Public Input No. 106-NFPA 13-2013 [ Global Input ]

Public Input No. 106-NFPA 13-2013 [ Global Input ]

16.1.8 In-Rack Sprinklers.

16.1.8.1 The number of sprinklers and the pipe sizing on a line of sprinklers in racks shall berestricted only by hydraulic calculations and not by any piping schedule.

16.1.8.2 16.2.1.4.2.3 * In-rack sprinklers shall be located at an intersection of transverse andlongitudinal flues while not exceeding the maximum spacing rules.

(A) 16.1.8.2.1 Where distances between transverse flues exceed the maximum allowabledistances, sprinklers shall be installed at the intersection of the transverse and longitudinal fluesand additional sprinklers shall be installed between transverse flues to meet the maximum distancerules.

(B) 16.1.8.2.2 Where no transverse flues exist, in-rack sprinklers shall not exceed the maximumspacing rules.

16.1.8.3 16.2.1.4.2.5* In single- or double-row racks without solid shelves with storage over 20 ft(6.1 m) high, or In multiple-row racks, or in single- or double-row racks with solid shelves andstorage height up to and including 25 ft (7.6 m), A minimum of 6 in. (152 mm) vertical clear spaceshall be maintained between the in-rack sprinkler deflectors and the top of a tier of storage.

16.1.8.3.1 16 .2.1.4.2.4* The elevation of in-rack sprinkler deflectors with respect to storageshall not be a consideration in single- or double-row rack storage up to and including 20 ft (6.1 m)high. (See Section C.16.)

16.1.8.3.2 16.2.1.4.2.5* In single- or double-row racks without solid shelves with storage over 20ft (6.1 m) high, or In multiple-row racks, or in single- or double-row racks with solid shelves andstorage height up to and including 25 ft (7.6 m), a minimum of 6 in. (152 mm) vertical clear spaceshall be maintained between the in-rack sprinkler deflectors and the top of a tier of storage.

16.1.8.4 16.2.1.4.2.5 (A) Sprinkler discharge shall not be obstructed by horizontal rackmembers.

16.1.8.5 16.2.1.4.2.7 Sprinklers installed in racks shall be located at least 3 inches from rackuprights.

16.1.8.2 .6 When in-rack sprinklers are necessary to protect a higher-hazard commodity thatoccupies only a portion of the length of a rack, in-rack sprinklers shall be extended a minimum of 8ft (2.44 m) or one bay, whichever is greater, in each direction along the rack on either side of thehigher hazard. The in-rack sprinklers protecting the higher hazard shall not be required to extendacross the aisle.

16.1.8.6.1 The in-rack sprinklers protecting the higher hazard shall not be required to extendacross the aisle.

16.1.8.3 .7 Where a storage rack, due to its length, requires less than the number of in-racksprinklers specified, only those in-rack sprinklers in a single rack shall be included in thecalculation.

16.2.1.4 In-Rack Sprinkler Requirements where Sprinklers for Rack Storage of Class I Through ClassIV Commodities Stored Up to and Including 25 ft (7.6 m) in Height Protected with Control ModeDensity/ Area Sprinklers Are Being Used at Ceiling.

16.2.1.4.1 In-Rack Sprinkler Location of In-Rack Sprinklers for Rack Storage of Class I Through ClassIV Commodities Stored Up to and Including 25 ft (7.6 m) in Height.

16.2.1.4.1.1 In single- or double-row racks without solid shelves, in-rack sprinklers shall be installed inaccordance with Table 16.2.1.3.2.

16.2.1.4.1.2 In multiple-row racks no deeper than 16 ft (4.9 m) with aisles 8 ft (2.4 m) or more in width,in-rack sprinklers shall be installed in accordance with Table 16.2.1.3.3.1.

16.2.1.4.1.3 In multiple-row racks deeper than 16 ft (4.9 m) or with aisles less than 8 ft (2.4 m) wide, in-rack

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

1 of 973 11/7/2013 10:59 AM

sprinklers shall be installed in accordance with Table 16.2.1.3.3.2.

16.2.1.4.1.4 In-rack sprinklers at one level only for storage up to and including 25 ft (7.6 m) high shall belocated at the first tier level at or above one-half of the storage height.

16.2.1.4.1.5 In-rack sprinklers at two levels only for storage up to and including 25 ft (7.6 m) high shall belocated at the first tier level at or above one-third and two-thirds of the storage height.

16.2.1.4.2 In-Rack Sprinkler Spacing of In-Rack Sprinklers for Rack Storage of Class I Through ClassIV Commodities Stored Up to and Including 25 ft (7.6 m) in Height Protected by Control ModeDensity/Area Sprinklers at the Ceiling.

16.2.1.4.2.1* Maximum horizontal spacing of in-rack sprinklers in single- or double-row racks up to andincluding 25 ft (7.6 m) in height shall be in accordance with Table 16.2.1.4.2.1.

16.2.1.4.2.2* Maximum horizontal spacing and maximum area of coverage of in-rack sprinklers on branchlines, in multiple-row racks with storage up to and including 25 ft (7.6 m) in height, shall be in accordancewith Table 16.2.1.4.2.2.

(A) The rack plan view shall be considered in determining the area covered by each sprinkler.

(B) The aisles shall not be included in area calculations.

16.2.1.4.2.3* In-rack sprinklers shall be located at an intersection of transverse and longitudinal flues whilenot exceeding the maximum spacing rules.

(A) Where distances between transverse flues exceed the maximum allowable distances, sprinklers shall beinstalled at the intersection of the transverse and longitudinal flues and additional sprinklers shall be installedbetween transverse flues to meet the maximum distance rules.

(B) Where no transverse flues exist, in-rack sprinklers shall not exceed the maximum spacing rules.

16.2.1.4.2.4* The elevation of in-rack sprinkler deflectors with respect to storage shall not be a considerationin single- or double-row rack storage up to and including 20 ft (6.1 m) high. (See Section C.16.)

16.2.1.4.2.5* In single- or double-row racks without solid shelves with storage over 20 ft (6.1 m) high, or inmultiple-row racks, or in single- or double-row racks with solid shelves and storage height up to andincluding 25 ft (7.6 m), a minimum of 6 in. (152 mm) vertical clear space shall be maintained between thein-rack sprinkler deflectors and the top of a tier of storage.

(A) Sprinkler discharge shall not be obstructed by horizontal rack members.

16.2.1.4.2.6 For multiple-row racks, a minimum of 6 in. (152 mm) shall be maintained between the in-racksprinkler deflector and the top of a tier of storage.

16.2.1.4.2.7 Sprinklers installed in racks shall be spaced without regard to rack uprights. (See SectionC.17.)

16.2.1.4.3 In-Rack Sprinkler Water Demand for Rack Storage of Class I Through Class IVCommodities Stored Up to and Including 25 ft (7.6 m) in Height Protected by Control ModeDensity/Area Sprinklers in the Ceiling. See Section C.18.

16.2.1.4.4 In-Rack Sprinkler Discharge Pressure for Rack Storage of Class I Through Class IVCommodities Stored Up to and Including 25 ft (7.6 m) in Height Protected by Control ModeDensity/Area Sprinklers at the Ceiling.

16.3 Protection Criteria for Rack Storage of Class I Through Class IV Commodities Stored Over 25 ft(7.6 m) in Height.

16.3.1.3 In-Rack Sprinkler Requirements Where Sprinklers for Rack Storage of Class I Through ClassIV Commodities Stored Over 25 ft (7.6 m) in Height Protected with Control Mode Density/AreaSprinklers Are Being Used at Ceiling.

16.3.1.3.1 In-Rack Sprinkler Location of In-Rack Sprinklers for Rack Storage of Class I Through ClassIV Commodities Stored Over 25 ft (7.6 m) in Height Protected with Control Mode Density/AreaSprinklers at Ceiling.

16.3.1.3.1.1* Double-Row Racks.

(A) In double-row racks without solid shelves and with a maximum of 10 ft (3.1 m) between the top ofstorage and the ceiling, in-rack sprinklers shall be installed in accordance with Table 16.3.1.1 and Figure16.3.1.3.1.1(A)(a) through Figure 16.3.1.3.1.1(A)(j). The highest level of in-rack sprinklers shall be not morethan 10 ft (3.1 m) below the top of storage. Where a single-row rack is mixed with double-row racks, Table16.3.1.1 and Figure 16.3.1.3.1.1(A)(a) through Figure 16.3.1.3.1.1(A)(j) shall be used.


2 of 973 11/7/2013 10:59 AM

(B) Figure 16.3.1.3.1.2(A)(a) through Figure 16.3.1.3.1.2(A)(c) shall be permitted to be used for theprotection of the single-row racks.

16.3.1.3.1.2* Single-Row Racks.

(A) In single-row racks without solid shelves with storage height over 25 ft (7.6 m) and a maximum of 10 ft(3.1 m) between the top of storage and the ceiling, in-rack sprinklers shall be installed in accordance withTable 16.3.1.1 and Figure 16.3.1.3.1.2(A)(a) through Figure 16.3.1.3.1.2(A)(e).

(B) In single-row racks, where figures show in-rack sprinklers in transverse flue spaces centered betweenthe rack faces, it shall be permitted to position these in-rack sprinklers in the transverse flue at any pointbetween the load faces.

16.3.1.3.1.2.1 In single-row racks, where figures show in-rack sprinklers in transverse flue spaces centeredbetween the rack faces, it shall be permitted to position these in-rack sprinklers in the transverse flue at anypoint between the load faces.

16.3.1.3.1.2.2 Where a single-row rack is mixed with double-row racks, Table 16.3.1.1 and Figure16.3.1.3.1.1(A)(a) through Figure 16.3.1.3.1.1(A)(j) shall be used.

16.3.1.3.1.3* In-Rack Sprinkler Location Multiple-Row Racks for Rack Storage of Class I ThroughClass IV Commodities Stored Over 25 ft (7.6 m) in Height Protected with Control Mode Density/AreaSprinklers at Ceiling.

(A) In multiple-row racks with a maximum of 10 ft (3.1 m) between the top of storage and the ceiling,protection in-rack sprinklers shall be installed in accordance with Table 16.3.1.2 and in-rack sprinklers shallbe installed as indicated in Figure 16.3.1.3.1.3(A)(a) through Figure 16.3.1.3.1.3(A)(c).

(B) The highest level of in-rack sprinklers shall be not more than 10 ft (3.1 m) below maximum storageheight for Class I, Class II, or Class III commodities or 5 ft (1.5 m) below the top of storage for Class IVcommodities.

16.3.1.3.1.4 The highest level of in-rack sprinklers shall be not more than 10 ft (3.1 m) below the top ofstorage.

16.3.1.3.1.4.1 In multiple-row rack and Class IV commodities, the highest level of in-rack sprinklers shall benot more than 5 ft (1.5 m) below the top of storage.

16.3.1.3.2 In-Rack Sprinkler Spacing of In-Rack Sprinklers for Rack Storage of Class I Through ClassIV Commodities Stored Over 25 ft (7.6 m) in Height Protected with Control Mode Density/AreaSprinklers at Ceiling.

16.3.1.3.2.1 In-Rack Sprinkler Spacing. In-rack sprinklers shall be staggered Maximum horizontally andapproximate vertically spacing of in-rack sprinklers in double-row racks shall be where installed inaccordance with Table 16.3.1.1, and Figure 16.3.1.3.1.1(A)(a) through Figure 16.3.1.3.1.1(A)(j), and Figure16.3.1.3.1.2(A)(a) through Figure 16.3.1.3.1.2(A)(e).

16.3.1.3.2.2 16.3.1.3.2.1.1 In-rack sprinklers for storage higher than 25 ft (7.6 m) in double-row racks shallbe spaced horizontally and located in the horizontal space nearest the vertical intervals specified in Table16.3.1.1 and Figure 16.3.1.3.1.1(A)(a) through Figure 16.3.1.3.1.1(A)(j).

16.3.1.3.2.2 Maximum horizontally and approximate vertically spacing of in-rack sprinklers in single-rowracks shall be where installed in accordance with Table 16.3.1.1, Figure 16.3.1.3.1.1(A)(a) through Figure16.3.1.3.1.1(A)(j), and Figure 16.3.1.3.1.2(A)(a) through Figure 16.3.1.3.1.2(A)(e).

16.3.1.3.2.2.1 In-rack sprinklers shall be spaced horizontally and located in the horizontal space nearest thevertical intervals specified in Table 16.3.1.1 and Figure 16.3.1.3.1.2(A)(a) through Figure 16.3.1.3.1.2(A)(e).

16.3.1.3.2.3 In-Rack Sprinkler Spacing. Maximum horizontal and vertical spacing of in-rack sprinklers inmultiple-row racks with storage higher than 25 ft (7.6 m) shall be in accordance with Table 16.3.1.2 andFigure 16.3.1.3.1.3(A)(a) through Figure 16.3.1.3.1.3(A)(c).

16.3.1.3.2.4* In-rack sprinklers shall be located at an intersection of transverse and longitudinal flues whilenot exceeding the maximum spacing rules.

(A) Where distances between transverse flues exceed the maximum allowable distances, sprinklers shall beinstalled at the intersection of the transverse and longitudinal flues, and additional sprinklers shall beinstalled between transverse flues to meet the maximum distance rules.

(B) Where no transverse flues exist, in-rack sprinklers shall not exceed the maximum spacing rules.

16.3.1.3.3 In-Rack Sprinkler Water Demand for In-Rack Sprinklers for Rack Storage of Class IThrough Class IV Commodities Stored Over 25 ft (7.6 m) in Height Protected with Control Mode


3 of 973 11/7/2013 10:59 AM

Density/Area Sprinklers at the Ceiling.

16.3.1.3.3.1 In-Rack Sprinkler Discharge for In-Rack Sprinklers Rack Storage of Class I ThroughClass IV Commodities Stored Over 25 ft (7.6 m) in Height Protected with Control Mode Density/AreaSprinklers at the Ceiling.

Statement of Problem and Substantiation for Public Input

There is no consistency on how or where information is presented between 16.2 and 16.3 as well as between chapters 16 and chapters 17. We effectively have 4 locations addressing the same issues in 4 different formats. This was intended to be editorial except where guidance is provided in only some of the sections. These locations were information is copied are flagged as NOT EDITORIAL in the justification.

Used 17.1.7 as format and content for GENERAL and delete repeating within sectionUsed a combination of 16.2 and 16.3.1.3 for general format.

General requirements that are applicable throughout were moved to the general section 16.1.8 as currently done in 17.1.76 clearance is universal with one exception so put in 16.1. NOT EDITORIAL added same guidance for storage greater than 25 ft Location in regard to horizontal members moved to 16.1. NOT EDITORIAL added same guidance for storage greater than 25 ft.NOT EDITORIAL 3 inch from uprights is only shown in Table 16.3.1.1 so added to General 16.1 And 17.1. NOT EDITORIAL Deleted reference to installing without regard to uprights since it conflicts with the 3 inch criteria (and is legacy text from 231C when in-racks were located in the middle of the load)

Titles for 16.2.1.4 and 16.3.1.3 copied from 17.2.1.5 and deleted redundant text already stated in 16.2.1 & 16.3.116.2.1.4.1 etc Deleted all redundant text in subtitles since clearly stated in the base title of 16.2.1. Much cleaner with the subtitle stating the subject of the section as done in 17.2

16.3.1.3.1.1 contained multiple criteria in one section so renumbered like 16.2. Relocated requirement of highest level to end of this section so as to address once instead of for each rack type. Moved mixed single with double to single row section. Deleted 16.3.1.3.1.1(B) since it is on single row so no need to address in the double-row rack section. It also references only to part of the single-row rack Figures. 16.3.1.3.2 Jumbled together without specifying which Figures apply to Double row verses single rowNo text on vertical placement for single row. Copied that identified for double row. Note that Table 16.3.1.1 said vertical is approximate for both single and double row racks.

Submitter Information Verification

Submitter Full Name: Roland HugginsOrganization: American Fire Sprinkler AssociStreet Address:City:State:Zip:Submittal Date: Mon Mar 11 16:23:15 EDT 2013

Committee Statement

Resolution: FR-315-NFPA 13-2013Statement: This First Revision moves section 16.2.1.4.2.3 along with subsections A and B (and its associated

annex note) to a new section 16.1.8.4. Rewrite the section to only apply where in-rack sprinklers areinstalled within a longitudinal flue and delete redundant sections in Chapter 16. Note that thisconsolidates 19 sections into 3, which shortens the standard, but separates the spacing rules fromthe rules regarding where to put the sprinklers. The proposed consolidation increased requirementsfor some storage heights/arrangements without sufficient data to justify the change. The committeedid see the justification to eliminate redundant requirements that could be moved to the general


4 of 973 11/7/2013 10:59 AM

section.

Copyright Assignment

I, Roland Huggins, hereby irrevocably grant and assign to the National Fire Protection Association (NFPA) all and full rights in copyright inthis Public Input (including both the Proposed Change and the Statement of Problem and Substantiation). I understand and intend that Iacquire no rights, including rights as a joint author, in any publication of the NFPA in which this Public Input in this or another similar orderivative form is used. I hereby warrant that I am the author of this Public Input and that I have full power and authority to enter into thiscopyright assignment.

By checking this box I affirm that I am Roland Huggins, and I agree to be legally bound by the above Copyright Assignment and theterms and conditions contained therein. I understand and intend that, by checking this box, I am creating an electronic signature that will,upon my submission of this form, have the same legal force and effect as a handwritten signature


5 of 973 11/7/2013 10:59 AM


17.1.7 In-Rack Sprinklers.

17.1.7.1 The number of sprinklers and the pipe sizing on a line of sprinklers in racks shall berestricted only by hydraulic calculations and not by any piping schedule.

17.1.7.2 17.1.7.4 * In-rack sprinklers shall be located at an intersection of transverse andlongitudinal flues while not exceeding the maximum spacing rules.

17.1.7.2.1 17.1.7.4.1 Where distances between transverse flues exceed the maximum allowabledistances, sprinklers shall be installed at the intersection of the transverse and longitudinal flues,and additional sprinklers shall be installed between transverse flues to meet the maximum distancerules.

17.1.7.2.2 17.1.7.4.2 Where no transverse flues exist, in-rack sprinklers shall not exceed themaximum spacing rules.

17.1.7.3 17.2.1.5.1 and 17.3.1.9 In-Rack Sprinkler Clearance. The A minimum of 6 in. (152mm) vertical clear space shall be maintained between the sprinkler deflectors and the top of a tier ofstorage.

17.1.7.4 Sprinkler discharge shall not be obstructed by horizontal rack members.

17.1.7.5 Sprinklers installed in racks shall be located at least 3 inches from rack uprights.

17.1.7.6 17.1.7.2 When in-rack sprinklers are necessary to protect a higher hazard commoditythat occupies only a portion of the length of a rack, in-rack sprinklers shall be extended a mini-mum of 8 ft (2.4 m) or one bay, whichever is greater, in each direction along the rack on either sideof the higher hazard.

17.1.7.6.1 17.1.7.2.1 The in-rack sprinklers protecting the higher hazard shall not be required tobe extended across the aisle.

17.1.7.7 17.1.7.3 Where a storage rack, due to its length, requires less than the number ofin-rack sprinklers specified, only those in-rack sprinklers in a single rack need to be included in thecalculation.

17.2.1 Control Mode Density/Area Sprinkler Protection Criteria for Single-, Double-, andMultiple-Row Racks for Plastics Commodities Stored Up to and Including 25 ft (7.6 m)in Height, with a Clearance to Ceiling Up to and Including 10 ft (3.1 m).

17.2.1.1* Storage 5 ft (1.5 m) or Less in Height. For the storage of Group A plastics stored 5ft (1.5 m) or less in height, the sprinkler design criteria for miscellaneous storage specified inChapter 13 shall be used.

17.2.1.2 Ceiling Sprinkler Water Demand. See Section C.22.

17.2.1.2.1 17.3.1.1 Protection of Group A plastics in cartons, expanded or nonexpanded, andexposed nonexpanded, whether encapsulated or nonencapsulated, shall be permitted using controlmode density/area sprinklers in accordance with 17.3.1 17.2.1.2.

17.2.1.2.2 17.3.1.2 Protection of Exposed nonexpanded Group A plastics that are exposed andnonexpanded, whether encapsulated or nonencapsulated, shall be permitted protected only usingin-rack sprinkler arrangements that are specifically permitted to be used with exposednonexpanded plastics.

17.2.1.2.3 17.2.1.2.1 For cartoned Group A plastic commodities in cartons, encapsulated ornonencapsulated in single-, double-, and multiple- row racks, ceiling sprinkler water demand interms of density [gpm/ft2 (mm/min)] and area of operation [ft2 (m2)] shall be selected from Figure17.2.1.2.1 17.2.1.2.3 (a) through Figure 17.2.1.2.1 17.2.1.2.3 (f) or Figure 17.2.1.2.4(a) through Figure17.2.1.2.4(l).

17.2.1.2.4 17.2.1.4 * Exposed unexpanded For exposed nonexpanded Group A plastics insingle-, double-, and multiple- row racks, ceiling sprinkler water demand in terms of density [gpm/ft2 (mm/min)] and area of operation [ft 2 (m 2 )] shall be selected from Figure 17.2.1.2.4(a) throughFigure 17.2.1.2.4(l). protected with control mode density/area sprinklers shall be protected in


6 of 973 11/7/2013 10:59 AM

accordance with one of the following:

(1) Maximum 10 ft (3 m) storage in a maximum 20 ft (6.1 m) high building with ceiling sprinklersdesigned for a minimum 0.8 gpm/ft 2 (32.6 mm/min) density over 2500 ft 2 (232 m 2 ) and no in-racksprinklers required as shown in Figure 17.2.1.4(a)

(2) Maximum 10 ft (3 m) storage in a maximum 20 ft (6.1 m) high building with ceiling sprinklersdesigned for a minimum 0.45 gpm/ft 2 (18.3 mm/min) density over 2000 ft 2 (186 m ) and one level ofin-rack sprinklers required at alternate transverse flues as shown in Figure 17.2.1.4(b)

(3) Maximum 10 ft storage in a maximum 20 ft high building with ceiling sprinklers designed for aminimum 0.3 gpm/ft 2 density over 2000 ft 2 and one level of in-rack sprinklers required in everytransverse flue as shown in Figure 17.2.1.4(c)

(4) Maximum 15 ft storage in a maximum 25 ft high building with ceiling sprinklers designed for aminimum 0.45 gpm/ft 2 density over 2000 ft 2 and one level of in- rack sprinklers required atalternate transverse flues as shown in Figure 17.2.1.4(d)

(5) Maximum 15 ft storage in a maximum 25 ft high building with ceiling sprinklers designed for aminimum 0.3 gpm/ft 2 density over 2000 ft 2 and one level of in-rack sprinklers required in everytransverse flue as shown in Figure 17.2.1.4(e)

(6) Maximum 20 ft storage in a maximum 25 ft high building with ceiling sprinklers designed for aminimum 0.6 gpm/ft 2 density over 2000 ft 2 and one level of in-rack sprinklers required at alternatetransverse flues as shown in Figure 17.2.1.4(f)

(7) Maximum 20 ft storage in a maximum 25 ft high building with ceiling sprinklers designed for aminimum 0.45 gpm/ft 2 density over 2000 ft 2 and one level of in- rack sprinklers required in everytransverse flue as shown in Figure 17.2.1.4(g)

(8) Maximum 20 ft storage in a maximum 30 ft high building with ceiling sprinklers designed for aminimum 0.8 gpm/ft 2 density over 1500 ft 2 and one level of in-rack sprinklers required at alternatetransverse flues as shown in Figure 17.2.1.4(h)

(9) Maximum 20 ft storage in a maximum 30 ft high building with ceiling sprinklers designed for aminimum 0.6 gpm/ft 2 density over 1500 ft 2 and one level of in-rack sprinklers required in everytransverse flue as shown in Figure 17.2.1.4(i)

(10) Maximum 20 ft storage in a maximum 30 ft high building with ceiling sprinklers designed for aminimum 0.3 gpm/ft 2 density over 2000 ft 2 and two levels of in- rack sprinklers required in everytransverse flue as shown in Figure 17.2.1.4(j)

(11) Maximum 25 ft storage in a maximum 35 ft high building with ceiling sprinklers designed for aminimum 0.8 gpm/ft 2 density over 1500 ft 2 and one level of in-rack sprinklers required in everytransverse flue as shown in Figure 17.2.1.4(k)

(12) Maximum 25 ft storage in a maximum 35 ft high building with ceiling sprinklers designed for aminimum 0.3 gpm/ft 2 density over 2000 ft 2 and two levels of in- rack sprinklers required in everytransverse flue as shown in Figure 17.2.1.2.4(l)

17.2.1.2.5 17.2.1.2.4 * An option shall be selected from the appropriate Figure 17.2.1.2.1 3 (a)through Figure 17.2.1.2.1 3 (f) or Figure 17.2.1.2.4(a) through Figure 17.2.1.2.4(l) given the storageheight and clearance being protected. The density/area criteria at the top of each option shall beapplied to the ceiling sprinklers and the in-rack sprinklers shown in the option (if any) shall beprovided. Options that do not show multiple-row racks in the figures shall not be permitted toprotect multiple-row rack storage. Notes in each figure shall be permitted to clarify options or topresent additional options not shown in the figures.

17.2.1.2.6 17.2.1.2.2 Linear interpolation of design densities and areas of application shall bepermitted between storage heights with the same clearance to ceiling.

17.2.1.2.7 17.2.1.2.3 No interpolation between clearance to ceiling shall be permitted.

17.2.1.2.4* An option shall be selected from the appropriate Figure 17.2.1.2.1(a) through Figure17.2.1.2.1(f) given the storage height and clearance being protected. The density/area criteria at thetop of each option shall be applied to the ceiling sprinklers and the in-rack sprinklers shown in theoption (if any) shall be provided. Options that do not show multiple-row racks in the figures shallnot be permitted to protect multiple-row rack storage. Notes in each figure shall be permitted toclarify options or to present additional options not shown in the figures.

17.2.1.2.8 17.2.1.3 For storage of Group A plastics between 5 ft and 12 ft (1.5 m and 3.7 m) inheight, the installation requirements for extra hazard systems shall apply.


7 of 973 11/7/2013 10:59 AM

17.2.1.4* Exposed unexpanded Group A plastics protected with control mode density/areasprinklers shall be protected in accordance with one of the following:

(1) (1) Maximum 10 ft (3 m) storage in a maximum 20 ft (6.1 m) high building with ceilingsprinklers designed for a minimum 0.8 gpm/ft 2 (32.6 mm/min) density over 2500 ft 2 (232 m 2) and no in-rack sprinklers required as shown in Figure 17.2.1.4(a)

(2) (2) Maximum 10 ft (3 m) storage in a maximum 20 ft (6.1 m) high building with ceilingsprinklers designed for a mi

17.2.1.3 17.2.1.5 In-Rack Sprinkler Requirements Where Control Mode Density/AreaSprinklers Are Being Used at Ceiling.

17.2.1.5.1 In-Rack Sprinkler Clearance. The minimum of 6 in. (152 mm) vertical clear spaceshall be maintained between the sprinkler deflectors and the top of a tier of storage.

17.2.1.3.1 Location of In-Rack Sprinklers

17.2.1.3.1.1 For cartoned Group A plastics in single-, double-, and multiple-row racks, in-racksprinklers shall be installed in accordance with Figure 17.2.1.2.3(a) through Figure 17.2.1.2.3(f) ) orFigure 17.2.1.2.4(a) through Figure 17.2.1.2.4(l).

17.2.1.3.1.2 For exposed nonexpanded Group A plastics, in single-, double-, and multiple-rowracks, in-rack sprinklers shall be installed in accordance with Figure 17.2.1.2.4(a) through Figure17.2.1.2.4(l).

17.2.1.3.1.3 Horizontal placement of in-rack sprinklers shall be located as portrayed in theFigures.

A.17.2.1.3.1.3 The squares in the Figures of chapter 17 represents a storage cube of 4 ft to 5 ft. When the maximum horizontal spacing is 10 ft and a Figure shows horizontal in-rack sprinklers atalternate transverse flues, if the load is only 3 ft wide, in-rack sprinklers are still located at alternateflues.

17.2.1.3.1.4 Vertical placement of in-rack sprinklers shall be located based on the maximumallowed distance without regard to the number of tiers portrayed in the Figures.

A. 17.2.1.3.1.4 When the Figures in chapter 17 shows a vertical placement of in-rack sprinklers atalternate tiers, there could be as few as one tier or as many as six or seven tiers between in-racksthat are spaced 10 ft (3.1 m) apart vertically

17.2.1.3.2 Spacing of In-Rack Sprinklers

17.2.1.3.2.1 17.2.1.5.2 For cartoned Group A plastics in single-, double-, and multiple-rowracks, the spacing of in-rack sprinklers shall be installed in accordance with Figure 17.2.1.2.1 (a) (b)through Figure 17.2.1.2.1(f) or Figure 17.2.1.2.4(a) through Figure 17.2.1.2.4(l).

17.2.1.3.2.2 For exposed nonexpanded Group A plastics in single-, double-, and multiple-rowracks, the spacing of in-rack sprinklers shall be installed in accordance with Figure 17.2.1.2.4(a)through Figure 17.2.1.2.4(l).

17.2.1.3.2.3 Maximum horizontal spacing of in-rack sprinklers in single- and double-row racksshall not exceed 5 ft when located in every transverse flue and 10 ft when located in alternate flues

17.2.1.3.2.4 Maximum horizontal spacing of in-rack sprinklers in multiple-row racks shall notexceed:

(A) When across flues, 5 ft when located in every transverse flue and 10 ft when located in alternateflues

(B) When in a flue, 8 ft

17.2.1.3.2.5 Maximum vertical spacing of in-rack sprinklers shall not exceed 10 ft when portrayedin every second tier and 15 ft when portrayed at the third tier.

17.2.1.3.2.5.1 Maximum vertical distances are approximately and in-rack sprinklers shall belocated in the horizontal space nearest the maximum allowed distance.

17.2.1.5.3* In-rack sprinklers shall be located at an intersection of transverse and longitudinalflues while not exceeding the maximum spacing rules.

17.2.1.5.4 Where distances between transverse flues exceed the maximum allowable distances,sprinklers shall be installed at the intersection of the transverse and longitudinal flues, andadditional sprinklers shall be installed between transverse flues to meet the maximum distance


8 of 973 11/7/2013 10:59 AM

rules.

17.2.1.5.5 Where no transverse flues exist, in-rack sprinklers shall not exceed the maximumspacing rules.

17.2.1.5.6 In-Rack Sprinkler Water Demand of In-Rack Sprinklers

17.2.1.5.7 In-Rack Sprinkler Discharge Pressure of In-Rack Sprinklers

17.3 Protection Criteria for Rack Storage of Plastics Commodities Stored Over 25 ft(7.6 m) in Height, with a Clearance to Ceiling Up to and Including 10 ft (3.1 m).

17.3.1.3* Ceiling Sprinkler Water Demand. For cartoned Group A plastic commodities, onsingle-, double-, and multiple-row racks and exposed nonexpanded Group A plastic on multiple-rowracks, encapsulated or nonencapsulated, ceiling sprinkler water demand in terms of density[gpm/ft2 (mm/min)] and area of operation [ft2 (m2)] shall be selected from Table 17.3.1.3.

17.3.1.3.1 17.3.1.7 For protection of storage of exposed nonexpanded Group A plastics, whetherencapsulated or nonencapsulated, on single- racks or double-row racks, in-rack sprinklers shall bearranged in accordance with Figure 17.3.1.7. The highest level of in-rack sprinklers shall be notmore than 10 ft (3.1 m) below the top of storage. Where this figure is used, aisles shall be at least 4ft (1.2 m) wide and the ceiling sprinklers shall be designed for a minimum discharge density of 0.45gpm/ft2 over 2000 ft2 (18.3 mm/min over 186 m2).

17.3.1.4 In-Rack Sprinkler Requirements Where Control Mode Density/Area SprinklersAre Being Used at Ceiling.

17.3.1.4.1 Location of In-Rack Sprinklers

17.3.1.4.1.1 For protection of cartoned storage of Group A plastics, expanded or nonexpanded,whether encapsulated or nonencapsulated, on single-row racks, in-rack sprinklers shall bearranged installed in accordance with one of the options in Figure 17.3.1.4.1.1 (a) through Figure17.3.1.4.1.1 (c) or Figure 17.3.1.4.1.4. The highest level of in-rack sprinklers shall be not more than10 ft (3.1 m) below the top of storage.

17.3.1.4.1.2 17.3.1.6 Where a single-row rack of cartoned Group A plastics plastic storage ismixed with double-row racks of cartoned Group A plastics plastic storage, either Figure 17.3.1.517.3.1.4.1.3 (a), or Figure 17.3.1.5 17.3.1.4.1.3 (b), or Figure 17.3.1.4.1.4 shall be applied. permit- tedto be used in accordance with the corresponding storage height. The highest level of in-racksprinklers shall be not more than 10 ft (3.1 m) below the top of storage.

17.3.1.4.1.3 17.3.1.5 For protection of cartoned storage of Group A plastics, expanded ornonexpanded, whether encapsulated or nonencapsulated, on double-row racks, in-rack sprinklersshall be arranged installed in accordance with one of the double-row rack options in Figure 17.3.1.5.4.1.3 (a), Figure 17.3.1.5 .4.1.3 (b), or Figure 17.3.1.7 4.1.4. The highest level of in-rack sprinklersshall be not more than 10 ft (3.1 m) below the top of storage.

17.3.1.4.1.4 17.3.1.7 For protection of storage of exposed nonexpanded Group A plastics,whether encapsulated or nonencapsulated, on single- racks or double-row racks, in-rack sprinklersshall be arranged installed in accordance with Figure 17.3.1.7. 17.3.1.4.1.4 The highest level ofin-rack sprinklers shall be not more than 10 ft (3.1 m) below the top of storage. Where this figure isused, aisles shall be at least 4 ft (1.2 m) wide and the ceiling sprinklers shall be designed for aminimum discharge density of 0.45 gpm/ft 2 over 2000 ft 2 (18.3 mm/min over 186 m 2 ).

17.3.1.4.1.5 17.3.1.8 * For protection of storage of exposed nonexpanded Group A plastics,whether encapsulated or nonencapsulated, or cartoned Group A plastics, expanded ornonexpanded, whether encapsulated or nonencapsulated, on multiple-row racks, in-rack sprinklersshall be arranged installed in accordance with one of the options in Figure 17.3.1.8 4.1.5 (a) throughFigure 17.3.1.8 4.1.5 (f). The highest level of in-rack sprinklers shall be not more than 10 ft (3.1 m)below the top of storage.

17.3.1.4.1.5 17.3.1.4 The highest level of in-rack sprinklers shall be not more than 10 ft (3.1 m)below the top of storage.

17.3.1.4.1.6 Horizontal placement of in-rack sprinklers shall be located as portrayed in theFigures.

A. 17.3.1.4.1.6 The squares in the Figures of chapter 17 represents a storage cube of 4 ft to 5 ft. When the maximum horizontal spacing is 10 ft and a Figure shows horizontal in-rack sprinklers atalternate transverse flues, if the load is only 3 ft wide, in-rack sprinklers are still located at alternateflues.


9 of 973 11/7/2013 10:59 AM

17.3.1.4.1.7 Vertical placement of in-rack sprinklers shall be located based on the maximumallowed distance without regard to the number of tiers portrayed in the Figures.

A. 17.3.1.4.1.7 When the Figures in chapter 17 shows a vertical placement of in-rack sprinklers atalternate tiers, there could be as few as one tier or as many as six or seven tiers between in-racksthat are spaced 10 ft (3.1 m) apart vertically

17.3.1.9 The minimum of 6 in. (152 mm) vertical clear space shall be maintained between thein-rack sprinkler deflectors and the top of a tier of storage.

17.3.1.10* In-rack sprinklers shall be located at an intersection of transverse and longitudinalflues while not exceeding the maximum spacing rules.

17.3.1.11 Where distances between transverse flues exceed the maximum allowable distances,sprinklers shall be installed at the intersection of the transverse and longitudinal flues, andadditional sprinklers shall be installed between transverse flues to meet the maximum distancerules.

17.3.1.12 Where no transverse flues exist, in-rack sprinklers shall not exceed the maximumspacing rules.

17.3.1.4.2 Spacing of In-Rack Sprinklers

17.3.1.4.2.1 For cartoned Group A plastics on single-row racks, in-rack sprinklers shall beinstalled in accordance with one of the options in Figure 17.3.1.4.1.1(a) through Figure17.3.1.4.1.1(c) or Figure 17.3.1.4.1.4.

17.3.1.4.2.2 For cartoned Group A plastics on double-row racks, in-rack sprinklers shall beinstalled in accordance with one of the double-row rack options in Figure 17.3.1.4.1.3(a), Figure17.3.1.4.1.3(b), or Figure 17.3.1.74.1.4.

17.3.1.4.2.3 For exposed nonexpanded Group A plastics on single- or double-row racks, in-racksprinklers shall be installed in accordance with Figure 17.3.1.4.1.4

17.3.1.4.2.4 For exposed nonexpanded or cartoned Group A plastics on multiple-row racks,in-rack sprinklers shall be installed in accordance with one of the options in Figure 17.3.1.4.1.5(a)through Figure 17.3.1.4.1.5(f).

17.3.1.4.2.5 Maximum horizontal spacing of in-rack sprinklers in single- and double-row racksshall not exceed 5 ft when located in every transverse flue and 10 ft when located in alternate flues

17.3.1.4.2.6 Maximum horizontal spacing of in-rack sprinklers in multiple-row racks shall notexceed:

(A) When across flues, 5 ft when located in every transverse flue and 10 ft when located in alternateflues

(B) When in a flue, 8 ft

17.3.1.4.2.7 Maximum vertical spacing of in-rack sprinklers shall not exceed 10 ft when portrayedin every second tier and 15 ft when portrayed at the third tier.

17.3.1.4.2.7.1 Maximum vertical distances are approximately and in-rack sprinklers shall belocated in the horizontal space nearest the maximum allowed distance

17.3.1.4.3 13 In-rack Sprinkler Water Demand of In-rack Sprinklers

17.3.1. 4.4 14 In-Rack Sprinkler Discharge Pressure of In-rack Sprinkler


There is no consistency on how or where information is presented between 16.2 and 16.3 as well as between chapters 16 and chapters 17. We effectively have 4 locations addressing the same issues in 4 different formats. This was intended to be editorial except where guidance is provided in only some of the sections. These locations were guidance was copied are flagged as NOT EDITORIAL in the justification.

Used a combination of 16.2 and 16.3.1.3 for general format.Applied format of 16.2 to ch 17 (which is jumbled without being divided by sub-section numbers). Note that 16.3 references the same Figures for both location and spacing of in-rack sprinklers so did the same in ch 17 despite on first observation it seems redundant


10 of 973 11/7/2013 10:59 AM

Made cartoned and exposed more clearly addressed as separate driving variablesNeed to decide if want to use nonexpanded or unexpanded. Used nonexpanded since that seems the most prevalent

Used 17.1.7 as format and content for GENERAL section and deleted repeating within subsectionsNOT EDITORIAL No guidance in ch 17 on horizontal members not obstructing discharge or 3 from uprights so added

Changed subtitles to better focus on subject matter of sectionDeleted reference to 17.2.1.2.1(a) since no in-racks identifiedNOT EDITORIAL added introduction of coverage to 17.2 as found in 17.3NOT EDITORIAL 17.2 added that criteria for exposed can be used for cartoned (as done in 17.3) since it exceeds the cartoned criteria. NOTE Figure 17.3.1.7 for exposed include both single- and double-row racks in the title 17.2.1.4 for exposed plastics presents both ceiling and in-rack in one section whereas the other three sections separate ceiling and in-rack into individual sections. NOT EDITORIAL Other than multiple row racks in 17.3 for along the flue, there are no maximum dimensions identified for spacing in 17.2 or 17.3. The note that a square represents 4 to 5 ft is itself not adequate since it also says loads can be from 18 inches to 10 ft. Added to use 5 ft max distance between flues in text based on the correlation of the 16.3 maximum spacing rules and the squares in its Figures. Could show this on the Figures instead of textNOT EDITORIAL Horizontal placement of in-racks shall be located in the flues as shown in the Figures to address when loads are less than 4 or 5 ftAdded text that vertical is based on distance and for short loads can be at 6 or 7 tiers even though the Figure may show 3 tiers (as per note in Figures). NOT EDITORIAL Note that 16.3 indirectly allows additionally transverse flues for narrow loads. Used a more conservative approach for ch 17 since narrow loads are not that common and do not believe the intent of the TC on 16.3 is to allow 3 or 4 transverse flues when the Figure shows alternate flues. Should clarify. NOT EDITORIAL 16.3 states vertical is approximate and located nearest the vertical interval but did not say that in 17.2 or 17.3. I added it is approximate.

Renumbered Figures 17.2.1.4(a) through (k) to 17.2.1.2.4(a) through (l)Renumbered Figures 17.2.1.2.1(a) through Figure 17.2.1.2.1(f) to 17.2.1.2.3(a) through (f)Renumbered Figure 17.3.1.4(a) through (c) to 17.3.1.4.1.1(a) through (c)Renumbered Figures 17.3.1.5(a) and (b) as 17.3.1.4.1.3(a) and (b)Renumbered Figure 17.3.1.7 to 17.3.1.4.1.4Renumbered Figure 17.3.1.8(a) through Figure 17.3.1.8(f) to 17.3.1.4.1.5 (a) thru (f).

Related Public Inputs for This Document

Related Input RelationshipPublic Input No. 106-NFPA 13-2013 [Global Input] Coordinated reformating of chapters 16 and 17


Submitter Full Name: Roland HugginsOrganization: American Fire Sprinkler AssociStreet Address:City:State:Zip:Submittal Date: Tue Mar 12 14:12:18 EDT 2013

Committee Statement

Resolution: FR-317-NFPA 13-2013 The proposed consolidation increased requirements for some storageheights/arrangements without sufficient data to justify the change. The committee did see thejustification to eliminate redundant requirements that could be moved to the general section.


11 of 973 11/7/2013 10:59 AM

Statement: Revision to revise 17.1.7.4 as follows and delete section 17.1.10.2.2 because it is redundant withsection 17.1.7.4, deleting redundant sections to 17.1.7.4 and add 17.1.7.4.3. The proposedconsolidation increased requirements for some storage heights/arrangements without sufficient datato justify the change. The committee did see the justification to eliminate redundant requirements thatcould be moved to the general section.





12 of 973 11/7/2013 10:59 AM


Chapter 11

11.1.5 Water Supplies.

11.1.5.1 The minimum water supply shall be available for the minimum duration specified inChapter 11 or Section 12.7.1.

11.2.3.1.4 Restrictions. When either the density/area method or room design method is used,the following shall apply:

(1)*For areas of sprinkler operation less than 1500 ft 2 (139 m 2 ) used for light and ordinary hazardoccupancies, the density for 1500 ft 2 (139 m 2 ) shall be used.

(2) For areas of sprinkler operation less than 2500 ft 2 (232 m 2 ) for extra hazard occupancies, thedensity for 2500 ft 2 (232 m 2 ) shall be used.

(3)*Unless the requirements of 11.2.3.1.4(4) are met for buildings having unsprinklered combustibleconcealed spaces, as described in 8.15.1.2 and 8.15.6, the minimum area of sprinkler operation forthat portion of the building shall be 3000 ft 2 (279 m 2 ). The design area of 3000 ft 2 (279 m 2 ) shallbe applied only to the sprinkler system or portions of the sprinkler system that are adjacent to thequalifying combustible concealed space. The term adjacent shall apply to any sprinkler systemprotecting a space above, below, or next to the qualifying concealed space except where a barrierwith a fire resistance rating at least equivalent to the water supply duration completely separatesthe concealed space from the sprinklered area. The following unsprinklered concealed spaces shallnot require a minimum area of sprinkler operation of 3000 ft 2 (279 m 2 ):

(a) Noncombustible and limited-combustible concealed spaces with minimal combustibleloading having no access. The space shall be considered a concealed space even withsmall openings such as those used as return air for a plenum.

(b) Noncombustible and limited-combustible concealed spaces with limited access and notpermitting occupancy or storage of combustibles. The space shall be considered aconcealed space even with small openings such as those used as return air for a plenum.

(c) Combustible concealed spaces filled entirely with noncombustible insulation.

(d)*Light or ordinary hazard occupancies where noncombustible or limited-combustibleceilings are directly at- attached to the bottom of solid wood joists or solid limited-combustible construction or noncombustible construction so as to create enclosed joistspaces 160 ft 3 (4.5 m 3 ) or less in volume, including space below insulation that is laiddirectly on top or within the ceiling joists in an otherwise sprinklered concealed space.

(e) Concealed spaces where rigid materials are used and the exposed surfaces have a flamespread index of 25 or less and the materials have been demonstrated to not propagate firemore than 10.5 ft (3.2 m) when tested in accordance with ASTM E 84, Standard Test Methodof Sur- face Burning Characteristics of Building Materials, or ANSI/UL 723, Standard for Testfor Surface Burning Characteristics of Building Materials, extended for an additional 20minutes in the form in which they are installed in the space.

(f) Concealed spaces in which the exposed materials are constructed entirely offire-retardant treated wood as defined by NFPA 703.

(g) Concealed spaces over isolated small rooms not exceeding 55 ft 2 (5.1 m 2 ) in area.

(h) Vertical pipe chases under 10 ft 2 (0.93 m 2 ), provided that in multifloor buildings thechases are firestopped at each floor using materials equivalent to the floor construction,and where such pipe chases shall contain no sources of ignition, piping shall benoncombustible, and pipe penetrations at each floor shall be properly sealed.

(i) Exterior columns under 10 ft 2 (0.93 m 2 ) in area formed by studs or wood joists,supporting exterior canopies that are fully protected with a sprinkler system.


13 of 973 11/7/2013 10:59 AM

(j)*Light or ordinary hazard occupancies where noncombustible or limited-combustibleceilings are attached to the bottom of composite wood joists either directly or on to metalchannels not exceeding 1 in. (25.4 mm) in depth, provided the adjacent joist channels arefirestopped into volumes not exceeding 160 ft 3 (4.5 m 3 ) using materials equivalent to 1 ? 2in. (12.7 mm) gypsum board and at least 3 1 ? 2 in. (90 mm) of batt insulation is installed atthe bottom of the joist channels when the ceiling is attached utilizing metal channels.

Chapter 12

12.1.4* High Volume Low Speed (HVLS) Fans.

12.1.4.1 The installation of HVLS fans in buildings equipped with sprinklers, including ESFRsprinklers, shall comply with the following:

(1) (1) The maximum fan diameter shall be 24 ft (7.3 m).

(2) (2) The HVLS fan shall be centered approximately between

four adjacent sprinklers.

(1) (3) The vertical clearance from the HVLS fan to sprinkler

deflector shall be a minimum of 3 ft (0.9 m).

(1) (4) All HVLS fans shall be interlocked to shut down immediately upon receiving a waterflowsignal from the alarm

system in accordance with the requirements of NFPA 72.

12.3* Adjacent Hazards or Design Methods. For buildings with two or more adjacent hazardsor design methods, the following shall apply:

(1) (1) Where areas are not physically separated by a barrier or partition capable of delaying heatfrom a fire in one area from fusing sprinklers in the adjacent area, the required sprinklerprotection for the more demanding design basis shall extend 15 ft (4.6 m) beyond its perimeter.

(2) (2) The requirements of 12.3(1) shall not apply where the areas are separated by a barrierpartition that is capable of preventing heat from a fire in one area from fusing sprinklers in theadjacent area.

(3) (3) The requirements of 12.3(1) shall not apply to the exten- sion of more demanding criteriafrom an upper ceiling level to beneath a lower ceiling level where the difference in heightbetween the ceiling levels is at least 2 ft (0.6 m).

12.3 12.4* Wet Pipe Systems.

12.4 12.5 Dry Pipe and Preaction Systems.

12.5 12.6* Storage Applications.

12.6 12.7 Discharge Considerations.

12.6.1 12.7.1 The water supply for sprinklers only shall be determined either from the density/arearequirements of Chapter 12 through Chapter 20 or shall be based upon the room design method inaccordance with Section 12.10, at the discretion of the designer.

12.7.2* Systems with Multiple Hazard Classifications. For systems with multiple hazardclassifications, the hose stream allowance and water supply duration shall be in accordance withSection 12.8 as well as one of the following:

(1) The water supply requirements for the highest hazard classification within the systemshall be used.

(2) The water supply requirements for each individual hazard classification shall be used inthe calculations for the design area for that hazard.

(3)*For systems with multiple hazard classifications where the higher classification only lieswithin single rooms less than or equal to 400 ft 2 (37.2 m 2 ) in area with no such roomsadjacent, the water supply requirements for the principal occupancy shall be used for theremainder of the system.

12.6.2 12.7.3 The calculations shall satisfy any single point on appropriate density/area curves.

12.7.4 The minimum water supply requirements shall be determined by adding the hose stream


14 of 973 11/7/2013 10:59 AM

allowance from Section 12.8 to the water supply for sprinklers as determined by Chapter 12 throughChapter 20.

12.7.5 The minimum water supply requirements determined from 12.7.4 shall be available for theminimum duration specified in Section 12.8.

12.7.6 Total system water supply requirements shall be determined in accordance with thehydraulic calculation procedures of Chapter 23.

11.1.3.1 12.7.6.1 When using the density/area method, the design area shall meet therequirements of 23.4.4.1.1.1.

11.1.3.2 12.7.6.2 When using CMSA, the design area shall meet the requirements of 23.4.4.2.1.

11.1.3.3 12.7.6.3 When using ESFR sprinklers, the design area shall consist of the mosthydraulically demanding area of 12 sprinklers, consisting of four sprinklers on each of three branchlines, unless other specific numbers of design sprinklers are required in other sections of thisstandard.

12.6.3 12.7.7 Multiple Adjustments.

12.6.3.1 12.7.7.1 Where multiple adjustments to the area of operation are required to be made,these adjustments shall be compounded based on the area of operation originally selected.

12.6.3.2 12.7.7.2 If the building has unsprinklered combustible concealed spaces, the rules ofSection 12.9 shall be applied after all other modifications have been made.

12.6.3.3 12.7.7.3 The minimum design density for any sprinkler system installed in a storageoccupancy shall be not less than 0.15 gpm/ft2 (6.1 mm/min) after all adjustments are made.

12.7 12.8 Hose Stream Allowance and Water Supply Duration.

12.8.1* Tanks shall be sized to supply the equipment that they serve.

12.8.2* Pumps shall be sized to supply the equipment that they serve.

12.8.3 Water allowance for outside hose shall be added to the sprinkler requirement at theconnection to the city main or a yard hydrant, whichever is closer to the system riser.

12.8.4 Where inside hose connections are planned or are required, the following shall apply:

(1) A total water allowance of 50 gpm (189 L/min) for a single hose connection installation shall beadded to the sprinkler requirements.

(2) A total water allowance of 100 gpm (378 L/min) for a multiple hose connection installation shallbe added to the sprinkler requirements.

(3) The water allowance shall be added in 50 gpm (189 L/min) increments beginning at the mostremote hose connection, with each increment added at the pressure required by the sprinklersystem design at that point.

12.8.5 When hose valves for fire department use are attached to wet pipe sprinkler system risers inaccordance with 8.17.5.2, the following shall apply:

(1) The water supply shall not be required to be added to standpipe demand as determinedfrom NFPA 14.

(2) Where the combined sprinkler system demand and hose stream allowance of Chapter 12and Chapters 14 through 20 exceeds the requirements of NFPA 14, this higher de- mandshall be used.

(3) Forpartiallysprinkleredbuildings,thesprinklerdemand, not including hose streamallowance, as indicated in Chapter 12 and Chapters 14 through 20 shall be added to therequirements given in NFPA 14.

12.7.1 12.8.6 Hydraulically Designed Occupancy Hazard Fire Control Sprinkler System.

12.7.1.1 12.8.6.1 Unless indicated otherwise, the minimum water supply requirements for ahydraulically designed occupancy hazard fire control sprinkler system shall be determined byadding the hose stream allowance from Table 12.8.6.1 to the water supply for sprinklers.

12.7.1.2 12.8.6.2 Unless indicated otherwise, the supply determined in accordance with 12.8.6.1shall be available for the minimum duration specified in Table 12.8.6.1.

Table 12.7.1.1 12.8.6.1 Hose Stream Allowance and Water Supply Duration

11.1.8 12.9 Restrictions. Unsprinklered Combustible Concealed Spaces


15 of 973 11/7/2013 10:59 AM

11.1.8.1 12.9.1* When using the density/area method, unless the requirements of 11.1.8.2 12.9.2are met for buildings having unsprinklered combustible concealed spaces as described in 8.15.1.2and 8.15.6, the minimum area of sprinkler operation for that portion of the building shall be 3000 ft2(279 m2).

11.1.8.1.1 12.9.1.1 The design area of 3000 ft2 (279 m2) shall be applied only to the sprinklersystem or portions of the sprinkler system that are adjacent to the qualifying combustibleconcealed space.

11.1.8.1.2 12.9.1.2 The term adjacent shall apply to any sprinkler system protecting a spaceabove, below, or next to the qualifying concealed space except where a barrier with a fire resistancerating at least equivalent to the water supply duration completely separates the concealed spacefrom the sprinklered area.

11.1.8.2 12.9.2 The following unsprinklered combustible concealed spaces shall not require aminimum design area of sprinkler operation of 3000 ft2 (279 m2):

(1) Noncombustible and limited-combustible concealed spaces with minimal combustibleloading having no access. The space shall be considered a concealed space even withsmall openings such as those used as return air for a plenum.

(2) Noncombustible and limited-combustible concealed spaces with limited access and notpermitting occupancy or storage of combustibles. The space shall be considered aconcealed space even with small openings such as those used as return air for a plenum.

(3) Combustible concealed spaces filled entirely with noncombustible insulation.

(4)*Light or ordinary hazard occupancies where noncombustible or limited-combustibleceilings are directly attached to the bottom of solid wood joists so as to create enclosedjoist spaces 160 ft3 (4.5 m3) or less in volume, including space below insulation that is laiddirectly on top or within the ceiling joists in an otherwise sprinklered concealed space.

(5) Concealed spaces where rigid materials are used and the exposed surfaces have a flamespread index of 25 or less and the materials have been demonstrated to not propagate firemore than 10.5 ft (3.2 m) when tested in accordance with ASTM E 84, Standard Test Methodfor Surface Burn- ing Characteristics of Building Materials, or ANSI/UL 723, Standard forTest for Surface Burning Characteristics of Building Materials, extended for an additional 20minutes in the form in which they are installed in the space.

(6) Concealed spaces in which the exposed materials are constructed entirely of fireretardanttreated wood as defined by NFPA 703.

(7) Concealed spaces over isolated small rooms not exceeding 55 ft2 (5.1 m2) in area.

(8) Vertical pipe chases under 10 ft2 (0.93 m2), provided that in multifloor buildings thechases are firestopped at each floor using materials equivalent to the floor construction.Such pipe chases shall contain no sources of ignition, piping shall be noncombustible, andpipe penetrations at each floor shall be properly sealed.

(9) Exterior columns under 10 ft2 (0.93 m2) in area formed by studs or wood joists,supporting exterior canopies that are fully protected with a sprinkler system.

(10)*Light or ordinary hazard occupancies where noncombustible or limited-combustibleceilings are attached to the bottom of composite wood joists either directly or on to metalchannels not exceeding 1 in. (25.4 mm) in depth, provided the adjacent joist channels arefirestopped into volumes not exceeding 160 ft3 (4.5 m3) using materials equivalent to 1?2 in.(12.7 mm) gypsum board and at least 31?2 in. (90 mm) of batt insulation is installed at thebottom of the joist channels when the ceiling is attached utilizing metal channels.

12.8 12.10 Room Design Method.

12.9 12.11* High-Expansion Foam Systems.

12.10 12.12* Protection of Idle Pallets.


Section 11.1 is a general section for all sprinkler system as stated in 11.1 so its unnecessary to repeat guidance in ch 1212.1.4 is already addressed by 11.1.7


16 of 973 11/7/2013 10:59 AM

12.3 addressed by 11.1.212.7.2 addressed by 11.1.6.112.7.4 addressed by 11.1.4.212.7.5 addressed by modified 11.1.5.112.7.6 addressed by 11.1.3Moved 12.7.6.1 through 12.7.6.3 to chapter 11.1 since a general requirement12.8.1 to 12.8.5 addressed by 11.1.5.2 / 11.1.5.3 / 11.1.6.2 / 11.1.6.3 /11.1.6.412.8.6 This is general information for all density/area systems so belongs in 11.1. Moved to 11.1 but changed the title. In section 11.2 where this criteria originated there is other criteria so it needed a broader title. Since its not really a restriction and it seems a better title is the topic of interest. Also deleted 11.2.3.1.4(3) and (4). If this change is not accepted need to delete 12.9.2 (4) & (10) since they address light and ordinary hazard which is not applicable to the storage chapters.If criteria is in 11.2 and chap 12, I left it asis except for restrictions. Consider moving room design to 11.1


Submitter Full Name: Roland HugginsOrganization: American Fire Sprinkler AssociStreet Address:City:State:Zip:Submittal Date: Wed Mar 13 15:10:52 EDT 2013

Committee Statement

Resolution: Chapter 12 is formatted to be a general section to the storage chapters, moving sections to chapter11 may confuse the users when applying storage applications.





17 of 973 11/7/2013 10:59 AM


Tables 17.2.1.4(a) through Table 17.2..1.4(l). Change the SRR to DRR for the rack shown against thewall.


By definition, a single row rack does not have a flue and the space against the wall is a flue. This correlates with how this issue is addressed in ch 16


Related Input RelationshipPublic Input No. 86-NFPA 13-2013 [New Section after A.3.9.4.4]


Submitter Full Name: Roland HugginsOrganization: American Fire Sprinkler AssociStreet Address:City:State:Zip:Submittal Date: Thu Mar 14 18:11:03 EDT 2013

Committee Statement

Resolution: The racks shown against the wall are SRR, the protection is allowed to be located in the flue spacewhen the distance to the wall is 24 inches or less making the space a longitudinal flue and therequired in rack sprinklers can be located in that space.





18 of 973 11/7/2013 10:59 AM


23.7 23.5 Pipe Schedules

23.5 23.6 Deluge Systems

23.6 23.7* Exposure Protection Sprinkler System

23.4.5 23.8 In-Rack Sprinklers

23.4.6 23.9 Hose Allowance


23.6 and 23.7 are both hydraulically calculated systems so are more easy found if they immediately follow the hydraulic calculation procedures.23.8 and 23.9 are part of the hydraulic calculation procedure so should be located in the section on hydraulic calculation procedures.

Pipe schedule criteria should come after the hydraulic related material



Committee Statement

Resolution: FR-258-NFPA 13-2013Statement: 23.6 and 23.7 are both hydraulically calculated systems so are more easy found if they immediately

follow the hydraulic calculation procedures. 23.8 and 23.9 are part of the hydraulic calculationprocedure so should be located in the section on hydraulic calculation procedures. Pipe schedulecriteria should come after the hydraulic related material





19 of 973 11/7/2013 10:59 AM


16.3.1.1* For single- and double-row racks, the water demand for nonencapsulatedstorage without solid shelves separated by aisles at least 4 ft (1.2 m) wide and withnot more than a clearance to ceiling up to and including 10 ft (3.1 m) between thetop of storage and the sprinklers shall be in accordance with Table 16.3.1.1.

16.3.1.2 For multiple-row racks, the water demand for nonencapsulated storagewithout solid shelves separated by aisles at least 4 ft (1.2 m) wide and with not morethan a clearance to ceiling up to and including 10 ft (3.1 m) between the top ofstorage and the sprinklers shall be in accordance with Table 16.3.1.2.

17.2.1 Control Mode Density/Area Sprinkler Protection Criteria for Single-,Double-, and Multiple-Row Racks for Plastics Commodities Stored Up toand Including 25 ft (7.6 m) in Height, with a Clearance to Ceiling Up toand Including 10 ft (3.1 m).

17.2.1.2.1 For Group A plastic commodities in cartons, encapsulated ornonencapsulated in single-, double-, and multiple- row racks and with a clearance toceiling up to and including 10 ft. (3.1 m), ceiling sprinkler water demand in terms ofdensity [gpm/ft2 (mm/min)] and area of operation [ft2 (m2)] shall be selected fromFigure 17.2.1.2.1(a) through Figure 17.2.1.2.1(f).

17.3.1.1 Protection of Group A plastics in cartons, expanded or nonexpanded, whetherencapsulated or nonencapsulated racks and with a clearance to ceiling up to and including10 ft. (3.1 m), shall be permitted using control mode density/area sprinklers in accordancewith 17.3.1.

17.3.1.2 Protection of Group A plastics that are exposed and nonexpanded, whetherencapsulated or nonencapsulated racks and with a clearance to ceiling up to and including10 ft. (3.1 m), shall be permitted only using in-rack sprinkler arrangements that arespecifically permitted to be used with exposed nonexpanded plastics.


Editorial. No consistency on how the clearance to ceiling is identified. 16.2 uses "between top of storage and sprinklers", 17.2 identifies the requirement only in the title, and 17.3 does not state it at all. Used the same phrase from 17.2 for consistency. If PI 13-109 (which adds exposed expanded plastics to 17.2.1.2.1) is not accepted, will need to add to 17.2.1.4.


Submitter Full Name: Roland HugginsOrganization: American Fire Sprinkler AssociStreet Address:City:State:Zip:Submittal Date: Fri Mar 15 13:10:12 EDT 2013

Committee Statement

Resolution: FR-182-NFPA 13-2013


20 of 973 11/7/2013 10:59 AM

Statement: No consistency on how the clearance to ceiling is identified. 16.2 uses "between top of storage andsprinklers", 17.2 identifies the requirement only in the title, and 17.3 does not state it at all. (Used thesame phrase from 17.2 for consistency)





21 of 973 11/7/2013 10:59 AM


17.2 Protection Criteria for Rack Storage of Plastics Commodities Stored Up to andIncluding 25 ft (7.6 m) in Height.

17.2.1 Control Mode Density/Area Sprinkler Protection Criteria for Single-, Double-, andMultiple-Row Racks for Plastics Commodities Stored Up to and Including 25 ft (7.6 m)in Height, with a Clearance to Ceiling Up to and Including 10 ft (3.1 m).

17.3 Protection Criteria for Rack Storage of Plastics Commodities Stored Over 25 ft(7.6 m) in Height.

17.3.1 Control Mode Density/Area Sprinkler Protection Criteria for Rack Storage ofPlastics Commodities Stored Over 25 ft (7.6 m) in Height for Single-, Double-, andMultiple-Row Racks.


Editorial. There is no value in repeating the text from the primary title in a subtitle immediately after it.



Committee Statement

Resolution: The repeated height in the titles adds clarity of the section and is consistent with other storagechapters. The repeated titles in these tables does not create a conflict in the standard.





22 of 973 11/7/2013 10:59 AM


In Figures 17.3.1.8(a), (c), and (e), replace the double-row racks with multiple-row racks as portrayedin Figures 17.3.1.8(b) and (d).


Editorial. Section 17.3.1.8 applies only to multiple-row racks.



Committee Statement

Resolution: FR-318-NFPA 13-2013Statement: Editorial. Section 17.3.1.8 applies only to multiple-row racks. The elimination of the longitudinal flues

creates consistency between all 6 of the figures in this section.





23 of 973 11/7/2013 10:59 AM


Divide the first column for Tables 18.4(a), 18.4(c), and 18.4(d) as follows:

Table 18.4(a) Protection Criteria for Rubber Tire Storage Using Control ModeDensity/Area Sprinklers

Piling Method Storage Arrangement Piling Method

(1) On-floor storage Pyramid piles, on-side(a) Pyramid piles, on-side Other arrangements such thatno horizontal

channels are formed (see Note2

(b) Other arrangements such that no horizontal

channels are formed (see Note 2)

____________________________________________________________________

(2) On-floor storage Tires, on-tread

Tires, on-tread

___________________________________________________________________

(3) Palletized portable rack storage On-side or on-tread

On-side or on-tread

____________________________________________________________________

(4) Palletized portable rack storage, on-side on-side

____________________________________________________________________

(5) Open portable rack storage, on-side or on-tread on-side or on-tread

____________________________________________________________________

(6) Open portable rack storage, laced laced

____________________________________________________________________

(7) Single-, double-, and multiple-row fixed rack storage on on-side, or on-tread

pallets, on-side, or on-tread without shelves

____________________________________________________________________

(8) Single-, double-, and multiple-row fixed rack on-side or on-tread

storage without pallets or shelves, on-side or on-tread

Table 18.4(c) Control Mode Specific Application (CMSA) Protection for Rubber Tires


Rubber tire storage, on-side or on-tread, in on-side or on-tread

palletized portable racks, or open portable

racks, or fixed racks without solid shelves

Table 18.4(d) Early Suppression Fast-Response (ESFR) Sprinklers for Protection ofRubber Tires (see Note 1)


Rubber tire storage, on-side or on-tread, in on-side or on-tread

palletized portable racks, open portable racks,

or fixed racks without solid shelves


24 of 973 11/7/2013 10:59 AM


There are two issues with the current requirement. The current title says Piling Method whereas the column also contains storage arrangements. This change copies the format in the other chapters. The second issue is that the current format is misleading. For instance, Table 18.4(a) line (6) says ..storage on pallets, on-side, or on-tread... That grammatically means it is three variables with on-pallets being one of the variables instead of it being a common storage arrangement applicable to the two piling methods.


Submitter Full Name: Roland HugginsOrganization: American Fire Sprinkler AssociStreet Address:City:State:Zip:Submittal Date: Mon Mar 18 18:47:38 EDT 2013

Committee Statement

Resolution: The suggested revisions to the table do not add additional clarity. There is no technical change to thissection made by this proposal .





25 of 973 11/7/2013 10:59 AM


24.1.3 Size of Fire Mains.

24.1.3.1 Except as provided in 24.1.3.2, For mains that supply a sprinkler system and hydrants, nopipe smaller than 6 in. (150 mm) in diameter shall be installed as a private service main.

24.1.3.2 For mains that do not supply hydrants, sizes smaller than 6 in. (150 mm) shall bepermitted to be used subject to the following restrictions:

(1) The main supplies only automatic sprinkler systems, open sprinkler systems, waterspray fixed systems, foam systems, or Class II standpipe systems.

(2) Hydraulic calculations show that the main will supply the total demand at theappropriate pressure. Systems that are not hydraulically calculated shall have a main atleast as large as the system riser.

24.1.3.2 24.1.3.2(1) The When the main supplies only automatic sprinkler systems, opensprinkler systems, water spray fixed systems, foam systems, or Class II standpipe systems, anysize pipe is allowed to be used.

24.1.3.3 * For a single combined main that supplies both facility demands and fire systemdemand, the following shall apply:

(1) When the pipe diameter is 6 in. (150 mm) or larger, the hydraulic calculations are notrequired to include the facility demand.

(2) When the pipe diameter is 4 in. (100 mm) and the facility demand is no more than 100gpm or the equivalent length of the main is no more than 100 ft, the hydraulic calculationsare not required to include the facility demand.

(3) 24.1.3.3* When a single main the pipe diameter is less than 4 in. (100 mm) indiameter serves both domestic and fire systems, the domestic demand shall be added to thehydraulic calculations shall include the facility demand. for the fire system at the point ofconnection unless provisions have been made to isolate the domestic demand.

24.1.3.4 24.1.3.2(2) Hydraulic calculations show shall verify that the main will supply the totaldemand at the appropriate pressure.

24.1.3.4.1 24.1.3.3(3) The domestic If required by 24.1.3.3, the facility demand shall be added tothe hydraulic calculations for the fire system at the point of connection unless provisions havebeen made to isolate the domestic facility demand.

24.1.3.5 24.1.3.2(2) Systems Fire systems that are not hydraulically calculated shall have a mainat least as large as the fire system riser.

A.24.1.3.3 For typical combined domestic/fire sprinkler demands, systems with 4 in. (100 mm)pipe or larger typically do not need to include the domestic demand in the calculations because it issuch a small fraction of the total flow that it does not make a significant difference in the results.But for situations where 4 in. (100 mm) pipe is used for the combined domestic facility/fire sprinklersystems and the domestic with a larger facility demand or longer main lengths is considerable, thenthe domestic demand should be is included in the calculations. Generally, pipe that is 6 in. or largercan carry combined domestic facility /fire protection demands demand without any considerationfor domestic facility demand being necessary.


The current 24.1.3.3 creates a conflict with 24.1.3.1 that requires 6 inch pipe for all systems except when the main supplies only fire systems. As such, a combined main must be 6 inches. Additionally A.24.1.3.3 conflicts with 24.1.3.3 and does so in a very imprecise manner making enforcement chaotic. The body says that mains less than 4 inches shall include the domestic demand in the hydraulic calculation. The natural interpretation is that mains 4


26 of 973 11/7/2013 10:59 AM

inches and larger do not include the domestic demand. But the annex says the domestic demand should be included if it is considerable. The ambiguity of this phrase creates significant inconsistencies in application. Whether the domestic demand negatively impacts the friction loss is not just a function of the volume of the domestic demand but depends on both the system demand and the length of the main. The values proposed for these variables are conservative especially considering its a combination of all three variables that defines the impact. Attempting to define a more precise method would be unnecessarily complicated.

A final point is that domestic demand, is defined by Merriam-Webster as being of or relating to the household or the family. Thus it is just water for drinking, cooking, bathing, drinking etc but does not address other common uses such as industrial or process needs within a building. Changing the reference to facility demands is more comprehensive.



Committee Statement

Resolution: The domestic demand is the potable water supply as identified in the plumbing code. The technicalcommittee has formed a task group to review this.





27 of 973 11/7/2013 10:59 AM


1. Table 23.4.4.7.1 HazenWilliams C Values

Pipe or Tube C Value*

Unlined cast or ductile iron 100

Black steel (dry systems including preaction) 100

Black steel (wet systems including deluge) 120

Galvanized steel (dry systems including preaction) 100

Galvanized steel (All wet systems including deluge) 120

Plastic (listed) all 150

Cement-lined cast- or ductile iron 140

Copper tube or stainless steel 150

Asbestos cement 140

Concrete 140


There is no evidence that galvanized pipe does not provide a hydraulic benefit. It is inappropriate to lower the C-Value simply to discourage the use of galvanized pipe due to accelerated local corrosion. Such corrosion does not reduce the hydraulic benefit as determined by the overall pipe condition. Local corrosion is a problem for galvanized pipe but the decision to allow the use of galvanized is to be made by the Installation TC.


Related Input RelationshipPublic Input No. 111-NFPA 13-2013 [New Section after 7.2.6.8.3]


Submitter Full Name: Roland HugginsOrganization: American Fire

Documents

Public Input No. 106-NFPA 13-2013 [ Global Input ]