HomeMy WebLinkAbout405.026 - Fire Sprinkler Arm-Over RequirementsEffective Date: May 2014 Justin H. Beal, Fire Prevention Engineer
Current Revision Date: 5/21/2025 Section 405.026
Next Revision Date: 5/21/2028 Page 1 of 2
Fresno City Fire Department
400 Prevention Manual
SECTION 405.026 FIRE SPRINKLER ARM-OVER REQUIREMENTS
PURPOSE
The purpose of this policy is to clarify the Fresno Fire Department’s (FFD or
Department) requirements related to the installation of arm-overs in fire sprinkler
systems.
APPLICATION
This policy applies to all fire sprinkler systems throughout the City of Fresno (COF)
and contract service areas. These requirements apply to both required and voluntary
systems.
OPERATIONAL POLICY
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OPERATIONAL GUIDELINE
Generally, it is permissible to install a maximum of two (2) automatic fire sprinklers on
a single, 1 inch (1”) arm-over (or other length of pipe) when each automatic fire
sprinkler is physically located within, and serves, a different compartment within a
building.
Multiple automatic fire sprinklers may be supplied by a single, 1 inch (1”) arm-over (or
other length of pipe), but only after the fire sprinkler system has been hydraulically
calculated, and the hydraulic calculations demonstrate that the minimum required
pressure and volume for each automatic fire sprinkler being supplied by the arm-over
(or other length of pipe) can been supplied.
The Fire Marshal (or designee), may modify, restrict, or prohibit such installations at
their sole discretion.
PROCESS
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Effective Date: May 2014 Justin H. Beal, Fire Prevention Engineer
Current Revision Date: 5/21/2025 Section 405.026
Next Revision Date: 5/21/2028 Page 2 of 2
INFORMATION
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DEFINITIONS
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CROSS-REFERENCES
No cross references recognized.