This chapter shall apply to any of the following situations:
- Miscellaneous storage of Class I through Class IV commodities up to 12 ft (3.7 m) in height
- Miscellaneous storage of Group A plastics up to 12 ft (3.7 m) in height
- Miscellaneous storage of rubber tires up to 12 ft (3.7 m) in height
- Miscellaneous storage of rolled paper up to 12 ft (3.7 m) in height
- Storage of Class I through Class IV commodities up to 12 ft (3.7 m) in height as directed by 14.2.3.1 and 16.2.1.2.1
- Storage of Group A plastics up to 5 ft (1.5 m) in height as directed by 15.2.1 and 17.2.1.1
For storage of Class I through Class IV 12 ft (3.7 m) or less in height that does not meet the definition of Miscellaneous Storage that is on solid shelf racks, in-rack sprinklers shall be provided in accordance with 16.1.6, and ceiling sprinkler protection shall be provided in accordance with Chapter 13.
For storage of Group A Plastics 5 ft (1.5 m) or less in height that does not meet the definition of Miscellaneous Storage that is on solid shelf racks, in-rack sprinklers shall be provided in accordance with 17.1.5, and ceiling sprinkler protection shall be provided in accordance with Chapter 13.
The protection criteria shall be selected from Table 13.2.1 and Figure 13.2.1.
Table 13.2.1 Discharge Criteria for Miscellaneous Storage Up to 12 ft (3.7 m) in Height
| Commodity | Type of Storage | Storage Height | Maximum Ceiling Height | Design Curve Figure 13.2.1 | Note | Duration (minutes) | |||
|---|---|---|---|---|---|---|---|---|---|
| ft | m | ft | m | ||||||
| Class I to Class IV | |||||||||
| Class I | Solid-piled, palletized, bin box, shelf, single-, double-, multiple-row rack, and back-to-back shelf storage | ≤12 | ≤3.7 | — | — | OH1 | 90 | ||
| Class II | ≤10 | ≤3.0 | — | — | OH1 | 90 | |||
| Class II | >10 to ≤12 | >3.0 to ≤3.7 | — | — | OH2 | 90 | |||
| Class III | ≤12 | ≤3.7 | — | — | OH2 | 90 | |||
| Class IV | ≤10 | ≤3.0 | — | — | OH2 | 90 | |||
| Class IV | Palletized, bin box, shelf, and solid-piled | >10 to ≤12 | >3.0 to ≤3.7 | 32 | 10 | OH2 | 90 | ||
| Single-, double-, multiple-row rack and back-to-back shelf storage | >10 to ≤12 | >3.0 to ≤3.7 | 32 | 10 | EH1 | 120 | |||
| Group A Plastic Storage | |||||||||
| Cartoned | Unexpanded and expanded | Solid-piled, palletized, bin box, shelf, single-, double-, multiple-row rack, and back-to-back shelf storage | ≤5 | ≤1.5 | — | — | OH2 | 90 | |
| >5 to ≤10 | >1.5 to ≤3.0 | 15 | 4.6 | EH1 | 120 | ||||
| >5 to ≤10 | >1.5 to ≤3.0 | 20 | 6.1 | EH2 | 120 | ||||
| >10 to ≤12 | >3.0 to ≤3.7 | 17 | 5.2 | EH2 | 120 | ||||
| Solid-piled, palletized, bin box, shelf, and back-to-back shelf storage | >10 to ≤12 | >3.0 to ≤3.7 | 32 | 10 | EH2 | 120 | |||
| Single-, double-, multiple-row rack | >10 to ≤12 | >3.0 to ≤3.7 | 32 | 10 | OH2 | +1 level of in-rack | 90 | ||
| Exposed | Solid-piled, palletized, bin box, shelf, single-, double-, multiple-row rack, and back-to-back shelf storage | ≤5 | ≤1.5 | — | — | OH2 | 90 | ||
| Solid-piled, palletized, bin box, shelf, and back-to-back shelf storage | >5 to ≤8 | >1.5 to ≤2.4 | 28 | 8.5 | EH2 | 120 | |||
| Solid-piled, palletized, bin box, shelf, single-, double-, multiple-row rack, and back-to-back shelf storage | >5 to ≤10 | >1.5 to ≤3.0 | 15 | 4.6 | EH2 | 120 | |||
| Unexpanded | Solid-piled, palletized, bin box, shelf, single-, double-, multiple-row rack, and back-to-back shelf storage | >5 to ≤10 | >1.5 to ≤3.0 | 20 | 6.1 | EH2 | 120 | ||
| Expanded | Single-, double-, multiple-row rack | >5 to ≤10 | >1.5 to ≤3.0 | 20 | 6.1 | OH2 | +1 level of in-rack | 90 | |
| Unexpanded and expanded | Solid-piled, palletized, bin box, shelf, and back-to-back shelf storage | >10 to ≤12 | >3.0 to ≤3.7 | 17 | 5.2 | EH2 | 120 | ||
| Single-, double-, multiple-row rack | >10 to ≤12 | >3.0 to ≤3.7 | 17 | 5.2 | EH2 | 120 | |||
| >10 to ≤12 | >3.0 to ≤3.7 | 32 | 10 | OH2 | +1 level of in-rack | 90 | |||
| Tire Storage | |||||||||
| Tires | On floor, on side | >5 to ≤12 | >1.5 to ≤3.7 | 32 | 10 | EH1 | 120 | ||
| On floor, on tread, or on side | ≤5 | ≤1.5 | — | — | OH2 | 90 | |||
| Single-, double-, or multiple-row racks on tread or on side | ≤5 | ≤1.5 | — | — | OH2 | 90 | |||
| Single-row rack, portable, on tread or on side | >5 to ≤12 | >1.5 to ≤3.7 | 32 | 10 | EH1 | 120 | |||
| Single-row rack, fixed, on tread or on side | >5 to ≤12 | >1.5 to ≤3.7 | 32 | 10 | EH1 | 120 | |||
| >5 to ≤12 | >1.5 to ≤3.7 | 32 | 10 | OH2 | +1 level of in-rack | 90 | |||
| Rolled Paper Storage | |||||||||
| Heavyweight and mediumweight | On end | ≤10 | ≤3.0 | 30 | 9.1 | OH2 | 90 | ||
| Tissue and lightweight | On end | ≤10 | ≤3.0 | 30 | 9.1 | EH1 | 120 | ||
FIGURE 13.2.1 Miscellaneous Storage Up to 12 ft (3.7 m) in Height — Design Curves (see Table 13.2.1).
Installation criteria as permitted by NFPA 13 and design criteria and modifiers as permitted by the density/area method of Chapter 11 for ordinary hazard Group 1, ordinary hazard Group 2, extra hazard Group 1, and extra hazard Group 2 occupancies shall be applicable.
Where K-11.2 (160) or larger sprinklers are used with EH1 or EH2 design curves from Figure 13.2.1, the design area shall be permitted to be reduced by 25 percent but not below 2000 ft2 (186 m2), regardless of temperature rating.
In-rack sprinklers required by Table 13.2.1 shall meet the requirements of this section and the applicable storage protection and arrangement sections of this chapter.
In-rack sprinklers shall have a K-factor of 5.6 (80) or larger and operate at a minimum of 15 psi (1 bar).
Where one level of in-rack sprinklers is installed for miscellaneous storage, water demand shall be based on simultaneous operation of the hydraulically most demanding four adjacent sprinklers.
In-rack sprinklers for miscellaneous storage shall be located at the first tier level at or above one-half of the storage height.
In-rack sprinklers shall be located in the longitudinal flue at the intersection of the transverse flues while not exceeding the maximum spacing rules.
If no longitudinal flue is provided in single- and double-row racks, in-rack sprinklers shall be located within 12 in. (300 mm) of the center of the rack while not exceeding the maximum spacing.
Where distances between transverse flues exceed the maximum allowable distances, 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 distance rules.