in the standard, 1 in. has been converted to 25 mm and not 25.4 mm, 2 in. to 50 mm, 6 in. to 150 mm, and so forth. Finally, locally available material can have different characteristics in countries that use metric units than are typically found in the U.S. Examples are things like standard door or window sizes, rack dimensions, and so forth. In these cases a soft conversion can also be used. Where soft conversions have been used, it is acceptable for a designer or installer to use an exact or “hard" conversion rather than the soft conversion used in the standard.

Second Revision No. 160-NFPA 13-2014 [ Section No. 2.2 ]

2.2 NFPA Publications.

National Fire Protection Association, 1 Batterymarch Park, Quincy, MA 02169-7471.

NFPA 11, Standard for Low-, Medium-, and High-Expansion Foam, 2010 2015 edition.

NFPA 14, Standard for the Installation of Standpipe and Hose Systems, 2010 2013 edition.

NFPA 15, Standard for Water Spray Fixed Systems for Fire Protection, 2012 edition.

NFPA 16, Standard for the Installation of Foam-Water Sprinkler and Foam-Water Spray Systems, 2011 2015 edition.

NFPA 17, Standard for Dry Chemical Extinguishing Systems, 2009 2013 edition.

NFPA 20, Standard for the Installation of Stationary Pumps for Fire Protection, 2013 2016 edition.

NFPA 22, Standard for Water Tanks for Private Fire Protection, 2008 2013 edition.

NFPA 24, Standard for the Installation of Private Fire Service Mains and Their Appurtenances, 2013 2016 edition.

NFPA 25, Standard for the Inspection, Testing, and Maintenance of Water-Based Fire Protection Systems, 2011 2014 edition.

NFPA 30, Flammable and Combustible Liquids Code, 2012 2015 edition.

NFPA 30B, Code for the Manufacture and Storage of Aerosol Products, 2011 2015 edition.

NFPA 33, Standard for Spray Application Using Flammable or Combustible Materials, 2011 2015 edition.

NFPA 40, Standard for the Storage and Handling of Cellulose Nitrate Film, 2011 2016 edition.

NFPA 51B, Standard for Fire Prevention During Welding, Cutting, and Other Hot Work, 2009 2014 edition.

NFPA 70®, National Electrical Code®, 2011 2014 edition.

NFPA 72®, National Fire Alarm and Signaling Code, 2013 2016 edition.

NFPA 82, Standard on Incinerators and Waste and Linen Handling Systems and Equipment, 2009 2014 edition.

NFPA 96, Standard for Ventilation Control and Fire Protection of Commercial Cooking Operations, 2011 2014 edition.

NFPA 101®, Life Safety Code®, 2012 2015 edition.

NFPA 120, Standard for Fire Prevention and Control in Coal Mines, 2010 2015 edition.

NFPA 170, Standard for Fire Safety and Emergency Symbols, 2012 2015 edition.

NFPA 214, Standard on Water-Cooling Towers, 2011 edition.

NFPA 259, Standard Test Method for Potential Heat of Building Materials, 2008 2013 edition.

NFPA 400, Hazardous Materials Code, 2013 2016 edition.

NFPA 409, Standard on Aircraft Hangars, 2011 2016 edition.

NFPA 703, Standard for Fire Retardant–Treated Wood and Fire-Retardant Coatings for Building Materials, 2012 2015 edition.

NFPA 750, Standard on Water Mist Fire Protection Systems, 2010 2014 edition.

NFPA 780, Standard for the Installation of Lightning Protection Systems, 2011 2014 edition.

NFPA 804, Standard for Fire Protection for Advanced Light Water Reactor Electric Generating Plants, 2010 2015 edition.

NFPA 909, Code for the Protection of Cultural Resource Properties — Museums, Libraries, and Places of Worship, 2010 2013edition.

NFPA 1963, Standard for Fire Hose Connections, 2009 2014 edition.




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Submittal Date: Mon Aug 11 07:22:55 EDT 2014

Committee Statement


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Committee Statement: Editorial revision to update referenced documents to the most recent versions.

Response Message:


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Second Revision No. 13-NFPA 13-2014 [ Section No. 2.3.2 ]

2.3.2 ASCE Publications.

American Society of Civil Engineers, 1801 Alexander Bell Drive, Reston, VA 20191-4400.

SEI/ASCE 7-10 including Supplement 1 , Minimum Design Loads of Buildings and Other Structures, 2010 2013 .




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Submittal Date: Sun Jun 22 17:36:23 EDT 2014

Committee Statement

Committee Statement: Updating reference to the latest edition.

Response Message:


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2.3.3 ASME Publications.

American Society of Mechanical Engineers, Three Two Park Avenue, New York, NY 10016-5990.

ASME Boiler and Pressure Vessel Code, Section IX — “Welding and Brazing Qualifications,” 2004.

ASME A17.1, Safety Code for Elevators and Escalators, 2010/CSA B44-10.

ASME B1.20.1, Pipe Threads, General Purpose (Inch), 2001.

ASME B16.1, Cast Iron Pipe Flanges and Flanged Fittings, Classes 25, 125, and 250, 1998.

ASME B16.3, Malleable Iron Threaded Fittings, Classes 150 and 300, 1998.

ASME B16.4, Cast Iron Threaded Fittings, Classes 125 and 250, 1998.

ASME B16.5, Pipe Flanges and Flanged Fittings, 1996.

ASME B16.9, Factory-Made Wrought Steel Buttwelding Fittings, 2001.

ASME B16.11, Forged Steel Fittings, Socket-Welding and Threaded, 1996.

ASME B16.15, Cast Copper Alloy Threaded Fittings Classes 125 and 250 , 2011.

ASME B16.18, Cast Copper Alloy Solder Joint Pressure Fittings, 1994.

ASME B16.22, Wrought Copper and Copper Alloy Solder Joint Pressure Fittings, 1995.

ASME B16.25, Buttwelding Ends, 1997.

ANSI/ASME B31.1, Code for Power Piping, 2001.

ANSI/ASME B36.10M, Welded and Seamless Wrought Steel Pipe, 2000.




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Submittal Date: Wed Jul 02 08:47:04 EDT 2014

Committee Statement

Committee Statement: ASME B16.15 was incorrectly identified as an ASTM standard in the previous edition.

Response Message:


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2.3.4 ASTM Publications.

ASTM International, 100 Barr Harbor Drive, P.O. Box C700, West Conshohocken, PA 19428-2959.

ANSI/ASTM A 53 A53/A53M , Standard Specification for Pipe, Steel, Black and Hot-Dipped, Zinc-Coated, Welded andSeamless, 2001 2012 .

ASTM A 106 A106/A106M , Standard Specification for Seamless Carbon Steel Pipe for High Temperature Service, 2008 2013 .

ASTM A 135 A135/A135M , Standard Specification for Electric-Resistance-Welded Steel Pipe, 2001 2009 (2014) .

ASTM A 153A/153M A153A/153M , Standard Specification for Zinc Coating (Hot Dip) on Iron and Steel Hardware, 2004 2009 .

ASTM A 234 A234/A234M , Standard Specification for Piping Fittings of Wrought-Carbon Steel and Alloy Steel for Moderateand High Temperature Service, 2001 2013 e1 .

ASTM A 795 A795/A795M , Standard Specification for Black and Hot-Dipped Zinc-Coated (Galvanized) Welded and SeamlessSteel Pipe for Fire Protection Use, 2000 2013 .

ASTM B 16.15, Cast Bronze Threaded Fittings , 1985.

ASTM B 32 B32 , Standard Specification for Solder Metal, 2000 2008 .

ASTM B 43 B43 , Specification for Seamless Red Brass Pipe, 2009.

ASTM B 75 B75 , Standard Specification for Seamless Copper Tube, 1999 2011 .

ASTM B 88 B88 , Standard Specification for Seamless Copper Water Tube, 1999 2009 .

ASTM B 251 B251 , Standard Specification for General Requirements for Wrought Seamless Copper and Copper-Alloy Tube,1997 2010 .

ASTM B 446 B446 , Standard Specification for Nickel-Chromium-Molybdenum-Columbium Alloy (UNSN 06625) and Nickel-Chromium-Molybdenum-Silicon Alloy (UNSN 06219) Rod and Bar, 2000 2003 (2008) e1 .

ASTM B 813 B813 , Standard Specification for Liquid and Paste Fluxes for Soldering Applications of Copper and Copper-AlloyTube, 2000 2010 .

ASTM B 828 B828 , Standard Practice for Making Capillary Joints by Soldering of Copper and Copper Alloy Tube and Fittings,2000 2002 (2010) .

ASTM C 635 C635 , Standard Specification for the Manufacture, Performance, and Testing of Metal Suspension Systems forAcoustical Tile and Lay-In Panel Ceilings, 2012 2013a12 .

ASTM C 636 C636 , Standard Practice for Installation of Metal Ceiling Suspension Systems for Acoustical Tile and Lay-InPanels, 2008 2013 .

ASTM E 84 E84 , Standard Test Method for Surface Burning Characteristics of Building Materials,2010 2014 .

ASTM E 119 E119 , Standard Test Methods for Fire Tests of Building Construction and Materials, 2010 2012a .

ASTM E 136 E136 , Standard Test Method for Behavior of Materials in a Vertical Tube Furnace at 750°C, 1999 2012 .

ASTM F 437 F437 , Standard Specification for Threaded Chlorinated Poly (Vinyl Chloride) (CPVC) Plastic Pipe Fittings,Schedule 80, 1999 2009 .

ASTM F 438 F438 , Standard Specification for Socket-Type Chlorinated Poly (Vinyl Chloride) (CPVC) Plastic Pipe Fittings,Schedule 40, 2001 2009 .

ASTM F 439 F439 , Standard Specification for Socket-Type Chlorinated Poly (Vinyl Chloride) (CPVC) Plastic Pipe Fittings,Schedule 80, 2001 2013 .

ASTM F 442 F442/F442M , Standard Specification for Chlorinated Poly (Vinyl Chloride) (CPVC) Plastic Pipe (SDR-PR),2009 2013e1 .

ASTM F 1121 F1121 , Standard Specification for International Shore Connections for Marine Fire Applications, 1998 87(2010) .

ASTM SI 10 SI10 , Standard for Use of the International System of Units (SI): The Modern Metric System, 1997 2010 .




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Submittal Date: Mon Jun 23 11:54:58 EDT 2014

Committee Statement

Committee Statement: This revision updates the referenced publications based on the most current edition.

Response Message:

Public Comment No. 149-NFPA 13-2014 [Section No. 2.3.4]



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2.4 References for Extracts in Mandatory Sections.

NFPA 1, Fire Code, 2012 2015 edition.

NFPA 24, Standard for the Installation of Private Fire Service Mains and Their Appurtenances, 2013 2016 edition.

NFPA 33, Standard for Spray Application Using Flammable or Combustible Materials, 2011 2015 edition.

NFPA 37, Standard for the Installation and Use of Stationary Combustion Engines and Gas Turbines, 2010 2015 edition.

NFPA 40, Standard for the Storage and Handling of Cellulose Nitrate Film, 2011 2016 edition.

NFPA 45, Standard on Fire Protection for Laboratories Using Chemicals, 2011 2015 edition.

NFPA 51, Standard for the Design and Installation of Oxygen–Fuel Gas Systems for Welding, Cutting, and Allied Processes,2013 edition.

NFPA 51A, Standard for Acetylene Cylinder Charging Plants, 2012 edition.

NFPA 55, Compressed Gases and Cryogenic Fluids Code, 2013 2016 edition.

NFPA 59, Utility LP-Gas Plant Code, 2012 2015 edition.

NFPA 59A, Standard for the Production, Storage, and Handling of Liquefied Natural Gas (LNG), 2013 edition.

NFPA 70®, National Electrical Code®, 2011 2014 edition.

NFPA 75, Standard for the Fire Protection of Information Technology Equipment, 2013 edition.

NFPA 76, Standard for the Fire Protection of Telecommunications Facilities, 2012 edition.

NFPA 82, Standard on Incinerators and Waste and Linen Handling Systems and Equipment, 2009 2014 edition.

NFPA 86, Standard for Ovens and Furnaces, 2011 2015 edition.

NFPA 91, Standard for Exhaust Systems for Air Conveying of Vapors, Gases, Mists, and Noncombustible Particulate Solids,2010 2015 edition.

NFPA 99, Health Care Facilities Code, 2012 2015 edition.

NFPA 99B, Standard for Hypobaric Facilities, 2010 2015 edition.

NFPA 120, Standard for Fire Prevention and Control in Coal Mines, 2010 2015 edition.

NFPA 122, Standard for Fire Prevention and Control in Metal/Nonmetal Mining and Metal Mineral Processing Facilities,2010 2015 edition.

NFPA 130, Standard for Fixed Guideway Transit and Passenger Rail Systems, 2010 2014 edition.

NFPA 140, Standard on Motion Picture and Television Production Studio Soundstages, Approved Production Facilities, andProduction Locations, 2008 2013 edition.

NFPA 150, Standard on Fire and Life Safety in Animal Housing Facilities, 2013 2016 edition.

NFPA 214, Standard on Water-Cooling Towers, 2011 edition.

NFPA 307, Standard for the Construction and Fire Protection of Marine Terminals, Piers, and Wharves, 2011 2016 edition.

NFPA 318, Standard for the Protection of Semiconductor Fabrication Facilities, 2012 2015 edition.

NFPA 400, Hazardous Materials Code, 2013 2016 edition.

NFPA 415, Standard on Airport Terminal Buildings, Fueling Ramp Drainage, and Loading Walkways, 2013 edition.

NFPA 423, Standard for Construction and Protection of Aircraft Engine Test Facilities, 2010 2016 edition.

NFPA 804, Standard for Fire Protection for Advanced Light Water Reactor Electric Generating Plants, 2010 2015 edition.

NFPA 805, Performance-Based Standard for Fire Protection for Light Water Reactor Electric Generating Plants, 2010 2015edition.

NFPA 851, Recommended Practice for Fire Protection for Hydroelectric Generating Plants, 2010 edition.

NFPA 909, Code for the Protection of Cultural Resource Properties — Museums, Libraries, and Places of Worship, 2010 2013edition.




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Committee Statement

Committee Statement: This revision updates the NFPA references to the latest editions.

Response Message:


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3.3.5 Ceiling Types.

3.3.5.1 Cloud Ceiling.

Any ceiling system installed in the same plane with horizontal openings to the structure above on all sides. This does notinclude sloped ceilings as defined in 3.3.5.4 .

3.3.5.2 Flat Ceiling.

A continuous ceiling in a single plane.

3.3.5.3 Horizontal Ceiling.

A ceiling with a slope not exceeding 2 in 12.

3.3.5.4 Sloped Ceiling.

A ceiling with a slope exceeding 2 in 12.

3.3.5.5 Smooth Ceiling.

A continuous ceiling free from significant irregularities, lumps, or indentations.




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Committee Statement

CommitteeStatement:

This second draft revision addresses the results of research performed by the Fire Protection Research Foundation andthe Academy of Fire Sprinkler Technology. It refines the concept of cloud ceiling for NFPA 13 as a type of concealed spacethat does not require sprinklers within the concealed space. It more clearly defines small openings in concealed spaces. Itdefines the maximum sizes of small openings through maximum dimensions and overall percentages of open ceiling area.These quantities are based on the testing and research performed by the Fire Protection Research Foundation (FPRF) oncloud ceiling size.

The FPRF looked at sensitivity of sprinklers under various size cloud ceilings with various size gaps in between using firedynamic simulator to model the tests. The accuracy of modeling methods used was validated by fire tests withthermocouples. After several phases of testing it was determined that sprinklers could activate in an acceptable period oftime with an acceptable amount of heat increase above the clouds so long as the clouds were large enough, the spacesbetween them were small enough, and the sprinklers were close enough together. These results can be seen in theproposed language

These tests were done using RTI values associated with QR sprinklers under smooth flat horizontal clouds with maximumheight of 20 feet above the floor. As such these requirements are reflected in the requirements for installation of thesesystems. The requirements for irregular shapes are based on a worst case scenario as no testing was done on nonrectilinear cloud spaces.

The suggested language to Chapter 11 is to compensation for the loss of response time from what would normally beexpected from a QR sprinkler

Additionally, the revised language determines acceptable small openings in terms of real world equipment (such as returnair diffusers) and common ceiling elevations (ie eight feet above the floor). Small openings are a factor in defining thespace above a ceiling as concealed. Areas of openings were compared using a square room having an eight foot highceiling. The room had the permissible gap of one inch per foot of ceiling height between and surrounding four ceilingpanels. In a 20’x20’ room the open area would be 19 percent and be acceptable as a small opening. The same gap in a10’x10’ room would result in a 25% open area and would not be considered acceptable as a small opening.

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Second Revision No. 58-NFPA 13-2014 [ New Section after 3.3.6 ]

3.3.21* Small Openings.

Openings in the ceiling or construction features of a concealed space that allow limited amounts of heat to enter theconcealed space.



13_SR_58_A.3.3.X_edited.docx




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CommitteeStatement:






ResponseMessage:

Public Comment No. 371-NFPA 13-2014 [New Section after 3.3.6]


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A.3.3.6.2 A return air diffuser can be 4 ft by 2 ft (SI units?) and meet the definition of a small opening. A linear diffuser can be longer than 4 ft (SI unit?) but is then limited to 8 in. (SI unit?) in width (or least dimension). Spaces between ceiling panels of architectural features that create a concealed space must meet the same criteria.


3.3.8 Concealed Space.

That portion (s) of a building behind walls, over suspended ceilings, in pipe chases and attics, and whose size might normallyrange from 1 in. (44.45 mm) stud spaces to 8 ft (2.44 m) interstitial truss spaces and that might contain combustible materialssuch as building structural members, thermal and/or electrical insulation, and ducting.




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Committee Statement

CommitteeStatement:

The variations on concealed spaces are seemingly infinite, making it impossible to define a concealed space. Thestandard addresses specific concealed space arrangements that do not require protection on a case by case basis. Thelanguage accepted in the first draft is limited to specific applications and does not capture all possible configurations.Furthermore, the committee was concerned that adding a definition would in fact muddy the waters as opposed toproviding more clarity.

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3.5.13 System Riser.

The aboveground horizontal or vertical pipe between the water supply and the mains (cross or feed) that contains a controlvalve (either directly or within its supply pipe), a pressure gauge, a main drain, and a waterflow alarm device.




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Committee Statement

CommitteeStatement:

This is an editorial change to reaffirm the fact that we are addressing the system main drain as opposed toauxiliary drains or all drains.

Response Message:



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Second Revision No. 21-NFPA 13-2014 [ Section No. 6.2.1.1.1 ]

6.2.1.1.1

Dry sprinklers shall be permitted to be reinstalled where they are not removed by applying torque at the point where thesprinkler is attached to the barrel when removed in accordance with the manufacturer’s installation and maintenanceinstructions .




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Committee Statement

CommitteeStatement:

This language is being revised to correlate with the work done by NFPA 13R and 13D for replacing drysprinklers.

Response Message:

Public Comment No. 136-NFPA 13-2014 [Section No. 6.2.1.1]


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6.3.8 Metallic Pipe and Tube Bending.

6.3.8.1

Bending of Schedule 10 steel pipe, or any steel pipe of wall thickness equal to or greater than Schedule 10 and Types K andL copper tube, shall be permitted when bends are made with no kinks, ripples, distortions, or reductions in diameter or anynoticeable deviations from round.

6.3.8.2

For Schedule 40 and copper tubing, the minimum radius of a bend shall be six pipe diameters for pipe sizes 2 in. (50 mm)and smaller and five pipe diameters for pipe sizes 2 1 ⁄2 in. (65 mm) and larger.

6.3.8.3

For all other steel pipe, the minimum radius of a bend shall be 12 pipe diameters for all sizes.

6.3.8.4

Bending of listed pipe and tubing shall be permitted as allowed by the listing.

6.3.9* Nonmetallic Pipe and Tubing .

Nonmetallic pipe in accordance with Table 6.3.1.1 shall be investigated for suitability in automatic sprinkler installations andlisted for this service.

6.3.9.1

Nonmetallic pipe in accordance with Table 6.3.1.1 shall be investigated for suitability in automatic sprinkler installations andlisted for this service.

6.3.9.1.1

Other types of nonmetallic pipe or tube investigated for suitability in automatic sprinkler installations and listed for this service,including but not limited to CPVC, and differing from that provided in Table 6.3.1.1 shall be permitted where installed inaccordance with their listing limitations.

6.3.9.1.2

Listed nonmetallic pipe shall be installed in accordance with its listing limitations, including installation instructions.

6.3.9.1.3

Manufacturer’s installation instructions shall include its listing limitations.

6.3.9.2

When nonmetallic pipe is used in systems utilizing steel piping internally coated with corrosion inhibitors, the steel pipe coatingshall be listed for compatibility with the nonmetallic pipe materials.

6.3.9.3

When nonmetallic pipe is used in systems utilizing steel pipe that is not internally coated with corrosion inhibitors, no additionalevaluations shall be required.

6.3.9.4*

When nonmetallic pipe is used in systems utilizing steel pipe, cutting oils and lubricants used for fabrication of the steel pipingshall be compatible with the nonmetallic pipe materials in accordance with 6.1.1.6.

6.3.9.5

Fire-stopping materials intended for use on nonmetallic piping penetrations shall be compatible with the nonmetallic pipematerials in accordance with 6.1.1.6.

6.3.9.6

Nonmetallic pipe listed for light hazard occupancies shall be permitted to be installed in ordinary hazard rooms of otherwise

light hazard occupancies where the room does not exceed 400 ft2 (37 m2).

6.3.9.6.1

Nonmetallic pipe installed in accordance with 6.3.9.6 shall be permitted to be installed exposed, in accordance with thelisting.

6.3.9.7

Nonmetallic pipe shall not be listed for portions of an occupancy classification.

6.3.9.8

Bending of listed nonmetallic pipe or tubing shall be permitted as allowed by the listing.

6.3.7.2

Listed nonmetallic pipe shall be installed in accordance with its listing limitations, including installation instructions.

6.3.7.2.1

Manufacturer's installation instructions shall include its listing limitations.

6.3.7.4

When nonmetallic pipe is used in systems utilizing steel pipe that is not internally coated with corrosion inhibitors, noadditional evaluations shall be required.

6.3.7.5

When nonmetallic pipe is used in systems utilizing steel pipe, cutting oils and lubricants used for fabrication of the steel pipingshall be compatible with the nonmetallic pipe materials in accordance with 6.1.1.6 .


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6.3.7.6

Fire-stopping materials intended for use on nonmetallic piping penetrations shall be compatible with the nonmetallic pipematerials in accordance with 6.1.1.6 .

6.3.7.7

Nonmetallic pipe listed for light hazard occupancies shall be permitted to be installed in ordinary hazard rooms of otherwise

light hazard occupancies where the room does not exceed 400 ft 2 (37 m 2 ).

6.3.7.8

Nonmetallic pipe shall not be listed for portions of an occupancy classification.

6.3.7.9 Listed Pipe and Tubing.

6.3.7.9.1

Other types of pipe or tube investigated for suitability in automatic sprinkler installations and listed for this service, includingbut not limited to CPVC and steel, and differing from that provided in Table 6.3.1.1 shall be permitted where installed inaccordance with their listing limitations, including installation instructions.

6.3.7.9.2

Pipe or tube listed for light hazard occupancies shall be permitted to be installed in ordinary hazard rooms of otherwise light

hazard occupancies where the room does not exceed 400 ft 2 (37 m 2 ).

6.3.7.9.2.1

Pipe or tube installed in accordance with 6.3.7.8.2 shall be permitted to be installed exposed, in accordance with the listing.

6.3.7.9.3

Pipe or tube shall not be listed for portions of an occupancy classification.

6.3.7.9.4


6.3.7.10 Pipe and Tube Bending.

6.3.7.10.1

Bending of Schedule 10 steel pipe, or any steel pipe of wall thickness equal to or greater than Schedule 10 and Types K andL copper tube, shall be permitted when bends are made with no kinks, ripples, distortions, or reductions in diameter or anynoticeable deviations from round.

6.3.7.10.2

For Schedule 40 and copper tubing, the minimum radius of a bend shall be six pipe diameters for pipe sizes 2 in. (50 mm)and smaller and five pipe diameters for pipe sizes 2 1 ⁄2 in. (65 mm) and larger.

6.3.7.10.3

For all other steel pipe, the minimum radius of a bend shall be 12 pipe diameters for all sizes.

6.3.7.10.4


6.3.7.11 Pipe and Tube Identification.

6.3.7.11.1

All pipe, including specially listed pipe allowed by 6.3.7.8 , shall be marked along its length by the manufacturer in such away as to properly identify the type of pipe.

6.3.7.11.2

The marking shall be visible on every piece of pipe over 2 ft (610 mm) long.

6.3.7.11.3

Pipe identification shall include the manufacturer's name, model designation, or schedule.

6.3.10* Listed Metallic Pipe and Tubing.

6.3.10.1

Other types of pipe or tube investigated for suitability in automatic sprinkler installations and listed for this service, includingsteel, and differing from that provided in Table 6.3.1.1 shall be permitted where installed in accordance with their listinglimitations, including installation instructions.

6.3.10.2

Pipe or tube listed only for light hazard occupancies shall be permitted to be installed in ordinary hazard rooms of otherwise

light hazard occupancies where the room does not exceed 400 ft2 (37 m2).

6.3.10.2.1

Pipe or tube installed in accordance with 6.3.10.2 shall be permitted to be installed exposed, in accordance with the listing.

6.3.10.3

Pipe or tube shall not be listed for portions of an occupancy classification.

6.3.10.4


6.3.11 Pipe and Tube Identification.

6.3.11.1*

All pipe, including specially listed pipe allowed by 6.3.7.8, shall be marked along its length by the manufacturer in such a wayas to properly identify the type of pipe.

6.3.11.2

The marking shall be visible on every piece of pipe over 2 ft (600 mm) long.


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6.3.11.3

Pipe identification shall include the manufacturer's name, model designation, or schedule.



13_SR_157_6.3.7_edited.docx





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Committee Statement

CommitteeStatement:

As currently worded, the nonmetallic pipe section includes language addressing metallic pipe. This reorganization isintended to move any requirements associated with metallic pipe out of the nonmetallic pipe section.

ResponseMessage:



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6.3.7* Nonmetallic Pipe and Tubing . 6.3.7.1 Nonmetallic pipe in accordance with Table 6.3.1.1 shall be investigated for suitability in automatic sprinkler installations and listed for this service. 6.3.7.1.1 Other types of nonmetallic pipe or tube investigated for suitability in automatic sprinkler installations and listed for this service, including but not limited to CPVC,, and differing from that provided in Table 6.3.1.1 shall be permitted where installed in accordance with their listing limitations. 6.3.7.1.2 Listed nonmetallic pipe shall be installed in accordance with its listing limitations, including installation instructions. 6.3.7.1.1 3 Manufacturer's installation instructions shall include its listing limitations. 6.3.7.2 When nonmetallic pipe is used in systems utilizing steel piping internally coated with corrosion inhibitors, the steel pipe coating shall be listed for compatibility with the nonmetallic pipe materials. 6.3.7.3 When nonmetallic pipe is used in systems utilizing steel pipe that is not internally coated with corrosion inhibitors, no additional evaluations shall be required. 6.3.7.4* When nonmetallic pipe is used in systems utilizing steel pipe, cutting oils and lubricants used for fabrication of

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the steel piping shall be compatible with the nonmetallic pipe materials in accordance with 6.1.1.6. 6.3.7.5 Fire-stopping materials intended for use on nonmetallic piping penetrations shall be compatible with the nonmetallic pipe materials in accordance with 6.1.1.6. 6.3.7.6 Nonmetallic pipe listed for light hazard occupancies shall be permitted to be installed in ordinary hazard rooms of otherwise light hazard occupancies where the room does not exceed 400 ft2 (37 m2). 6.3.7.6.1 Nonmetallic pipe installed in accordance with 6.3.7.6 shall be permitted to be installed exposed, in accordance with the listing. 6.3.7.7 Nonmetallic pipe shall not be listed for portions of an occupancy classification. 6.3.7.8 Bending of listed nonmetallic pipe or tubing shall be permitted as allowed by the listing. 6.3.7.8* Listed Metallic Pipe and Tubing. 6.3.7.8.1 Other types of pipe or tube investigated for suitability in automatic sprinkler installations and listed for this service, including but not limited to CPVC and steel, and differing from that provided in Table 6.3.1.1 shall be permitted where installed in accordance with their listing limitations, including installation instructions.

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6.3. 7.8.2 Pipe or tube listed only for light hazard occupancies shall be permitted to be installed in ordinary hazard rooms of otherwise light hazard occupancies where the room does not exceed 400 ft2 (37 m2). 6.3. 7.8.2.1 Pipe or tube installed in accordance with 6.3. 7.8.2 shall be permitted to be installed exposed, in accordance with the listing. 6.3. 7.8.3 Pipe or tube shall not be listed for portions of an occupancy classification. 6.3. 7.8.4 Bending of listed pipe and tubing shall be permitted as allowed by the listing. 6.3.7.9 Pipe and Tube Bending. 6.3.7.9.1 Bending of Schedule 10 steel pipe, or any steel pipe of wall thickness equal to or greater than Schedule 10 and Types K and L copper tube, shall be permitted when bends are made with no kinks, ripples, distortions, or reductions in diameter or any noticeable deviations from round. 6.3.7.9.2 For Schedule 40 and copper tubing, the minimum radius of a bend shall be six pipe diameters for pipe sizes 2 in. (50 mm) and smaller and five pipe diameters for pipe sizes 21⁄2 in. (65 mm) and larger.

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6.3.7.9.3 For all other steel pipe, the minimum radius of a bend shall be 12 pipe diameters for all sizes. 6.3.7.9.4 Bending of listed pipe and tubing shall be permitted as allowed by the listing. 6.3. 7.10 Pipe and Tube Identification. 6.3. 7.10.1* All pipe, including specially listed pipe allowed by 6.3.7.8, shall be marked along its length by the manufacturer in such a way as to properly identify the type of pipe. 6.3. 7.10.2 The marking shall be visible on every piece of pipe over 2 ft (610 mm) long. 6.3. 7.10.3 Pipe identification shall include the manufacturer's name, model designation, or schedule.

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A.6.3.7 CPVC is a plastic material, and consideration is necessary when other materials or chemicals come in contact with CPVC that can cause degradation of performance of the pipe due to interaction of materials. Compliance with 6.3.6 combined with following manufacturer’s guidance on installation and compatible materials will help prevent premature performance degradation of CPVC piping. Excessive mechanical stress caused by hanging methods or excessive bending on CPVC piping beyond the recommended limitations can cause stress failure over time and should be avoided. Other types of pipe and tube that have been investigated and listed for sprinkler applications include thermoplastic pipe and fittings. While these products can offer advantages, such as ease of handling and installation, cost-effectiveness, reduction of friction losses, and improved corrosion resistance, it is important to recognize that they also have limitations that are to be considered by those contemplating their use or acceptance. With respect to thermoplastic pipe and fittings, exposure of such piping to elevated temperatures in excess of that for which it has been listed can result in distortion or failure. Accordingly, care must be exercised when locating such systems to ensure that the ambient temperature, including seasonal variations, does not exceed the rated value. The upper service temperature limit of currently listed CPVC sprinkler pipe is 150°F (65.5°C) at 175 psi (12.1 bar).

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Not all pipe or tube made to ASTM F442, Standard Specification for Chlorinated Poly (Vinyl Chloride) (CPVC) Plastic Pipe (SDR-PR), is listed for fire sprinkler service. Listed pipe is identified by the logo of the listing agency. Not all fittings made to ASTM F437, Standard Specification for Threaded Chlorinated Poly (Vinyl Chloride) (CPVC) Plastic Pipe Fittings, Schedule 80, ASTM F438, Standard Specification for Socket-Type Chlorinated Poly (Vinyl Chloride) (CPVC) Plastic Pipe Fittings, Schedule 40, and ASTM F439, Standard Specification for Socket-Type Chlorinated Poly (Vinyl Chloride) (CPVC) Plastic Pipe Fittings, Schedule 80, as described in 6.4.4, are listed for fire sprinkler service. Listed fittings are identified by the logo of the listing agency. Consideration must also be given to the possibility of exposure of the piping to elevated temperatures during a fire. The survival of thermoplastic piping under fire conditions is primarily due to the cooling effect of the discharge from the sprinklers it serves. As this discharge might not occur simultaneously with the rise in ambient temperature and, under some circumstances, can be delayed for periods beyond the tolerance of the piping, protection in the form of a fire-resistant membrane is generally required. (Some listings do provide for the use of exposed piping in conjunction with residential or quick-response sprinklers, but only under specific, limited installation criteria.)

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Where protection is required, it is described in the listing information for each individual product, and the requirements given must be followed. It is equally important that such protection must be maintained. Removal of, for example, one or more panels in a lay-in ceiling can expose piping in the concealed space to the possibility of failure in the event of a fire. Similarly, the relocation of openings through protective ceilings that expose the pipe to heat, inconsistent with the listing, would place the system in jeopardy. The potential for loss of the protective membrane under earthquake conditions should also be considered. While the listings of thermoplastic piping do not prohibit its installation in combustible concealed spaces where the provision of sprinkler protection is not required, and while the statistical record of fire originating in such spaces is low, it should be recognized that the occurrence of a fire in such a space could result in failure of the piping system. The investigation of pipe and tube other than described in Table 6.3.1.1 should involve consideration of many factors, including the following: (1) Pressure rating (2) Beam strength (hangers) (3) Unsupported vertical stability (4) Movement during sprinkler operation (affecting water distribution) (5) Corrosion (internal and external), chemical and electrolytic

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(6) Resistance to failure when exposed to elevated temperatures (7) Methods of joining (strength, permanence, fire hazard) (8) Physical characteristics related to integrity during earthquakes A.6.3.7.8 Other types of pipe and tube that have been investigated and listed for sprinkler applications include lightweight steel pipe and thermoplastic pipe and fittings. While these products can offer advantages, such as ease of handling and installation, cost effectiveness, and reduction of friction losses, and improved corrosion resistance, it is important to recognize that they also have limitations that are to be considered by those contemplating their use or acceptance. Corrosion studies have shown that, in comparison to Schedule 40 pipe, the effective life of lightweight steel pipe can be reduced, the level of reduction being related to its wall thickness. Further information with respect to corrosion resistance is contained in the individual listings for such pipe. With respect to thermoplastic pipe and fittings, exposure of such piping to elevated temperatures in excess of that for which it has been listed can result in distortion or failure. Accordingly, care must be exercised when locating such systems to ensure that the ambient temperature, including seasonal variations, does not exceed the rated value.

5

The upper service temperature limit of currently listed CPVC sprinkler pipe is 150°F (65.5°C) at 175 psi (12.1 bar). Not all pipe or tube made to ASTM F 442, Standard Specification for Chlorinated Poly (Vinyl Chloride) (CPVC) Plastic Pipe (SDR-PR), is listed for fire sprinkler service. Listed pipe is identified by the logo of the listing agency. Not all fittings made to ASTM F 437, Standard Specification for Threaded Chlorinated Poly (Vinyl Chloride) (CPVC) Plastic Pipe Fittings, Schedule 80; ASTM F 438, Standard Specification for Socket-Type Chlorinated Poly (Vinyl Chloride) (CPVC) Plastic Pipe Fittings, Schedule 40; and ASTM F 439, Standard Specification for Socket-Type Chlorinated Poly (Vinyl Chloride) (CPVC) Plastic Pipe Fittings, Schedule 80, as described in 6.4.4, are listed for fire sprinkler service. Listed fittings are identified by the logo of the listing agency. Consideration must also be given to the possibility of exposure of the piping to elevated temperatures during a fire. The survival of thermoplastic piping under fire conditions is primarily due to the cooling effect of the discharge from the sprinklers it serves. As this discharge might not occur simultaneously with the rise in ambient temperature and, under some circumstances, can be delayed for periods beyond the tolerance of the piping, protection in the form of a fire-resistant membrane is generally required. (Some listings do provide for the use of

6

exposed piping in conjunction with residential or quick-response sprinklers, but only under specific, limited installation criteria.) Where protection is required, it is described in the listing information for each individual product, and the requirements given must be followed. It is equally important that such protection must be maintained. Removal of, for example, one or more panels in a lay-in ceiling can expose piping in the concealed space to the possibility of failure in the event of a fire. Similarly, the relocation of openings through protective ceilings that expose the pipe to heat, inconsistent with the listing, would place the system in jeopardy. The potential for loss of the protective membrane under earthquake conditions should also be considered. While the listings of thermoplastic piping do not prohibit its installation in combustible concealed spaces where the provision of sprinkler protection is not required, and while the statistical record of fire originating in such spaces is low, it should be recognized that the occurrence of a fire in such a space could result in failure of the piping system. The investigation of pipe and tube other than described in Table 6.3.1.1 should involve consideration of many factors, including the following: (1) Pressure rating (2) Beam strength (hangers) (3) Unsupported vertical stability

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(4) Movement during sprinkler operation (affecting water distribution) (5) Corrosion (internal and external), chemical and electrolytic (6) Resistance to failure when exposed to elevated temperatures (7) Methods of joining (strength, permanence, fire hazard) (8) Physical characteristics related to integrity during earthquakes


6.4.1*

Fittings used in sprinkler systems shall meet or exceed the standards in Table 6.4.1 or be in accordance with 6.4.2 or 6.4.4.

Table 6.4.1 Fittings Materials and Dimensions

Materials and Dimensions Standard

Cast Iron

Cast Iron Threaded Fittings, Class 125 and 250 ASME B16.4

Cast Iron Pipe Flanges and Flanged Fittings ASME B16.1

Malleable Iron

Malleable Iron Threaded Fittings, Class 150 and 300 ASME B16.3

Steel

Factory-Made Wrought Steel Buttweld Fittings ASME B16.9

Buttwelding Ends for Pipe, Valves, Flanges, and Fittings ASME B16.25

Specification for Piping Fittings of Wrought Carbon Steel and Alloy Steel for Moderate and ElevatedTemperatures

ASTM A234

Steel Pipe Flanges and Flanged Fittings ASME B16.5

Forged Steel Fittings, Socket Welded and Threaded ASME B16.11

Copper

Wrought Copper and Copper Alloy Solder Joint Pressure Fittings ASME B16.22

Cast Copper Alloy Solder Joint Pressure Fittings ASME B16.18

CPVC

Chlorinated Polyvinyl Chloride (CPVC) Specification for Schedule 80 CPVC Threaded Fittings ASTM F437

Specification for Schedule 40 CPVC Socket Type Fittings ASTM F438

Specification for Schedule 80 CPVC Socket Type Fittings ASTM F439

Bronze Fittings

Cast Bronze Threaded Fittings Copper Alloy Threaded Fittings Classes 125 and 250 ASTM B16.15

Stainless Steel

Specification for Wrought Austenitic Stainless Steel Pipe FittingsASTMA403/A403M







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Committee Statement

CommitteeStatement:

Certain brass alloys have been known to corrodes from dezincification—a phenomenon where zinc is dissolved out ofbrass. This is more common in stagnant water systems connected to a copper piping network. Dezincification cancause leakage or failures in the fitting.

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A.6.4.1 Consideration of compatibility should be provided when connecting dissimilar materials.


6.4.8 Extension Fitting.

6.4.8.1

The outlet diameter of the extension fitting shall be equal to the inlet diameter of the sprinkler. Extension fittings shall bepermitted to be used with sprinklers K-8.0 or smaller.

6.4.8.2

Extension fittings shall be permitted to be used with sprinklers in light hazard and ordinary hazard occupancies only.

6.4.8.3

The internal diameter of extension fittings shall have the same nominal inlet diameter of the attached sprinkler.

6.4.8.4

A single extension fitting up to a maximum of 2 in. (50 mm) in length shall be permitted to be installed with a sprinkler.

6.4.8.4.1

The extension fitting shall be included in the hydraulic calculations. Extension fittings longer than 2 in. (50 mm) shall not bepermitted unless specifically listed.

6.4.8.4.2

The requirement of shall not apply where the sprinkler is listed for use with the extension nipple.

6.4.8.5

Extension fittings shall be included in the hydraulic calculations.

6.4.8.5.1

Extension fittings 2 in. (50 mm) and less shall not be required to be included in the hydraulic calculations.




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Committee Statement

CommitteeStatement:

Testing has been performed on sprinkler extensions and it has been proven that up to 2" extensions do not impact the KFactor of the attached sprinkler beyond the ranges found in Table 6.2.3.1. Greater than 2" in length should be listed andincluded in the hydraulic calculations. NFPA 13 23.4.4.7.1 (9) allows the friction loss for the fitting directly connected to asprinkler to be excluded from the hydraulic calculation. The fitting (tee, 90 or deducing coupling) that the extension fittingspiece is attached should be included. If an extension fitting is added after hydraulic calculations have been performed,calculations should be redone adding in the friction loss at each tee, 90, or reducing coupling that was originally omitted.

ResponseMessage:




Public Comment No. 137-NFPA 13-2014 [Sections 6.4.8.2.1, 6.4.8.2.2]


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7.1.5 Air Venting.

A single, air vent with a connection conforming to 8.16.6 shall be provided on each wet pipe system utilizing black orgalvanized steel pipe as a means for venting. metallic pipe. (See A.8.16.6 .)

7.1.5.1

Venting from multiple points on each system shall not be required.




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Committee Statement

CommitteeStatement:

Revised for clarity – as it has currently been proposed, the term “air vent with a connection” does not describe the intentsufficiently. The reference to 8.16.6 was added to add clarity as to the design guidance for venting installations. Thereference to A.8.16.4.2.2 was added to direct the users of the standard to the place in the Annex where the purpose ofthe air vent is explained.

ResponseMessage:






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Second Revision No. 27-NFPA 13-2014 [ Section No. 7.2.6.6.3.1 ]

7.2.6.6.3.1

Each dry pipe system shall have an air a dedicated air maintenance device.




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Committee Statement

Committee Statement: Changed the language to further clarify that each dry pipe valve/system needs to have its own dedicated AMD.

Response Message:

Public Comment No. 119-NFPA 13-2014 [Section No. 7.2.6.6.3.1]


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Second Revision No. 28-NFPA 13-2014 [ Section No. 7.6.3.4 ]

Global SR-56

7.6.3.4

A listed 1 ⁄2 in. ( 12 13 mm) relief valve shall be permitted in lieu of the expansion chamber required in 7.6.3.3 , and asillustrated in Figure 7.6.3.4 , provided the antifreeze system volume does not exceed 40 gal ( 151150 L).

Figure 7.6.3.4 Arrangement of Supply Piping with Relief Valve and Backflow Device.




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Committee Statement

CommitteeStatement:

The additional indicating control valve is not needed for this antifreeze loop configuration. In Figure 7.6.3.3 the controlvalve is needed to avoid the mixing of water and antifreeze solution during a forward flow test, because the piping isbasically all on the same plane. In Figure 7.6.3.4 however, the loop separates the (lighter) water from the (heavier)antifreeze solution, so the backflow preventer and the test valve do not need to be isolated from the downstream piping.Also, the additional flow test valve is not needed. The antifreeze loop has a test valve “A” at the water/antifreeze interfacethat can be sized and utilized for the purpose.

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8.2.4.1*

Multistory buildings exceeding two stories in height shall be provided with a floor control valve, check valve, main drain valve,and flow switch for isolation, control, and annunciation of water flow on for each individual floor level.




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Committee Statement

CommitteeStatement:

This proposed change of "on each floor level" to "for each floor level" would allow the required floor control valveassemblies to be located on a level remote from the level being served. It is, at times, more practical to locate all sprinklerequipment in a central location such as a riser room or another area remote from the floor being served. This revision willnot change the requirement that all floors in multistory building be equipped with a floor control valve but facilitate ease ofinstallation and of inspection, test and maintenance of the systems.

ResponseMessage:



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Second Revision No. 30-NFPA 13-2014 [ New Section after 8.2.4.3 ]

8.2.4.4

The requirements of 8.2.4 shall not apply to dry systems in parking garages.




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Committee Statement

CommitteeStatement:

The requirements for floor control valve assemblies on each floor of a multi-level structure were intended for wet systemsonly but as the new language does not limit them to wet pipe systems only, they need to be applied to all systems, bothwet and dry. This new section requires a floor control assembly (control valve, check valve, and drain) and a flow switch ateach level (with an exception for certain small buildings ). This will make it difficult to protect unheated parking garageswith a single dry-pipe valve and then separate control and check valves downstream.

Section 7.2.3.9 of NFPA 13 prohibits the use of check valves from being used to subdivide a dry-pipe system unless thecheck valves are in a heated enclosure. This would make it difficult for a single dry-pipe valve to serve a system arrangedin accordance with 8.16.1.5. It would also be difficult to meet the requirement of 8.2.4 (8.16.1.5 in 2013 edition) for a flowswitch on each level if you only had one dry-pipe valve. Paddle-type flow switches are not allowed on dry-pipe systemsand It is unclear if a pressure switch can be used on a pipe that is not a part of the trim on a dry-pipe valve.

Section 8.2.4.3 (8.16.1.5.3 in the 2013 edition of NFPA 13) does provide an exception that lets you ignore the rulesregarding the separate floor control assemblies and flow switches on each floor if the whole parking garage is less than52,000 sq ft (assuming an ordinary hazard design). With six stories, you would have to average 8,667 sq ft per floor, whichis only enough space to park about 30 cars, so that’s a pretty small parking garage.

As stated, I believe these requirements were not intended to be applied to dry systems and language needs to be added tothe standard to specifically exempt them from the floor control valve requirements of section 8.2.4.

ResponseMessage:

Public Comment No. 226-NFPA 13-2014 [New Section after 8.2.4.3]


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Second Revision No. 31-NFPA 13-2014 [ Sections 8.4.6.1.1, 8.4.6.1.2 ]

8.4.6.1.1

ESFR sprinklers shall not be permitted to protect storage on solid shelf racks unless the solid shelves are protected inaccordance with 16.1.6 or 17.1.5 as applicable to the type of storage.

8.4.6.1.2

ESFR sprinklers shall not be permitted to protect storage with open top containers.




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Committee Statement

CommitteeStatement:

This section does not belong in Chapter 8. This is a storage issue and should be addressed in the storage chapters.This revision is being made to correlate with the rejection of PC 81 for CMSA sprinklers.

ResponseMessage:


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Second Revision No. 32-NFPA 13-2014 [ New Section after 8.5.5.3.1.2 ]

8.5.5.3.1.3

The deflector of automatic sprinklers installed under fixed obstructions shall be positioned no more than 12 in. (300 mm)below the bottom of the obstruction.




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Committee Statement

CommitteeStatement:

The new text of 8.6.5.3.6 was added to clarify the proper location for sprinklers below obstructions such as wide ductsand open grate flooring. The same text is being added into Section 8.5.5.3.1, which deals with the same types ofissues.

ResponseMessage:

Public Comment No. 140-NFPA 13-2014 [New Section after 8.5.5.3.1.2]


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8.5.5.3.3.1

Quick-response spray Spray sprinklers shall be permitted to be utilized under overhead doors.




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Committee Statement

Committee Statement: There are situations wherestandard response sprinklers should be permited beneath overhead doors.

Response Message:



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8.5.7.1.1

A When a sprinkler is installed directly beneath a skylight not exceeding 32 ft2 (3 3.0 m2) shall measure , the distance to theceiling shall be measured to the plane of the ceiling and not to the top of as if the skylight was not present .




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Committee Statement

CommitteeStatement:

The concept of PC 343 was used as the basis for this revision, however the verbiage was modified for clarity. The planeof the ceiling will be interpreted as the lower ceiling elevation under the skylight, which will stop people from being able toactually put the sprinkler up into the skylight. This interpretation would be incorrect, therefore the language is beingrevised to eliminate that potential interpretation. The section is being relocated to maintain the requirement for the 10 ftseparation between skylights in 8.5.7.2.

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Second Revision No. 55-NFPA 13-2014 [ Section No. 8.6.4.1.4 [Excluding any Sub-Sections] ]

Sprinklers under a roof or ceiling in combustible concealed spaces of wood joist or wood truss construction with members lessthan 3 ft (0.91 m) on center with a slope having a pitch of 4 in 12 or greater shall be positioned in accordance with Figure8.6.4.1.4 and the requirements of 8.6.4.1.4.1 through 8.6.4.1.4.6.

Figure 8.6.4.1.4 Sprinklers Under Roof or Ceiling in Combustible Concealed Spaces of Wood Joist or Wood TrussConstruction with Members Less Than 3 ft (0.91 m) on Center and with a Slope Having a Pitch of 4 in 12 or Greater.




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Committee Statement

Committee Statement: The arrangement governed by this section was added to the charging requirement for clarity.

Response Message:


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8.6.4.1.4.3*

Sprinklers shall be installed so that the sprinklers installed along the eave are located not less than 5 ft (1.52 1.5 m) from theintersection of the upper and lower truss chords or the wood rafters and ceiling joists.



2in_rule_SR.png Annex Figure

13_SR_161_A.8.6.4.1.4.3_edited.docx




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Submittal Date: Wed Aug 13 12:00:09 EDT 2014

Committee Statement

CommitteeStatement:

The original submitter seeks to reduce the requirements on the sprinklers at the eaves, which would otherwise requirethree closely spaced branchlines to provide protection for a small attic. Clarification that sprinkler spacing and positioningcan be made to non-combustible insulation could effectively reduce the width to the point where a single sprinkler at theridge provides adequate protection.

ResponseMessage:

Public Comment No. 14-NFPA 13-2014 [New Section after 8.6.4.1.4.3]


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A.8.6.4.1.4.3 Attic width and sprinkler spacing should be measured from the point of intersection between the bottom of the top cord of the roof joist or truss and the top of the ceiling joist or noncombustible insulation. (See Figure A.8.6.4.1.4.3.)


8.6.4.1.4.5*

The requirements of 8.6.4.1.4.3 or 8.6.4.1.4.4 shall not apply to sprinklers installed at the corner of the eave of a hip type roofwhere located directly under the hip line spaced in accordance with 8.6.3.2.3 or located along the eave spaced on the slopeplane not less than 5 ft (1.52 1.5 m) from the intersection of the upper and lower truss chords or the wood rafters and ceilingjoists.



SR_36_Figure.png

13_SR_36_A.8.6.4.1.4.5_edited.docx




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Committee Statement

CommitteeStatement:

Sprinkler protection at the eave continues to be problematic. There are currently two schools of thought: space to theeave (as if it were a wall and baffle between sprinklers) or position under the eave and protect opposing panes (inapparent violation of 8.6.4.2.1).

From a fire protection standpoint, locating sprinklers on the eave protecting two planes, while aligning the sprinklerdeflector with the pitch of the eave is the better option. The real question then, is just how far off the eave should weposition our first sprinkler. In this case 8.6.3.2.3 can provide us with a lot of flexibility and give the designer additionalflexibility while providing better fire protection.

ResponseMessage:



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A.8.6.4.1.4.5* See Figure A.8.6.4.1.4.5.

Figure A.8.6.4.1.4.5 Hip Roof Installations.


8.6.4.2.1

Unless the requirements of 8.6.4.2.2 or 8.6.4.2.3 are met, deflectors of sprinklers shall be aligned parallel to ceilings, roofs,hips, or the incline of stairs.




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Committee Statement

Committee Statement: This change clarifies that spray sprinklers are permissible under the hip, not just the slope plane.

Response Message:



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8.6.5.2.1.3* Minimum Distance from Obstructions.

Unless the requirements of 8.6.5.2.1.4 through 8.6.5.2.1.9 are met, sprinklers shall be positioned away from obstructions aminimum distance of three times the maximum dimension of the obstruction (e.g., structural members, pipe, columns, andfixtures) in accordance with Figure 8.6.5.2.1.3(a) and Figure 8.6.5.2.1.3(b) .

Figure 8.6.5.2.1.3(a) Minimum Distance from Obstruction (SSU).

Figure 8.6.5.2.1.3(b) Minimum Distance from Obstruction (SSP).


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(A)

The maximum clear distance required shall be 24 in. (609 600 mm) in accordance with Figure 8.6.5.2.1.3(B) .

Figure 8.6.5.2.1.3(A) Minimum Distance from Obstruction (SSU/SSP).

(B)

The maximum clear distance shall not be applied to obstructions in the vertical orientation (e.g., columns).



Figure_8.5.2.1.3_a_.JPG

Figure_8.6.5.2.1.3_b_.JPG




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CommitteeStatement:

Recent fire testing has shown that there is an issue with the maximum clear distance of 24 inch allowed by the "threetimes rule". This testing has shown that when this maximum clear distance allowance is used to located sprinklers fromlarge obstructions, the fire may not be controlled. As this testing was limited to vertical columns and based upon theconcerns of the committee, this public comment is limited to obstructions in the vertical orientation. (test report wassubmitted at First Draft meeting)

This proposed change does not change the base three times rule or four times rule but will remove the maximum cleardistance to obstructions in the vertical orientation such as columns. This proposed change would only become applicablewhen applying this rule to large vertical obstructions in excess of 8 inches (or 9 inches for the four times rule). The threetimes or four times rule may be applied to these large columns without the utilizing the maximum clear distance allowance.For example, for a ten inch column, the sprinkler would need to be located a minimum distance of 30 inches from thecolumn when applying the three times rule or 40 inches for the four times rule. Note that a new figure was added to replaceexisting figure.

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8.7.5.2.1.3*


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Unless the requirements of 8.7.5.2.1.4 or 8.7.5.2.1.5 are met, sprinklers shall be positioned away from obstructions a minimumdistance of three times the maximum dimension of the obstruction (e.g., truss webs and chords, pipe, columns, and fixtures).The maximum clear distance required shall be 24 in. (610 mm) and shall be positioned in accordance with Figure 8.7.5.2.1.3where obstructions are present in accordance with Figure 8.7.5.2.1.3(a) and Figure 8.7.5.2.1.3(b) .

Figure 8.7.5.2.1.3(a) Minimum Distance from Obstruction (Standard Sidewall Spray Sprinkler). Minimum Distancefrom Obstruction (Standard Sidewall Spray Sprinkler) Plan of View Column.

Figure 8.7.5.2.1.3(b) Minimum Distance from Obstruction (Standard Sidewall Spray Sprinkler).


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(A)

The maximum clear distance required to obstructions in the horizontal orientation (e.g., light fixtures and truss chords) shallbe 24 in. (600 mm).

(B)




Figure_8.7.5.2.1.3_a_.JPG





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8.8.5.2.1.3*


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Unless the requirements of 8.8.5.2.1.4 through 8.8.5.2.1.8 are met, sprinklers shall be positioned away from obstructions aminimum distance of four times the maximum dimension of the obstruction (e.g., truss webs and chords, pipe, columns, andfixtures). The maximum clear distance required shall be 36 in. (914 mm) in accordance with Figure 8.8.5.2.1.3 in accordancewith Figure 8.8.5.2.1.3(a) and Figure 8.8.5.2.1.3(b) .

Figure 8.8.5.2.1.3(a) Minimum Distance from Obstruction (Extended Coverage Upright and Pendent SpraySprinklers). Minimum Distance from an Obstruction in a Vertical Orientation (Extended Coverage Upright andPendent Spray Sprinkler).

Figure 8.8.5.2.1.3(b) Minimum Distance from an Obstruction in a Horizontal Orientation (Extended Coverage Uprightand Pendent Spray Sprinkler).


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(A)

The maximum clear distance required to obstructions in the horizontal orientation (e.g., light fixtures and truss chords) shallbe 36 in. (914 mm).

(B)




Figure_8.8.5.2.1.3_a_.JPG





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This proposed change does not change the base three times rule or four times rule but will remove the maximum cleardistance to obstructions in the vertical orientation such as columns. This proposed change would only become applicablewhen applying this rule to large vertical obstructions in excess of 8 inches (or 9 inches for the four times rule). The threetimes or four times rule may be applied to these large columns without the utilizing the maximum clear distance allowance.For example, for a ten inch column, the sprinkler would need to be located a minimum distance of 30 inches from thecolumn when applying the three times rule or 40 inches for the four times rule. Note that a new figure was added to replace


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existing figure.

ResponseMessage:



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8.9.5.2.1.3*


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Unless the requirements of 8.9.5.2.1.4 through 8.9.5.2.1.5 are met, sprinklers shall be positioned away from obstructions aminimum distance of four times the maximum dimension of the obstruction (e.g., truss webs and chords, pipe, columns, andfixtures) in accordance with Figure 8.9.5.2.1.3 Figure 8.9.5.2.1.3(a) and Figure 8.9.5.2.1.3(b) .

Figure 8.9.5.2.1.3(a) Minimum Distance from Obstruction (Extended Coverage Sidewall) Minimum Distance from anObstruction in the Vertical Orientation (Extended Coverage Sidewall) .

Figure 8.9.5.2.1.3(b) Minimum Distance from an Obstruction in the Horizontal Orientation (Extended CoverageSidewall).


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(A)

The maximum clear distance required to obstructions in the horizontal orientation (e.g., light fixtures and truss chords), shallbe 36 in. (914 mm).

(B)




Figure_8.9.5.2.1.3_a_Minimum_Distance_from_Obstruction_Extended_Coverage_Sidewall_.JPG

Figure_8.9.5.2.1.3_b_Minimum_Distance_from_Obstruction_Extended_Coverage_Sidewall_.JPG




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8.10.6.2.1.3*

Unless the requirements of 8.10.6.2.1.4 through 8.10.6.2.1.8 are met, sprinklers shall be positioned away from obstructions aminimum distance of four times the maximum dimension of the obstruction (e.g., truss webs and chords, pipe, columns, andfixtures). The maximum clear distance required shall be 36 in. (914 mm) in accordance with Figure 8.10.6.2.1.3 inaccordance with Figure 8.10.6.2.1.3(a) and Figure 8.10.6.2.1.3(b) .

Figure 8.10.6.2.1.3(a) Minimum Distance from an Obstruction in the Vertical Orientation (Residential Upright andPendent Spray Sprinkler).

Figure 8.10.6.2.1.3(b) Minimum Distance from an Obstruction in the Horizontal Orientation (Residential Upright andPendent Spray Sprinkler).

(A)

The maximum clear distance required to obstructions in the horizontal orientation (e.g., light fixture and truss chords) shall be36 in. (914 mm).

(B)




Figure_8.10.6.2.1.3_a_.JPG


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Figure_8.10.6.2.1.3_b_.JPG




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This proposed change does not change the base three times rule (or four times rule) but will remove the maximum cleardistance to obstructions in the vertical orientation such as columns. This proposed change would only become applicablewhen applying this rule to large vertical obstructions in excess of 8 inches (or 9 inches for the four times rule). The threetimes or four times rule may be applied to these large columns without the utilizing the maximum clear distance allowance.For example, for a ten inch column, the sprinkler would need to be located a minimum distance of 30 inches from thecolumn when applying the three times rule or 40 inches for the four times rule. Note that a new figure was added to replaceexisting figure.

ResponseMessage:



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Second Revision No. 43-NFPA 13-2014 [ Sections 8.10.7.2.1.3, 8.10.7.2.1.4 ]

8.10.7.2.1.3*

Unless the requirements of 8.10.7.2.1.4 through 8.10.7.2.1.7 are met, sprinklers shall be positioned away from obstructions aminimum distance of four times the maximum dimension of the obstruction (e.g., truss webs and chords, pipe, columns, andfixtures) .

(A)

The maximum clear distance required from obstructions in the horizontal orientation (e.g., light fixtures and truss chords) shallbe 36 in. (914 609 mm) from the sprinkler (e.g., truss webs and chords, pipe, columns, and fixtures) .

(B)



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8.10.7.2.1.4


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Sidewall sprinklers shall be positioned in accordance with Figure 8.10.7.2.1.4 Figure 8.10.7.2.1.4(a) and Figure8.10.7.2.1.4(b) when obstructions are present.

Figure 8.10.7.2.1.4(a) Minimum Distance from an Obstruction in the Vertical Orientation (Residential SidewallSprinkler)

Figure 8.10.7.2.1.4(b) Minimum Distance from an Obstruction in the Horizontal Orientation (Residential SidewallSprinkler)


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Fig_8.10.7.2.1.4_a_.pdf

Fig_8.10.7.2.1.4_b_.pdf




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Public Comment No. 293-NFPA 13-2014 [Sections 8.10.7.2.1.3, 8.10.7.2.1.4]


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8.15.1.2.1*

Concealed spaces of noncombustible and limited-combustible construction with minimal combustible loading having no accessshall not require sprinkler protection.

8.15.1.2.1.1

The space shall be considered a concealed space even with small openings such as those used as return air for a plenum.

8.15.1.2.1.2

Small openings with a combined total area of not more than 20 percent of the ceiling, construction feature, or plane used todetermine the boundaries of the concealed space shall be permitted where length greater than 4 ft shall not have a widthgreater than 8 in.

8.15.1.2.1.3

The space above cloud ceilings meeting the requirements in 8.15.24.1 and having openings with a combined total area ofnot more than 20 percent of the ceiling, construction feature, or plane used to determine the boundaries of the concealedspace shall be permitted.




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8.15.8.2* Closets and Pantries.

Sprinklers are not required in clothes closets, linen closets, and pantries within dwelling units in hotels and motels where the

area of the space does not exceed 24 ft2 (2.2 m2), the least dimension does not exceed 3 ft (0.9 m), and the walls and ceilingsare surfaced with noncombustible or limited-combustible materials.




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CommitteeStatement:

This section was reviewed based on First Correlating Note #19. These modifications were made so that NFPA 13and NFPA 13R would correlate when it comes to the closet criteria.

ResponseMessage:



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8.15.15 Drop-Out Ceilings and Ceiling Materials .

8.15.15.1*

Drop-out ceilings and ceiling materials shall be permitted to be installed beneath sprinklers where ceilings the ceiling panelsor ceiling materials are listed for that service and are installed in accordance with their listings.

8.15.15.2

Drop-out ceilings and ceiling materials meeting the criteria in 8.15.15.1 shall not be installed below quick-response orextended coverage sprinklers unless specifically listed for that application.

8.15.15.3

Drop-out ceilings and ceiling materials meeting the criteria in 8.15.15.1 shall not be considered ceilings within the context ofthis standard.

8.15.15.4*

Piping installed above drop-out ceilings and ceiling materials meeting the criteria in 8.15.15.1 shall not be consideredconcealed piping.

8.15.15.5*

Sprinklers shall not be installed beneath drop-out ceilings or ceiling materials meeting the criteria in 8.15.15.1 .



13_SR_18_A_8_15_15_edited_rev_MJK_.docx




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CommitteeStatement:

A membrane product has been evaluated by UL using UL Subject 723S and is currently listed as being suitable for beinginstalled beneath sprinklers. This particulare membrane product contains seams that will fail during a fire and as such,does not impact the ability of the water to reach the hazard being protected. The activation time for the sprinklers wasminimally impacted during the UL test. The UL test acceptance criteria addresses the impact the product may have on theactivation time of the sprinkler and the percent of material that needs to "drop out" so as not to significantly impact theability of the water to reach the hazard being protected.

The NFPA Technical Committee on Finishing Processes (NFPA 33) has recommended the acceptance of the concept(involving membrane enclosures for indoor and outdoor spray applications) using the same criteria and based uponfeedback from an NFPA 13 task group.

Recognition in the Standard for such listed products offers a solution that addresses those instances in which a membraneneeds to be installed between the sprinklers and the floor and potentially eliminating the use of other methods that havehistorically been used and that are more likely to adversely impact the performance of the sprinkler system.

ResponseMessage:


Public Comment No. 335-NFPA 13-2014 [New Section after A.8.15.14]


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A.8.15.15.1 There are ceiling panels and ceiling materials that have been investigated as a ceiling material in accordance with UL Subject 723S, Outline of Investigation for Drop-Out Ceilings Installed Beneath Automatic Sprinklers, or as FM Class Number 4651, Plastic Suspended Ceiling Panels. Such ceiling panels and ceiling materials are designed such that the activation of the sprinkler and the ability of the sprinkler discharge to reach the hazard being protected are not adversely impacted.

Second Revision No. 138-NFPA 13-2014 [ New Section after 8.15.23.3.1 ]

8.15.26* Sprinkler-Protected Glazing .

Where sprinklers are used in combination with glazing as an alternative to a required fire-rated wall or window assembly, thesprinkler-protected assembly shall comply with the following:

(1) Sprinklers shall be listed as specific application window sprinklers unless the standard spray sprinklers are specificallypermitted by the building code.

(2) Sprinklers shall be supplied by a wet-pipe system.

(3) Glazing shall be heat-strengthened, tempered, or glass ceramic and shall be fixed.

(4) Where the assembly is required to be protected from both sides, sprinklers shall be installed on both sides of theglazing.

(5) The use of sprinkler-protected glazing shall be limited to non-load-bearing walls.

(6) The glazed assembly shall not have any horizontal members that would interfere with uniform distribution of water overthe surface of the glazing, and there shall be no obstructions between sprinklers and glazing that would obstruct waterdistribution.

(7) The water supply duration for the design area that includes the window sprinklers shall not be less than the requiredrating of the assembly







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CommitteeStatement:

Sprinkler protected glazing has been permitted in atriums, exterior walls and other applications approved by code officialsfor more than 20 years. Recent actions in building codes have attempted to diminish the permissible use of theseassemblies, and by providing specific provisions in NFPA 13 or NFPA 13R (proposals have been submitted to bothstandards), questions regarding the lack of appropriate installation requirements would be resolved. The proposedprovisions are consistent with limitations currently in place in building codes and established by UL and ICC-ES.

ResponseMessage:



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A.8.15.25 It is not the intent of this section to apply to sprinkler protection of glass atrium enclosures, pedestrian walkways, which are permitted by NFPA 101, or model building codes to be protected by standard spray sprinklers installed in accordance with the special provisions set forth in those codes for atrium construction. In some cases, sprinkler protected assemblies as an alternative to a required fire-rated wall or window assembly could require the approval of the building official.

Second Revision No. 61-NFPA 13-2014 [ New Section after 8.15.23.3.1 ]

8.15.24 Cloud Ceilings.

8.15.24.1*

Sprinklers shall be permitted to be omitted above cloud ceilings where both of the following apply:

(1)

(2) The requirements of 8.15.24.2 are met.

Table 8.15.24.1 Maximum Sprinkler Protection Area Based on Ceiling Cloud Width and Opening Width

Ceiling Cloud —Minimum WidthDimension (ft)

Maximum Area (ft 2 ) —Opening Width ≤0.5 in./ ft of

Ceiling Height

Maximum Area (ft 2 ) —Opening Width ≤0.75 in./ ft of

Ceiling Height

Maximum Area (ft 2 ) —Opening Width ≤1 in./ ft of

Ceiling Height

2–<2.5 175 70 NP

2.5–4 225 120 70

>4 225 150 150

8.15.24.2

When sprinklers are omitted from above a cloud ceiling in accordance with 8.15.24.1 , the requirements of this section shallapply.

8.15.24.2.1

All sprinklers shall be quick response standard spray or extended coverage pendent or upright sprinklers.

8.15.24.2.1.1

Where extended coverage sprinklers are used, the maximum distance between sprinklers shall not exceed 16 ft.

8.15.24.2.2

Maximum cloud ceiling height shall not exceed 20 ft.

8.15.24.2.3

Maximum spacing shall not exceed the maximum requirements of Table 8.6.2.2.1(a) for light hazard and Table 8.6.2.2.1(b)for ordinary hazard.

8.15.24.2.4

Cloud ceilings shall be of smooth ceiling construction.

8.15.24.2.5*

For irregular shaped ceiling clouds (not rectangular) the minimum width dimension shall be the smallest width dimension ofthe cloud and for the gap shall be the greatest dimension between clouds or adjacent walls as applicable.



Figure_8.15.24.2.5.pdf

13_SR_61_Table_8.15.24.1_edited.docx





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CommitteeStatement:

This second draft revision addresses the results of research performed by the Fire Protection Research Foundation andthe Academy of Fire Sprinkler Technology. It refines the concept of cloud ceiling for NFPA 13 as a type of concealed spacethat does not require sprinklers within the concealed space. It more clearly defines small openings in concealed spaces. Itdefines the maximum sizes of small openings through maximum dimensions and overall percentages of open ceiling area.

* The openings around the cloud and the maximum sprinkler protection area meet the requirements of 8.15.1.2.1.2and Table 8.15.24.1


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These quantities are based on the testing and research performed by the Fire Protection Research Foundation (FPRF) oncloud ceiling size.





ResponseMessage:



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Table 8.15.24.1 Maximum Sprinkler Protection Area Based on Ceiling Cloud Width and Opening Width

Ceiling Cloud — Minimum Width Dimension (ft)

Maximum Area (ft2) — Opening Width <=0.5 in./ ft of Ceiling Height

Maximum Area (ft2) — Opening Width <=0.75 in./ ft of Ceiling Height

Maximum Area (ft2) — Opening Width <=1 in./ ft of Ceiling Height

2–<2.5 175 70 NP

2.5–4 225 120 70

>4 225 150 150

COMP: Please change the “<=” to a “less than or equal to” sign (with the line under the less than sign).

A.8.15.24.1 An opening in the ceiling can be located along a wall or can occur between panels to give an architectural effect such as a floating ceiling. Fire modeling results have shown that there will be heat loss to the space above the ceiling when the openings are too large. The modeling results indicate that sprinklers should activate on the lower ceiling level when the opening dimension is no greater than one inch per foot of elevation above the floor. When an opening between ceiling panels, or a ceiling panel and a wall, are any larger, the space above the ceiling panels should not be considered a concealed space. Figure A.8.15.24.1 shows plan and elevation views of a cloud ceiling installation.

A.8.15.24.1(1) To determine the maximum allowed gap distance for omission of sprinklers above cloud ceilings the following formula can be used.

A / B = X

A = inches of gap between clouds or between a cloud and a wall

B = ceiling height

X = maximum inches of gap

Example:

A = 9 in. maximum gap dimension

B = 14 ft ceiling height

X = 0.64 in. of gap/ft of ceiling height

Therefore, <=0.75 in. of gap/ft of ceiling height spacing used.

COMP: Please change the “<+” to a “less than or equal to” sign (with the line under the less than sign), then delete this comment.

FIGURE A.8.15.24.1 Cloud Ceiling Openings.

A.8.15.24.2.5 The research testing and modeling used to determine the base data used for Table 8.15.24.1 is based on rectangular and equally spaced cloud configurations. Nonrectangular shapes are allowed to be considered with this section; however, the minimum width of the cloud and maximum width of the gap should be used to determine the worst geometric shape creating a conservative approach. Figure A.8.15.24.2.5 provides an example of an irregular cloud.

FIGURE A.8.15.24.2.5 Irregular Shaped Cloud Dimensioning.


8.15.25.2 Indoor Swimming Pools.

8.15.25.2.1

The area directly above indoor swimming pools shall not require sprinkler protection unless the requirements of 8.15.24.2.2apply.

8.15.25.2.2

The area above indoor swimming pools equipped with moveable hard covers that allow the area to be used for athleticactivities other than swimming and other water sports shall require sprinkler protection.

8.15.25.2.3

Sprinklers shall be installed in all areas adjacent to indoor swimming pools.




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CommitteeStatement:

This exemption should not be added to the standard. Not all indoor swimming pools are vacant of occupancies. Someinstallations include wooden bridges spanning them, swim-up bars in the centre, couches and other combustiblesimmediately at the perimeters etc. Additionally, many indoor swimming pools enclosures are of combustible construction orhave combustible finishes. Also, even if a pool is not originally fitted with a hard cover, one could easily be addedafterwards. Therefore, if a pool itself won't burn, the things that go in and around it most certainly can, and sprinklersshould be required.

ResponseMessage:




Public Comment No. 369-NFPA 13-2014 [Sections 8.15.24.2.1, 8.15.24.2.2, 8.15.24.2.3]


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8.16.1.1.3.4

Check valves shall be installed in a vertical (flow upwards) or horizontal position in accordance with their listing.




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CommitteeStatement:

As noted in the Substantiation for PI 290, a common mistake in design and in installation is to install check valves in avertical “flow downwards” orientation. See the image below as an example:

See the uploaded file for the Figure

Fire protection check valves are not listed for this “flow downwards” orientation, but many designers and installers do notseem to be aware of this and they do not routinely have or they do not check the listing criteria or manufacturer’sliterature for this type of detail. This leads to installation errors in the field.

Many such installation errors could be eliminated, simply by adding the two words “flow upwards” into the Section.

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8.16.4.1.4.2

Heat tracing systems shall be supervised by one of the following methods:

Central station, proprietary, or remote station signaling service

Local signaling service that will cause a signal at a constantly attended location

Electric supervision of the heat-tracing system shall provide positive confirmation that the circuit is energized.




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CommitteeStatement:

This proposal is not appropriate for NFPA 13, which is provides the minimum requirements, such that the waterflowalarm and the control valves do not require electrical supervision. The proposal for such severe electrical supervision forheat tracing is therefore beyond what can be reasonably asked for. The existing requirement to simply provide positiveconfirmation should stay in effect.

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8.16.6* Air Venting.

The vent required by 7.1.5 shall be located near the highest a high point in the system to remove the majority allow air to beremoved from that portion air of the system by one of the following methods:

(1) Manual valve, minimum 1⁄2 in. size

(2) Automatic air vent

(3) Other approved means




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CommitteeStatement:

This revision is suggested because a single air vent, even one located at the highest point of a system, cannot beexpected to expel "the majority" of air from the system. All that should be asked for is that air be removed. The referenceto A.8.16.4.2.2 was added to direct the users of the standard to the place in the Annex where the purpose of the air ventis explained.

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8.18 Electrical Bonding and Grounding.

8.18.1

Fire sprinkler systems shall be permitted to be used for bonding in accordance with NFPA 70 . In no case shall sprinklersystem piping be used for the grounding of electrical systems.

See SR-53

8.18.2*

Fire sprinkler systems shall not be used for grounding of electrical systems. The requirement of 8.18.1 shall not preclude thebonding of the sprinkler system piping to the lightning protection grounding system as required by NFPA 780 in those caseswhere lightning protection is provided for the structure.




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CommitteeStatement:

Editorial revision to co-ordinate the text with the similar provisions for grounding and bonding of NFPA 24.

A sprinkler system is not "used for" bonding, it is "bonded to". Therefore, the wording of NFPA 24 should befollowed more closely.

Response Message:

Public Comment No. 154-NFPA 13-2014 [Section No. 8.18]


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Second Revision No. 45-NFPA 13-2014 [ Sections 25.2.1.4, 25.2.1.5, 25.2.1.6 ]

25.2.1.4

Modifications to existing piping systems shall not require testing in excess of at system working pressure.

25.2.1.4.1

Where additions are modification is made to an existing system, affecting more than 20 sprinklers, the new portion shall beisolated and tested at not less than 200 psi (13.8 bar) for 2 hours.

25.2.1.4.2

Modifications that cannot be isolated, such as relocated drops, shall require testing at system working pressure.

25.2.1.5

Where additions are made to an existing system, the new portion shall be isolated and tested at not less than 200 psi (13.8bar) for 2 hours.

25.2.1.6

Loss shall be determined by a drop in gauge pressure or visual leakage.




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Committee Statement

CommitteeStatement:

The proposed revision should not be accepted. As it is now proposed, any new addition to a sprinkler system, such asone sprinkler for a new washroom or two sprinklers for a new office will require a minimum 200 psi hydrostatic test. Suchsmall installations cannot be easily isolated; to do so would be an impractical and expensive undertaking. Nodocumentation has been offered as to why the exemption for 20 sprinklers is being deleted. This will cause problems andundue expense in the field if this new wording is adopted.

ResponseMessage:




Public Comment No. 179-NFPA 13-2014 [Sections 25.2.1.4, 25.2.1.5, 25.2.1.6]



Public Comment No. 215-NFPA 13-2014 [New Section after 25.2.1.5]


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25.2.2 Dry Pipe and Double Interlock Preaction System(s) Air Test.

25.2.2.1

In addition to the standard hydrostatic test, an air pressure leakage test at 40 psi (2.8 bar) shall be conducted for 24 hours. Anyleakage that results in a loss of pressure in excess of 11⁄2 psi (0.1 bar) for the 24 hours shall be corrected.

25.2.2.1.1

Modifications to existing systems shall be tested for air leakage using one of the following test methods:

(1) An air pressure test at 40 psi (3.2 bar) shall be performed for 2 hours.

(a) The system shall be permitted to lose up to 3 psi (0.2 bar) during the duration of the test.

(b) Air leaks shall be addressed if the system loses more than 3 psi (0.2 bar) during this test.

(2) With the system at normal system air pressure, the air source shall be shut off for 4 hours. If the low pressure alarmgoes off within this period, the leaks shall be addressed.

25.2.2.2

Where systems are installed in spaces that are capable of being operated at temperatures below 32°F (0°C), air or nitrogengas pressure leakage tests required in 25.2.2 shall be conducted at the lowest nominal temperature of the space.




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Committee Statement

CommitteeStatement:

Modification to dry and preaction systems are required to be air tested. New language gives direction for testingmodifications to dry and double interlocked systems utilizing the test language from NFPA 25 for existing systems.

ResponseMessage:



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Second Revision No. 46-NFPA 13-2014 [ Section No. A.3.3.4 ]

Global SR-56

A.3.3.4 Ceiling Pocket.

It is not the intent of this definition to be applied to structural and/or framing members otherwise used to define obstructed orunobstructed construction. Ceiling pockets can be protected or unprotected. A ceiling pocket where the upper ceiling is withinthe allowable vertical distance from the sprinkler deflector should be considered a protected ceiling pocket. Buildings withprotected ceiling pockets are permitted to use the quick-response reduction of 11.2.3.2.3 . Buildings with unprotected ceiling

pockets greater than 32 ft 2 ( 9.8 3.0 m 2 ) are not allowed to use the quick-response reduction of 11.2.3.2.3 . An architecturalceiling feature that consists of a bounded area of ceiling located at a higher elevation than the attached lower ceiling, andwhere the depth of the pocket is greater than the allowable distance, a sprinkler deflector can be located from the higherceiling elevation.




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Committee Statement

CommitteeStatement:

The proposed new sentence is obscure, the sentence structure is poor and it does not add any value to the section, in factit is contradictory. The Committee Statement says that the additional verbiage is to clarify that where a sprinkler can belocated in the lower ceiling and still meet the deflector distance rule; the upper ceiling should not be considered a ceilingpocket. However, this is contrary to the actual 3.3.4 definition and to the 2nd sentence of A.3.3.4, which says that a ceilingpocket where the upper ceiling is within the allowable vertical distance from the sprinkler deflector should be considered aprotected ceiling pocket.

ResponseMessage:

Public Comment No. 180-NFPA 13-2014 [Section No. A.3.3.4]


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Second Revision No. 163-NFPA 13-2014 [ Section No. A.3.9.1.18 ]

A.3.9.1.18 Miscellaneous Storage.

The sprinkler system design criteria for miscellaneous storage at heights below 12 ft (3.7 m) are covered by this standard inChapter 12 13 . Chapter 12 13 describes design criteria, and Section 8.2 describes installation requirements (area limits).These requirements apply to all storage of 12 ft (3.7 m) or less in height.




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Submittal Date: Fri Aug 22 07:11:52 EDT 2014

Committee Statement

Committee Statement: Editorial change to correct Chapter reference to the appropriate chapter.

Response Message:


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Second Revision No. 118-NFPA 13-2014 [ New Section after A.3.9.3.7 ]

A.3.9.3.7.7 Single-Row Racks.

When a narrow rack with a depth up to 6 ft (1.8 m) is located within 24 in. (600 mm) of a wall, it is considered to have alongitudinal flue and is treated as a double-row rack.




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Submittal Date: Fri Jun 27 14:39:05 EDT 2014

Committee Statement

CommitteeStatement:

This text supports the change submitted on chapter 17 (PI-119) which incorrectly calls a narrow rack against the wall asingle row rack which conflicts with ch 16 identifying them as a double row rack. The committee statement on PI-119states that the narrow rack against the wall is a single row rack AND that the space between the rack and the wall is alongitudinal flue. The definition of a single row rack (3.9.3.7.5) explicitly states that it is a rack of up to 6 ft with nolongitudinal flue space. This issue is obviously not well understood and some clarifying text is warranted.

ResponseMessage:

Public Comment No. 103-NFPA 13-2014 [New Section after A.3.9.3.7]


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Second Revision No. 119-NFPA 13-2014 [ Section No. A.3.9.3.8 ]

A.3.9.3.8 Solid Shelving.

The placement of loads affects the calculated area of the shelf. It is the intent to apply this definition to loads on the rack where6 in. (150 mm) nominal flues are not provided on all four sides, regardless of whether shelving materials are present. See16.1.6.3 and 17.1.5.3 for additional allowances for double-row racks up 25 ft (7.6 m) and for multiple-row racks of any heightwithout a longitudinal flue space.




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Submittal Date: Fri Jun 27 14:40:05 EDT 2014

Committee Statement

CommitteeStatement:

Sections 16.1.6.3 and 17.1.5.3 provide allowances for double-row racks up to 25 ft without a longitudinal flue andmulti-row racks of any height without longitudinal flues to not be considered as solid shelving provided transverse fluesare provided every 5 ft maximum. This shoud be recoginize when trying to apply the definition of solid shelf in Chapter 3.

ResponseMessage:

Public Comment No. 253-NFPA 13-2014 [Section No. A.3.9.3.8]


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Second Revision No. 22-NFPA 13-2014 [ Section No. A.6.2.1.1.1 ]

A.6.2.1.1.1

Provided dry sprinklers are removed by utilizing a pipe wrench on the barrel, where permitted by the manufacturer, they canbe reinstalled. If a dry sprinkler is removed by utilizing the sprinkler wrench on the boss of the sprinkler, the dry sprinklershould not be reinstalled.




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Committee Statement

Committee Statement: The removal of this section is intended to correlate with SR 22.

Response Message:

Public Comment No. 183-NFPA 13-2014 [Sections A.6.2.1.1, A.6.2.1.1.1]


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Second Revision No. 162-NFPA 13-2014 [ Section No. A.6.9 ]


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A.6.9


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Table A.6.9 is a summary of the requirements for signs in NFPA 13.

Table A.6.9 Sprinkler System Signage Summary

Section Sign Location Sign Information/Requirements

6.7.4 Control valves Identification sign

Drain valves

Test connection valvesSign must be made of weatherproof metal or rigid plastic andattached with corrosion-resistant wire or chain

7.6.1.4 and 7.6.1.5 Antifreeze system main valve Indicate the following:

Circulating closed loop systems Antifreeze manufacturer

Antifreeze type

Antifreeze concentration

7.7.1.5 All valves controlling sprinklers Sign worded as follows:

“This valve controls fire protection equipment.

Do not close until after fire has been extinguished.

Use auxiliary valves when necessary to shut off supply toauxiliary equipment.

Caution: Automatic alarm may be sounded if this valve isclosed.”

8.16.1.1.8 Control valves Indicate valve function

Indicate system being controlled

8.16.2.5.3.7 Dry valve Number of low point drains

Preaction valve Location of each drain

8.17.2.4.5Fire department connections not servingthe whole building

Indicate portion of the building served by the fire departmentconnection

8.17.2.4.7 All fire department connections Indicate systems served by the fire department connection

Indicate system pressure demand (for systems requiring morethan 150 psi)

Letters must be 1 in. in height

25.5 Alarm valve Indicate the following:

Dry pipe valve Location of the design area or areas

Preaction valve Discharge densities over the design area or areas

Deluge valve Required flow and residual pressure demand at the base ofthe riser

Occupancy classification or commodity classification andmaximum permitted storage height and configuration

Hose stream allowance

The installing contractor

Sign must be made of weatherproof metal or rigid plastic andattached with corrosion-resistant wire or chain

25.6 System control riser Indicate the following:

Antifreeze loops Name and location of the facility

Auxiliary systems Occupancy and commodity classification

Control valves Flow test data

Original main drain flow test results

Presence of encapsulated pallet loads

Presence of solid shelving

Presence of flammable/combustible liquids

Presence of hazardous materials

Presence of other special storage

Presence of antifreeze or other auxiliary systems

Maximum storage height

Aisle width

Location of auxiliary drains and low point drains on dry pipeand preaction systems

Installing contractor or designer


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Section Sign Location Sign Information/Requirements

Sign must be made of weatherproof metal or rigid plastic andattached with corrosion-resistant wire or chain

26.2.7.5Fire department connection (FDC)

18 in. × 18 in. sign

FDC symbol from NFPA 170

Located at connection in plain sight from shore access point

A.18.17.1 A.8.17.1 Central station, auxiliary, remote station,or proprietary protective signalingsystems

Recommended:

Located near the device

Direct people to call police or fire department when bell rings




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Submittal Date: Fri Aug 22 07:08:23 EDT 2014

Committee Statement

Committee Statement: Editorial change to correct reference from A.18.17.1 to A.8.17.1.

Response Message:


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Second Revision No. 52-NFPA 13-2014 [ Section No. A.8.16.2.4.2 ]

A.8.16.2.4.2

This is a very practical means for performing the forward flow test of at the backflow device as required by 8.17.4.5.1.




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Committee Statement

Committee Statement: Editorial revision for clarity.

Response Message:

Public Comment No. 184-NFPA 13-2014 [Section No. A.8.16.2.4.2]


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A.8.16.6

A manual or automatic air venting valve can be a reasonable approach on wet pipe sprinkler systems to reduce corrosionactivity. The purpose of the air venting valve is to exhaust as much trapped air as possible from a single location every time thesystem is filled. The objective of venting is to reduce the amount of oxygen trapped in the system that will fuel corrosion andmicrobial activity. It is neither the intent nor practical to exhaust all trapped air from a single location on a wet pipe sprinklersystem; however, more than one vent can be used on a system at the designer's discretion. Interconnection of branch linepiping for venting purposes is not necessary. An inspector's test valve can serve this purpose.

The air venting valve should be located where it will be most effective. System piping layout will guide the designer in choosingan effective location for venting. In order to effectively accomplish venting, it is necessary to choose a location where thegreatest volume of trapped air is vented during the first fill and each subsequent drain and fill event. The vent connection to thesystem should be located off the top of horizontal piping at a high point in the system; however, the vent connection can also beeffectively located off the side of a riser or riser nipple at a high point in the system.

Manual air venting valves should be accessible. The manual air venting valve should be located at an accessible point andpreferably not over 7 ft (2 m) above the floor. Automatic air valves are not required to comply with the accessibility requirementof manual air venting valves; however, it is recommended the designer locate automatic air vents over areas without ceilings,above a lay-in ceiling, or above an access panel.

Each wet pipe sprinkler system should be vented every time the system is filled.




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Committee Statement

Committee Statement: The revision clarifies that the ITC can serve as the manual vent valve.

Response Message:


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A.8.18.2

While the use of the sprinkler system piping as the grounding electrode for the building is prohibited, NFPA 70 requires that allmetallic piping systems be bonded to disperse stray electrical currents. Therefore, the sprinkler system piping should might bebonded to other metallic systems.




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Committee Statement

CommitteeStatement:

Editorial revision to co-ordinate the text with the similar provisions for grounding and bonding of NFPA 24.

A sprinkler system is not "used for" bonding, it is "bonded to". Therefore, the wording of NFPA 24 should befollowed more closely.

Response Message:

Public Comment No. 155-NFPA 13-2014 [Section No. A.8.18.1]


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