12 of 34 11/14/2016 9:30 AM. Committee Input No. 921-NFPA [ Section No ]

Transcription

1 12 of 34 11/14/2016 9:30 AM Committee Input No. 921-NFPA [ Section No ]

2 13 of 34 11/14/2016 9:30 AM

3 14 of 34 11/14/2016 9:30 AM The protection criteria shall be selected from Table and Figure Table Discharge Criteria for Miscellaneous Srage Up 12 ft (3.7 m) in Height Commodity Type of Srage Total Maximum Srage Design Combined Ceiling Height Curve Inside and Height Outside Figure Inside Hose Hose ft m ft m Note gpm L/min gpm L/min Class I Class IV Class I Class II Solid-piled, palletized, bin box, shelf, single-, >10 >3.0 OH1 OH1 Class II double-, multiple-row rack, and OH2 Class III back--back shelf OH2 Class IV srage OH2 Class IV Class IV Class IV Palletized, bin box, shelf, and solid-piled Single-, double-, multiple-row rack and back--back shelf srage Rack >10 >10 >10 >3.0 >3.0 > OH EH1 OH2 Group A 1 level of in-rack Duration (minutes) Plastic P lastic Srage OH Carned Unexpanded and expanded Solid-piled, palletized, bin box, shelf, single-, double-, multiple-row rack, and back--back shelf srage >5 10 >5 10 > > EH EH >10 > EH2 5 19

4 15 of 34 11/14/2016 9:30 AM + 1 level of in-rack Exposed + Solid-piled, palletized, bin box, shelf, and back--back shelf srage Single-, double-, multiple-row rack >10 >10 >3.0 > Unexpanded and expanded Unexpanded Expanded Solid-piled, palletized, bin box, shelf, single-, double-, multiple-row rack, and back--back shelf srage Solid-piled, palletized, bin box, shelf, and back--back shelf srage Solid-piled, palletized, bin box, shelf, single-, double-, multiple-row rack, and back--back shelf srage Solid-piled, palletized, bin box, shelf, single-, double-, multiple-row rack, and back--back shelf srage Single-, double-, multiple-row rack 1 level of in-rack 5 Unexpanded and expanded + 1 level of in-rack Tires 5 Solid-piled, palletized, bin box, shelf, and back--back shelf srage Single-, double-, multiple-row rack On floor, on side 19 >10 >10 > EH OH OH2 >5 8 >5 10 >5 10 >5 10 > > > > >3.0 >3.0 > On floor, on tread, or on side Tire Srage >5 > EH EH EH OH EH EH OH EH OH

5 16 of 34 11/14/2016 9:30 AM + Single-, double-, or multiple-row racks on tread or on side Single-row rack, portable, on tread or on side Single-row rack, fixed, on tread or on side 1 level of in-rack 5 Heavyweight and mediumweight 19 On end OH2 >5 >5 >5 >1.5 >1.5 >1.5 Rolled Paper Srage OH2 Tissue and lightweight On end EH EH EH OH Figure Miscellaneous Srage Up 12 ft (3.7 m) in Height Design Curves (see Table ). Submitter Information Verification Submitter Full Name: AUT-SSD Organization: National Fire Protection Assoc Street Address: City: State: Zip: Submittal Date: Tue Sep 20 15:12:47 EDT 2016 Committee Statement Committee Statement: This proposal is offered provide another option for the protection of Class IV commodities sred on racks a maximum height of 12 ft. Since an OH2 design with 1 level of in-rack sprinklers is adequate for Miscellaneous Srage of Group A plastic commodities and rubber tires on racks 12 ft, it should be equally acceptable for the srage of Class IV products. The Committee Statement FR No. 295 suggested that guidance for Class I IV commodities should be included, so this proposal also offers in-rack spacing for Class IV commodities as well. Class I III is not offered, since as per Table , with an OH2 design criteria in-rack sprinklers would not be needed srage 12 ft.

6 17 of 34 11/14/2016 9:30 AM Response Message: Public Input No. 513-NFPA [Section No ]

7 18 of 34 11/14/2016 9:30 AM Committee Input No. 929-NFPA [ Section No ] Horizontal The horizontal spacing of in-rack sprinklers shall not exceed 8 ft (2.4 m). be as follows: (1) 10 ft (3.0 m) maximum for Class IV Commodities (2) 10 ft (3.0 m) maximum for Group A Plastic Commodities (3) 8 ft (2.4 m) maximum for rubber tires Submitter Information Verification Submitter Full Name: AUT-SSD Organization: [ Not Specified ] Street Address: City: State: Zip: Submittal Date: Wed Nov 02 16:08:14 EDT 2016 Committee Statement Committee Statement: This proposal is offered provide better coordination between the in-rack spacing requirements of Chapter 13 with that of Chapters During the previous cycle, when the current text of was entered via PI No. 330 and FR No. 295, the substantiation said that the maximum spacing of 8 ft was prescribed in Chapters 17 and 18. However, Chapter 17 only specifies 8 ft spacing across the width for multiple row racks, whereas for sprinklers in the longitudinal flue spaces, Figure (b), for srage up 15 ft in height (beyond the height limitations of Chapter 13) indicates sprinklers ever two srage cubes, which represents a maximum spacing of 10 ft (3.0 m). Response Message: The Committee Statement FR No. 295 suggested that guidance for Class I--IV commodities should be included, so this proposal also offers in-rack spacing for Class IV commodities as well. Class I--III is not offered, since as per Table , with an OH2 design criteria in-rack sprinklers would not be needed srage 12 ft. Public Input No. 514-NFPA [Section No ]

8 19 of 34 11/14/2016 9:30 AM Committee Input No. 931-NFPA [ New Section after ]

9 20 of 34 11/14/2016 9:30 AM Alternative Protection Option Alternative Protection Option 2. The protection of Group A plastic commodities requiring a greater level of protection than is available from the overhead sprinkler system shall be permitted be protected in accordance with through Where the srage rack will not be solely dedicated the srage of commodities requiring a greater level of protection than is available from the overhead sprinkler system, either of the following shall apply: (1) Extend the protection prescribed by horizontally one pallet load in all directions beyond the commodity srage area requiring the higher level of protection. (2) Install a vertical barrier segregate the commodities requiring the higher level of protection from any adjacent commodities Commodities that can be protected by the ceiling level sprinkler system shall be permitted be sred vertically above and horizontally adjacent the portions of the srage rack equipped as prescribed by Horizontal Barriers. Horizontal barriers shall be installed at every tier level of the dedicated srage rack where the rack is equipped with solid shelves Where dedicated srage of carned Group A plastic commodity is in open-frame racks, horizontal barriers shall be installed at vertical increments not exceeding 30 ft (9.1 m) Where dedicated srage of exposed Group A plastic commodity is in open-frame racks, horizontal barriers shall be installed at vertical increments not exceeding 20 ft (6.1 m) The barriers shall span horizontally so that all flue spaces within the rack bay are covered A maximum 3 in. (75 mm) wide gap shall be permitted at rack uprights The solid barrier shall be installed on a horizontal plane within a rack, beneath which in-rack sprinklers shall be installed, as follows: (A) The barrier shall be constructed of minimum 22 gauge (0.7 mm) sheet metal or of minimum 3 8 in. (10 mm) plywood. (B) The barrier shall extend both ends and both aisle faces of the racks covering up both the longitudinal and transverse flue spaces of the rack bays in which they are installed. (C) The barrier shall be fitted within 3 in. (75 mm) of any vertical rack member or other equipment that would create an opening, such as vertical in-rack sprinkler pipe drops In-Rack Sprinklers. Intermediate temperature extended coverage CMDA pendent srage sprinklers with a nominal K-facr of K-25.2 (360) shall be installed beneath each horizontal barrier. The deflecr of the sprinkler shall be located as close the underside of the horizontal barrier as possible Single-Row Racks. (A) For single-row racks, sprinklers shall be installed at each rack mid-bay as shown in Figure (A) for carned Group A plastic commodity and Figure (B) for exposed Group A plastic commodity. (B) The maximum linear spacing between sprinklers shall not exceed 10 ft (3.1 m) Double-Row Racks. (A) For double-row racks, sprinklers shall be installed within the longitudinal flue space at each rack mid-bay as shown in Figure (A) for carned Group A plastic commodity and Figure (B) for exposed Group A plastic commodity.. (B) The maximum linear spacing between sprinklers shall not exceed 10 ft (3.1 m).

10 21 of 34 11/14/2016 9:30 AM Multiple-Row Racks. (A) For multiple-row racks with an overall depth between aisles not exceeding 15 ft 6 in. (4.7 m), an alternating sprinkler arrangement shall be installed within adjacent transverse flue spaces as shown in Figure (A) for carned Group A plastic commodity and Figure (B) for exposed Group A plastic commodity. (B) The maximum linear spacing between sprinklers at the face shall not exceed 10 ft (3.1 m) and shall not exceed 10 ft (3.1 m) between sprinklers at every other bay The design of an in-rack sprinkler system shall be based on a minimum flow of 138 gpm (520 L/min) from the most remote five sprinklers for single-row and double-row racks or the most remote nine sprinklers (three at each face and three in-between) for multiple-row racks The in-rack sprinkler demand shall not be required be hydraulically balanced with the ceiling-level sprinkler system Ceiling Sprinkler System. The ceiling-level sprinkler system shall be designed based on the highest commodity hazard not protected by the criteria prescribed by Submitter Information Verification Submitter Full Name: AUT-SSD Organization: [ Not Specified ] Street Address: City: State: Zip: Submittal Date: Wed Nov 09 09:06:56 EST 2016 Committee Statement Committee Statement: Response Message: The proposed section adds criteria for extended coverage K-25.2 pendent in-rack sprinklers. The proposed criteria is based on a series of full-scale fire tests conducted at UL. The proposed section mirrors the existing Alternative Protection criteria for consistency. Public Input No. 453-NFPA [New Section after ]

11 22 of 34 11/14/2016 9:30 AM Committee Input No. 922-NFPA [ Section No ] Alternative Protection Scheme A. The protection of Group A plastic commodities requiring a greater level of protection than is available from the overhead sprinkler system shall be permitted be protected in accordance with through Where the srage rack will not be solely dedicated the srage of commodities requiring a greater level of protection than is available from the overhead sprinkler system, either of the following shall apply: (1) Extend the protection prescribed by horizontally one pallet load in all directions beyond the commodity srage area requiring the higher level of protection. (2) Install a vertical barrier segregate the commodities requiring the higher level of protection from any adjacent commodities Commodities that can be protected by the ceiling-level sprinkler system shall be permitted be sred vertically above and horizontally adjacent the portions of the srage rack equipped as prescribed by Horizontal Barriers. Horizontal barriers shall be installed at every tier level of the dedicated srage rack where the rack is equipped with solid shelves Where the dedicated srage rack is open-frame, horizontal barriers shall be installed at vertical increments not exceeding 12 ft (3.6 m) The barriers shall span horizontally so that all flue spaces within the rack bay are covered A maximum 3 in. (75 mm) wide gap shall be permitted at rack uprights The solid barrier shall be installed on a horizontal plane within a rack, beneath which in-rack sprinklers shall be installed, as follows: (A) The barrier shall be constructed of minimum 22 gauge (0.7 mm) sheet metal or of minimum 3 8 in. (10 mm) plywood. (B) The barrier shall extend both ends and both aisle faces of the racks covering up both the longitudinal and transverse flue spaces of the rack bays in which they are installed. (C) The barrier shall be fitted within 3 in. (75 mm) of any vertical rack member or other equipment that would create an opening, such as vertical in-rack sprinkler pipe drops In-Rack Sprinklers. Minimum K-8.0 (K-115) quick-response sprinklers (ceiling-level or in-rack) shall be installed beneath each horizontal barrier. The deflecr of the sprinkler shall be located as close the underside of the horizontal barrier as possible Single-Row Racks.

12 23 of 34 11/14/2016 9:30 AM (A) For single-row racks, sprinklers shall be installed at each rack upright and at each rack mid-bay as shown in Figure (A). Figure (A) Alternative Protection Single-Row Racks. (B) The maximum linear spacing between sprinklers shall not exceed 5 ft (1.5 m) Double-Row Racks.

13 24 of 34 11/14/2016 9:30 AM (A) For double-row racks, sprinklers shall be installed at each rack upright within the longitudinal flue space and at the face of the rack and at the mid-bay face of each rack bay as shown in Figure (A). Figure (A) Alternative Protection Double-Row Racks. (B) The maximum linear spacing between sprinklers shall not exceed 5 ft (1.5 m) at the rack face and 10 ft (3.0 m) within the longitudinal flue space Multiple-Row Racks.

14 25 of 34 11/14/2016 9:30 AM (A) For multiple-row racks, an alternating sprinkler arrangement shall be installed within adjacent transverse flue spaces, as shown in Figure (A), with sprinklers at the face of each flue space. Figure (A) Alternative Protection Multiple-Row Racks. (B) The maximum linear spacing between sprinklers at the face and each alternating bay shall not exceed 5 ft (1.5 m) and shall not exceed 10 ft (3.0 m) between sprinklers at every other bay The design of an in-rack sprinkler system shall be based on a minimum flow of 60 gpm (230 L/min) from the most remote six sprinklers for single-row racks or the most remote eight sprinklers for both double-row and multiple-row racks The in-rack sprinkler demand shall not be required be hydraulically balanced with the ceiling-level sprinkler system Ceiling Sprinkler System. The ceiling-level sprinkler system shall be designed based on the highest commodity hazard not protected by the criteria prescribed by

15 26 of 34 11/14/2016 9:30 AM Submitter Information Verification Submitter Full Name: AUT-SSD Organization: National Fire Protection Assoc Street Address: City: State: Zip: Submittal Date: Tue Sep 20 15:15:22 EDT 2016 Committee Statement Committee Statement: Revised for clarity identify the Alternative Protection In-rack Scheme. Response Message: Public Input No. 450-NFPA [Section No ]

16 27 of 34 11/14/2016 9:30 AM Committee Input No. 808-NFPA [ Section No ] For protection of srage of exposed unexpanded Group A plastics, whether encapsulated or nonencapsulated, on single- racks or double-row racks, in-rack sprinklers shall be arranged in accordance with Figure The highest level of in-rack sprinklers shall be not more than 10 ft (3.0 m) below the p of srage. Where this figure is used, aisles shall be at least 4 ft (1.2 m) wide and the ceiling sprinklers shall be designed for a minimum discharge density of 0.45 gpm/ft 2 over 2000 ft 2 (18.3 mm/min over 186 m 2 ). Figure In-Rack Sprinkler Arrangement, Carned Expanded and Nonexpanded Group A Plastic and Exposed Nonexpanded Group A Plastic Commodities, Single- and Double-Row Racks, Srage Height Over 25 ft (7.6 m). Submitter Information Verification Submitter Full Name: AUT-SSD Organization: National Fire Protection Assoc Street Address: City: State: Zip:

17 28 of 34 11/14/2016 9:30 AM Submittal Date: Wed Aug 17 14:10:59 EDT 2016 Committee Statement Committee Statement: Review each figure determine if sprinklers are required outside of the rack. Response Message:

18 29 of 34 11/14/2016 9:30 AM Committee Input No. 926-NFPA [ Section No ] For protection of srage of exposed uncarned unexpanded Group A plastics, whether encapsulated or nonencapsulated, on single- racks or double-row racks, in-rack sprinklers shall be arranged in accordance with Figures (c) and Figure (d) for single row racks and Figures (e) and Figures (f) for double-row racks The highest level of in-rack sprinklers shall be not more than 10 ft (3.0 m) below the p of srage. Where this figure is Where these figures are used, aisles shall be at least 4 ft (1.2 m) wide and the ceiling sprinklers shall be designed for a minimum discharge density of 0.45 gpm/ft 2 over over 2000 ft 2 (18.3 mm/min over 186 m 2 ) A 250 gpm (950 L/min) hose stream allowance shall be included for the in-rack sprinkler design indicated in Figure (d) through Figure (f); the water supply shall meet this sprinkler and hose demand for a minimum 60 minute duration. Figure In 7(a) In -Rack Sprinkler Arrangement, Carned Expanded and Nonexpanded Group A Plastic and Exposed Nonexpanded Group A Plastic Commodities, Single- and Double- Row a Racks Without Solid Shelves, Srage Height Over 25 ft (7.6 m).

19 30 of 34 11/14/2016 9:30 AM ADD NEW FIGURES (b), (c), (d), (e) & (f) as per the attached. Submitter Information Verification Submitter Full Name: AUT-SSD Organization: [ Not Specified ] Street Address: City: State: Zip: Submittal Date: Wed Nov 02 14:42:33 EDT 2016 Committee Statement Committee Statement: Response Message: Testing at FM Global has demonstrated that protection of uncarned unexpanded plastics maintained over 25 ft high in open-frame srage racks cannot be adequately protected by a single line of in-rack sprinklers in the longitudinal flue as shown in Figure The recommended guidance provides in-rack sprinkler protection options for single-row and double-row racks based on the recent testing at FM Global. Support for this guidance is being provided in a separate document.

20 31 of 34 11/14/2016 9:30 AM Committee Input No. 927-NFPA [ New Section after ] The maximum sprinkler deflecr distance below the ceiling shall be 14 in. (350 mm). Submitter Information Verification Submitter Full Name: AUT-SSD Organization: [ Not Specified ] Street Address: City: State: Zip: Submittal Date: Wed Nov 02 15:01:17 EDT 2016 Committee Statement Committee Statement: Response Message: The research supporting this design criteria was done with 14 inch deflecr distance from the ceiling. Public Input No. 460-NFPA [New Section after ]