Fire Damper At 1 Hour Floors

Vertical dampers for static airflow systems do not.

Fire damper at 1 hour floors. The shaft wall is noted as 1 hour rating as expected. So in conclusion you do need fire dampers if the duct is not enclosed in a fire rated shaft and penetrates one floor but only one floor and you do need fire dampers where the duct exits a rated shaft. A fire damper is required even if the shaft is only 1 hour fire rated. I was reviewing a building air system design that includes a duct riser that extends from the roof down three floors.

Detail of opening preparation and fire damper installation wall rating 1 hr. If a fire damper is installed in a wall it will be in a vertical position. Static airflow model mfd3. Fire dampers are typically installed in fire rated walls floors or partitions.

1 hour label nailor d0100 series 1 hour rated dynamic curtain fire dampers are ul approved for use where local building codes require the protection of hvac ductwork penetrations in walls partitions or floors that have a fire resistance rating of up to 2 hours. I could use a bit of help trying to understand the code requirement for fire dampers at shaft walls.