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// CODE SNIPPET

[F] 403.3.1 Number of Sprinkler Risers and System Design

Building Code 2018 of Illinois > 4 Special Detailed Requirements Based on Occupancy and Use > 403 High-Rise Buildings > 403.3 Automatic Sprinkler System > 403.3.1 Number of Sprinkler Risers and System Design
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Each sprinkler system zone in buildings that are more than 420 feet (128 m) in building height shall be supplied by not fewer than two risers. Each riser shall supply sprinklers on alternate floors. If more than two risers are provided for a zone, sprinklers on adjacent floors shall not be supplied from the same riser.

[F] 403.3.1.1 Riser Location

Sprinkler risers shall be placed in interior exit stairways and ramps that are remotely located in accordance with Section 1007.1.

Related Code Sections


403.3.1 Special Detailed Requirements Based on Occupancy and Use, Number of Sprinkler Risers and System Design
Each sprinkler system zone in buildings that are more than 420 feet (128 m) in building height shall be supplied by not fewer than two risers. Each ...
Building Code 2021 of Illinois > 4 Special Detailed Requirements Based on Occupancy and Use > 403 High-Rise Buildings > 403.3 Automatic Sprinkler System > 403.3.1 Number of Sprinkler Risers and System Design
403.3.1 Special Detailed Requirements Based on Occupancy and Use, Number of Sprinkler Risers and System Design
Each sprinkler system zone in buildings that are more than 420 feet (128 m) in building height shall be supplied by not fewer than two risers. Each ...
Building Code 2018 of Illinois > 4 Special Detailed Requirements Based on Occupancy and Use > 403 High-Rise Buildings > 403.3 Automatic Sprinkler System > 403.3.1 Number of Sprinkler Risers and System Design
28.5* Systems Acceptance, Hydraulic Design Information Sign (Hydraulic Data Nameplate)
The installing contractor shall identify a hydraulically designed sprinkler system with a permanently marked weatherproof metal or rigid plastic sign ...
Standard for the Installation of Sprinkler Systems 2019 of Illinois > 28 Systems Acceptance > 28.5* Hydraulic Design Information Sign (Hydraulic Data Nameplate)
3.3.181 Definitions, Risers
The vertical supply pipes in a sprinkler system ...
Standard for the Installation of Sprinkler Systems 2019 of Illinois > 3 Definitions > 3.3 General Definitions > 3.3.181 Risers
27.1.3 Plans and Calculations,
of high-temperature sprinklers. Total area protected by each system on each floor. Number of sprinklers on each riser per floor. Total number ...
Standard for the Installation of Sprinkler Systems 2019 of Illinois > 27 Plans and Calculations > 27.1* Working Plans > 27.1.3
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