8.1.2* System valves and gauges shall be accessible for opera-tion, inspection, tests, and maintenance.

8.2 System Protection Area Limitations.

8.2.1 The maximum floor area on any one floor to be pro-tected by sprinklers supplied by any one sprinkler system riseror combined system riser shall be as follows:

(1) Light hazard 52,000 ft2 (4831 m2)(2) Ordinary hazard 52,000 ft2 (4831 m2)(3) Extra hazard

(a) Pipe schedule 25,000 ft2 (2323 m2)(b) Hydraulically calculated 40,000 ft2 (3716 m2)

(4) Storage High-piled storage (as defined in 3.9.1.17) andstorage covered by other NFPA standards 40,000 ft2

(3716 m2)

8.2.2 The floor area occupied by mezzanines shall not beincluded in the area limits of 8.2.1.

8.2.3 Where single systems protect extra hazard, high-piledstorage, or storage covered by other NFPA standards, and or-dinary or light hazard areas, the extra hazard or storage areacoverage shall not exceed the floor area specified for that haz-ard and the total area coverage shall not exceed 52,000 ft2

(4831 m2).

8.2.4 Multiple buildings attached by canopies, coveredbreezeways, common roofs, or a common wall(s) shall be per-mitted to be supplied by a single fire sprinkler riser. The maxi-mum system size shall comply with 8.2.1.

8.2.5* Detached Buildings.

8.2.5.1 Unless the requirements of 8.2.5.2 apply, detachedbuildings, regardless of separation distance, that do not meetthe criteria of 8.2.4 shall be provided with separate fire sprin-kler systems.

8.2.5.2 When acceptable to the authority having jurisdiction,detached structures shall be permitted to be supplied by thefire sprinkler system of an adjacent building.

8.3 Use of Sprinklers.

8.3.1 General.

8.3.1.1* Sprinklers shall be installed in accordance with theirlisting.

8.3.1.2 The requirements of 8.3.1.1 shall not apply whereconstruction features or other special situations require un-usual water distribution, and listed sprinklers shall be permit-ted to be installed in positions other than anticipated by theirlisting to achieve specific results.

8.3.1.3* Upright sprinklers shall be installed with the framearms parallel to the branch line, unless specifically listed forother orientation.

8.3.1.4 Where solvent cement is used as the pipe and fittingsbonding agent, sprinklers shall not be installed in the fittingsprior to the fittings being cemented in place.

8.3.1.5 Protective Caps and Straps.

8.3.1.5.1* Protective caps and straps shall be removed usingmeans that are in accordance with the manufacturers instal-lation instructions.

8.3.1.5.2* Protective caps and straps shall be removed from allsprinklers prior to the time when the sprinkler system isplaced in service.

8.3.1.5.3 Protective caps and straps on all upright sprinklersor on any sprinklers installed more than 10 ft (3 m) above thefloor shall be permitted to be removed from sprinklers imme-diately following their installation.

8.3.2 Temperature Ratings.

8.3.2.1* Unless the requirements of 8.3.2.2, 8.3.2.3, 8.3.2.4, or8.3.2.5 are met, ordinary- and intermediate-temperaturesprinklers shall be used throughout buildings.

8.3.2.2 Where maximum ceiling temperatures exceed 100F(38C), sprinklers with temperature ratings in accordancewith the maximum ceiling temperatures of Table 6.2.5.1 shallbe used.

8.3.2.3 High-temperature sprinklers shall be permitted to beused throughout ordinary and extra hazard occupancies and asallowed in this standard and other NFPA codes and standards.

8.3.2.4 Sprinklers of intermediate- and high-temperatureclassifications shall be installed in specific locations as re-quired by 8.3.2.5.

8.3.2.5* The following practices shall be observed to providesprinklers of other than ordinary-temperature classificationunless other temperatures are determined or unless high-temperature sprinklers are used throughout, and tempera-ture selection shall be in accordance with Table 8.3.2.5(a),Table 8.3.2.5(b), and Figure 8.3.2.5:

(1) Sprinklers in the high-temperature zone shall be ofthe high-temperature classification, and sprinklers inthe intermediate-temperature zone shall be of theintermediate-temperature classification.

(2) Sprinklers located within 12 in. (305 mm) to one sideor 30 in. (762 mm) above an uncovered steam main,heating coil, or radiator shall be of the intermediate-temperature classification.

(3) Sprinklers within 7 ft (2.1 m) of a low-pressure blowoffvalve that discharges free in a large room shall be of thehigh-temperature classification.

(4) Sprinklers under glass or plastic skylights exposed to thedirect rays of the sun shall be of the intermediate-temperature classification.

(5) Sprinklers in an unventilated, concealed space, underan uninsulated roof, or in an unventilated attic shall beof the intermediate-temperature classification.

(6) Sprinklers in unventilated show windows having high-powered electric lights near the ceiling shall be of theintermediate-temperature classification.

(7) Sprinklers protecting commercial-type cooking equip-ment and ventilation systems shall be of the high- or ex-tra hightemperature classification as determined by useof a temperature-measuring device. (See 7.10.6.)

(8) Sprinklers protecting residential areas installed nearspecific heat sources identified in Table 8.3.2.5(c) shallbe installed in accordance with Table 8.3.2.5(c).

(9) Ordinary-temperature sprinklers located adjacent to aheating duct that discharges air that is less than 100F(38C) are not required to be separated in accordancewith Table 8.3.2.5(a).

(10) Sprinklers in walk-in type coolers and freezers with auto-matic defrosting shall be of the intermediate-temperatureclassification or higher.

1346 INSTALLATION OF SPRINKLER SYSTEMS

2010 Edition

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