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// CODE SNIPPET

605.0 Smoke Dampers, Fire Dampers, and Ceiling Dampers

Uniform Mechanical Code 2018 of Nevada > 6 Duct Systems > 605.0 Smoke Dampers, Fire Dampers, and Ceiling Dampers
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605.1 Smoke Dampers

Smoke dampers shall comply with UL 555S, and shall be installed in accordance with the manufacturer's installation instructions where required by the building code.

605.2 Fire Dampers

Fire dampers shall comply with UL 555, and shall be installed in accordance with the manufacturer's installation instructions where required by the building code. Fire dampers shall have been tested for closure under airflow conditions and shall be labeled for both maximum airflow permitted and direction of flow. Where more than one damper is installed at a point in a single air path, the entire airflow shall be assumed to be passing through the smallest damper area.
Ductwork shall be connected to damper sleeves or assemblies in accordance with the fire damper manufacturer's installation instructions.

605.3 Ceiling Radiation Dampers

Ceiling radiation dampers shall comply with UL 555C, and shall be installed in accordance with the manufacturer's installation instructions in the fire-resistive ceiling membrane of floor-ceiling and roof-ceiling assemblies where required by the building code. Fire dampers not meeting the temperature limitation of ceiling radiation dampers shall not be used as a substitute.

605.4 Multiple Arrangements

Where size requires the use of multiple dampers, each damper shall be listed for use in multiple arrangements and installed in accordance with the manufacturer's installation instructions.

605.5 Access and Identification

Fire and smoke dampers shall be provided with an approved means of access large enough to allow inspection and maintenance of the damper and its operating parts. The access shall not affect the integrity of the fire-resistance-rated assembly. The access openings shall not reduce the fire-resistance rating of the assembly.
Access shall not require the use of tools. Access doors in ducts shall be tight fitting and approved for the required duct construction. Access points shall be permanently identified on the exterior by a label with letters not less than 1/2 of an inch (12.7 mm) in height reading as one of the following:
  1. Smoke Damper
  2. Fire Damper
  3. Fire/Smoke Damper

605.6 Freedom From Interference

Dampers shall be installed in a manner to ensure positive closing or opening as required by function. Interior liners or insulation shall be held back from portions of a damper, its sleeve, or adjoining duct that would interfere with the damper's proper operation. Exterior materials shall be installed so as to not interfere with the operation or maintenance of external operating devices needed for the function of the damper.

605.7 Temperature Classification of Operating Elements

Fusible links, thermal sensors, and pneumatic or electric operators shall have a temperature rating or classification as in accordance with the building code.

Related Code Sections


605.0 Duct Systems, Smoke Dampers, Fire Dampers, and Ceiling Dampers
where required by the building code. Fire dampers not meeting the temperature limitation of ceiling radiation dampers shall not be used as a substitute ...
Uniform Mechanical Code 2018 of Nevada > 6 Duct Systems > 605.0 Smoke Dampers, Fire Dampers, and Ceiling Dampers
605.6 Duct Systems, Freedom From Interference
Dampers shall be installed in a manner to ensure positive closing or opening as required by function. Interior liners or insulation shall be held ...
Uniform Mechanical Code 2018 of Nevada > 6 Duct Systems > 605.0 Smoke Dampers, Fire Dampers, and Ceiling Dampers > 605.6 Freedom From Interference
605.7 Duct Systems, Temperature Classification of Operating Elements
Fusible links, thermal sensors, and pneumatic or electric operators shall have a temperature rating or classification as in accordance ...
Uniform Mechanical Code 2018 of Nevada > 6 Duct Systems > 605.0 Smoke Dampers, Fire Dampers, and Ceiling Dampers > 605.7 Temperature Classification of Operating Elements
717.2 Fire and Smoke Protection Features, Installation
Fire dampers, smoke dampers, combination fire/smoke dampers and ceiling radiation dampers located within air distribution and smoke control systems ...
Building Code 2018 of Nevada > 7 Fire and Smoke Protection Features > 717 Ducts and Air Transfer Openings > 717.2 Installation
717.2 Fire and Smoke Protection Features, Installation
Fire dampers, smoke dampers, combination fire/smoke dampers and ceiling radiation dampers located within air distribution and smoke control systems ...
Building Code 2012 of Nevada > 7 Fire and Smoke Protection Features > 717 Ducts and Air Transfer Openings > 717.2 Installation
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