Looking for good ideas/details to construct a wood framed/furred suspended drywall ceiling.
An example is attached... not necessarily what am looking for, but it may at least help clarify the question ?
Any tried and true ideas would be great.
I did one once where I bolted ledgers to the studs with Ledgerloks, and hung joists between the ledgers from joist hangers. Span wasn't too great, though.
Thank you for the replies and good questions !
Answers (hopefully) to questions...
1. residential addition, space (mechanicals) for duct runs etc (soffits not an option)
2. 20' x 20' rec room with extra height available, bedrooms/bathroom above (so also need to reduce noise to above rooms)
3. 'wood' idea to keep it in local carpenter realm
4. probably would be secured at walls (maybe hang with wood members?), dwg from Knauf Drywall brochure kinda different, but maybe creates some thoughts ?
2x8 Doug Fir spans 23'10" as a cieling joist, drywall attached, no attic storage, which sounds like it would apply to your situation, as it's basically a drop cieling.
Ledgerlok ledger boards to the walls where you want the cieling to come down to, and mount joist hangers. :thumbsup:
2x6 DF spans 19'11" at 12" centers. Minus 3" for for the 2 ledgers, and you're in there. :thumbsup:
I wonder if you could install some kind of hanger, like Simpson strapping, to stabilize mid-span a bit. It's not really structural, but you could always run it by your engineer anyway.
Or, maybe open web trusses for the entire floor framing... more cost effective in terms of labor etc
Looks like you steel-guys are all from back east (of the Mississippi)
But, maybe we can find some west-coast residential drywall guys who know what they are doing (with suspended metal channels with drywall clgs) and some (high) STC info to back it up... btw, any STC (online or other available docs) info to go along with your steel suggestion/s ?
Thanks for the reference, lots of good details.
Although, couldnt find anything about STC (Sound Transmission Class) ratings for the suspended drywall clgs below a wood floor... unless missed something ?
1. Fill the void with batt insulation to reduce sound transfer.
2. Could also put resilient channels on the bottom of the steel framing.
3.Add layer of drywall then rc then ceiling.
4. Add high quality pad beneath floating floor above.
5. Caulk all voids and penetrations
6. How much do you want to spend?
Wood framing (not metal), but yes, looks like improvisation may be the only way to go... like maybe modifying the some of the details in the attached pdf per your notes, use resilient metal channels instead of Ts, etc.
The client is still working on the budget estimate priorities, but money is an object.
Reduce sound transmission
1. Fill the void with batt insulation to reduce sound transfer.
2. Could also put resilient channels on the bottom of the steel framing.
3.Add layer of drywall then rc then ceiling.
4. Add high quality pad beneath floating floor above.
5. Caulk all voids and penetrations
6. How much do you want to spend?
Did find an STC reference in the 'archives' (attached pdf).
Kinda old, but gives some idea.
Havent found any updates... but may have some other possibilities coming up.
If you use RC, when installing the drywall, be careful not to plow through the rc with your fastener into the joists. That basically renders the rc useless.
Why not run a beam down the center where span is shorter bucketed or pocketed, throw 2x6 rafters in that would only span about 12'@16" o.c. and boom, done.
Personally I would use 21guage steel 1/4" all thread and hanging clamps throw some wire up in between in place to help rigidity, I've hung some massive restaurant hanging walls with that.
chicago grid
1 ceiling will be nice an level
2 faster than wood framing
3 installs like regular accoustical grid, and you accuracy is not that critical, so therefore you can get anyone to do it (with that said, you should still square your grid up) I install alot of suprafine and accuracy is very critical
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