This is lightweight commercial ceiling framing to enclose the ductwork in the apartments in Avenal, Ca. Notice we have already installed the fire envelope above the duct chase. This is a common practice with multiple floors of apartments.
![](http://www.wcdconst.com/wp-content/uploads/2016/01/IMG_0892-690x462.jpg)
This is lightweight commercial ceiling framing to enclose the ductwork in the apartments in Avenal, Ca. Notice we have already installed the fire envelope above the duct chase. This is a common practice with multiple floors of apartments.