07:43PM | 05/12/04
Member Since: 05/11/04
1 lifetime posts
Ok, I'm going to ask a question that I'm fairly sure how it will be answered, but I'll ask anyhow.

I've got a half basement that I'd like to finish. The existing ductwork runs, of course, perpendicular in many areas to the floor joists.

The basement area is kind of tight as is, and I'd like to maximize the space with keeping as much headroom as possible. I really would like to avoid doing soffits or treys, but will if the below inquiry is just too rediculous to bear...

Is cutting through basicaly the entire joist to provide a channel for the ductwork to run flush with the ceiling completely out of the question? I'd imagine I'd run new joists on either side of the channel and maybe even angle iron at the bottom of the duct in line with where the old joist existed.

I realize it would be hard work and even a pipe dream, but any gained space in the area is a win.


06:25AM | 05/13/04
Member Since: 07/01/03
558 lifetime posts
I can't think of any way you can safely cut through the structural members of your floor. Reinforcement with angle iron just can't be rated for integrity, and parallel joists would interfere with the duct runs, the same as the original joists.

You say the that problem is in a number of locations, one option may be to construct a single duct plenum running below the joists and make lateral runs off the top of the plenum, inside the joists to the existing take-offs. This way, you only have one large obsticle, rather than numberous chases. You knew the answer, follow your common sense on this.


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