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// CODE SNIPPET

717.3.2.1 Fire Damper Ratings

Building Code 2018 of Illinois > 7 Fire and Smoke Protection Features > 717 Ducts and Air Transfer Openings > 717.3 Damper Testing, Ratings and Actuation > 717.3.2 Damper Rating > 717.3.2.1 Fire Damper Ratings
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Fire dampers shall have the minimum rating specified in Table 717.3.2.1.

TABLE 717.3.2.1
FIRE DAMPER RATING
TYPE OF
PENETRATION
MINIMUM
DAMPER
RATING (hours)
Less than 3-hour fire-resistance-rated assemblies 1.5
3-hour or greater fire-resistance-rated assemblies 3

Related Code Sections


717.3.2.1 Fire and Smoke Protection Features, Fire Damper Ratings
Fire dampers shall have the minimum rating specified in Table 717.3.2.1. TABLE 717.3.2.1 FIRE DAMPER RATING ...
Building Code 2021 of Illinois > 7 Fire and Smoke Protection Features > 717 Ducts and Air Transfer Openings > 717.3 Damper Testing, Ratings and Actuation > 717.3.2.1 Fire Damper Ratings
717.3.2.1 Fire and Smoke Protection Features, Fire Damper Ratings
Fire dampers shall have the minimum rating specified in Table 717.3.2.1. TABLE 717.3.2.1 FIRE DAMPER RATING TYPE OF PENETRATION ...
Building Code 2018 of Illinois > 7 Fire and Smoke Protection Features > 717 Ducts and Air Transfer Openings > 717.3 Damper Testing, Ratings and Actuation > 717.3.2 Damper Rating > 717.3.2.1 Fire Damper Ratings
(E) Equipment for General Use, Dampers
shall possess a standard fire rating of not less than 1 1 / 2 hours. Informational Note: See ANSI/UL 555-2011, Standard for Fire Dampers ...
National Electrical Code 2017 of Illinois > 4 Equipment for General Use > 450 Transformers and Transformer Vaults (Including Secondary Ties) > 450.45 Ventilation Openings > (E) Dampers
(E) Equipment for General Use, Dampers
shall possess a standard fire rating of not less than 1 1 / 2 hours. Informational Note: See ANSI/UL 555—2016, Standard for Fire Dampers ...
National Electrical Code 2020 of Illinois > 4 Equipment for General Use > 450 Transformers and Transformer Vaults (Including Secondary Ties) > 450.45 Ventilation Openings > (E) Dampers
717.6.2 Fire and Smoke Protection Features, Membrane Penetrations
that ceiling radiation dampers are not required in order to maintain the fire-resistance rating of the assembly. Where exhaust duct or outdoor ...
Building Code 2018 of Illinois > 7 Fire and Smoke Protection Features > 717 Ducts and Air Transfer Openings > 717.6 Horizontal Assemblies > 717.6.2 Membrane Penetrations
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