Glennman CBO
Silver Member
- Joined
- Oct 20, 2009
- Messages
- 441
2012 IMC. Designer is proposing to install flammable flexible air duct material for make up air at a Type I hood. This will ultimately be directly connected to the hood.
The plans show a 24" section of "start up" steel duct, then the flexible duct connects to that so that the flammable duct will end up 18" away from the hood, per 506.3.1.2, at all points.
The code is not completely clear where it states ducts "connecting within" 18" of the hood shall be non-combustible. Does "connecting within" mean "connecting to" ?
Thanks to all in advance.
The plans show a 24" section of "start up" steel duct, then the flexible duct connects to that so that the flammable duct will end up 18" away from the hood, per 506.3.1.2, at all points.
The code is not completely clear where it states ducts "connecting within" 18" of the hood shall be non-combustible. Does "connecting within" mean "connecting to" ?
Thanks to all in advance.