// CODE SNIPPET
607.3.2 Damper Rating
JUMP TO FULL CODE CHAPTER
Fire dampers shall have the minimum fire protection rating specified in Table 607.3.2.1 for the type of penetration.
[BF] TABLE 607.3.2.1 FIRE DAMPER RATING
[BF] TABLE 607.3.2.1 FIRE DAMPER RATING
| TYPE OF PENETRATION | MINIMUM DAMPER RATING (hour) |
| Less than 3-hour fire-resistance-rated assemblies | 11/2 |
| 3-hour or greater fire-resistance-rated assemblies | 3 |
Smoke damper leakage ratings shall be Class I or II. Elevated temperature ratings shall be not less than 250°F (121°C).
Combination fire/smoke dampers shall have the minimum fire protection rating specified for fire dampers in Table 607.3.2.1 for the type of penetration and shall have a minimum smoke damper rating as specified in Section 607.3.2.2.
Corridor dampers shall have the following minimum ratings.
- One hour fire-resistance rating.
- Class I or II leakage rating as specified in Section 607.3.2.2.
Related Code Sections
607.3.2 Duct Systems, Damper Rating
Damper ratings shall be in accordance with Sections 607.3.2.1 through 607.3.2.3 ...
2012 Virginia Mechanical Code > 6 Duct Systems > 607 Duct and Transfer Openings > 607.3 Damper Testing, Ratings and Actuation > 607.3.2 Damper Rating
607.3.2 Duct Systems, Damper Rating
Damper ratings shall be in accordance with Sections 607.3.2.1 through 607.3.2.4 ...
2015 Virginia Mechanical Code > 6 Duct Systems > 607 Duct and Transfer Openings > 607.3 Damper Testing, Ratings and Actuation > 607.3.2 Damper Rating
717.3.2 Fire and Smoke Protection Features, Damper Rating
Damper ratings shall be in accordance with Sections 717.3.2.1 through 717.3.2.3 ...
2012 Virginia Construction Code (USBC, Part I) > 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 Fire and Smoke Protection Features, Damper Rating
Damper ratings shall be in accordance with Sections 717.3.2.1 through 717.3.2.4 ...
2015 Virginia Construction Code (USBC, Part I) > 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 and Smoke Protection Features, Fire Damper Ratings
Fire dampers shall have the minimum fire protection rating specified in Table 717.3.2.1 for the type of penetration.
TABLE 717.3.2.1 ...
2015 Virginia Construction Code (USBC, Part I) > 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