#1878148 - 01/23/08 12:03 PM
Ceiling cloud construction
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Jabbaz
Senior Member
Registered: 04/12/04
Posts: 134
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Hello,
I'm looking for some ceiling cloud construction advice. I have very little construction experience so I'm just looking for some starter tips.
I've decided to use 4" thick 703 panels with a 4" airgap. I've determined my maximum cloud dimensions to be 10'2" x 5'5", which will allow me five standard panels (6 if I cut the panels down and arrange them more efficiently - more work, but more coverage).
Five 4" panels weigh roughly 40lbs, plus I'm thinking of substituting some of the rear panels with a couple ~20lb wooden skyline diffusers. The whole setup (frame included) could approach 75lbs. Is this safe to suspend from joists in a typical small room? Are there any special considerations with respect to WHERE the loads attach to joists (I imagine the perimeter is safer than the center of the room...)?
As for construction of the frame, what materials are typically used? Is there some commercially available product that is sturdy, light, and simple to assemble? I'm prepared to get my hands dirty, but a simple approach is preferred.
Oh... also I'd like to flush mount a lighting fixture in the center of the cloud.
If anyone could give me some tips, or point me to some construction diaries of similar projects I'd be very grateful.
Thanks!
Dave
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#1878569 - 01/24/08 06:44 AM
Re: Ceiling cloud construction
[Re: Jabbaz]
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spacefolder
Member
Registered: 03/22/07
Posts: 23
Loc: Buenos Aires, Argentina
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Hi Jabbaz,
Here are some pictures of the making of my control room.
You can clearly see the ceiling cloud on the first images.
Itīs 1.80m x 1.50m, (roughly 5ft x 5ftft) 4" thick, filled with 705, and the frame is built using 1" pine wood.
What I can definitely suggest, is that you use thicker wood, beacuse the cloud ended up weighing too much (Dumb of me, didnīt make the math!  ) Also use thick wire to hang it from the ceiling, just in case!
hereīs the url:
http://picasaweb.google.com/sauceelectrico/20070505CornerTrapsYCloud
Hope this is usefull,
Cheers
SpaceFolder
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#1878587 - 01/24/08 07:20 AM
Re: Ceiling cloud construction
[Re: spacefolder]
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Jabbaz
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Registered: 04/12/04
Posts: 134
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Thanks spacefolder! Looks really good, thanks for the ideas.
You say you used 1" but that it was really heavy - but then you say you wished you'd used thicker wood. Do you mean it wasn't sturdy enough, or did you actually mean I should use _thinner_ wood.
I'm thinking of going with this sort of approach:
http://www.johnlsayers.com/phpBB2/files/unit_2_imp_150.jpeg
But using 6" x 1" for the exterior. My calculated overall weight is 90lbs, but it's spread out over a large area. Is this too heavy for any ceiling?
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#1878606 - 01/24/08 07:36 AM
Re: Ceiling cloud construction
[Re: Jabbaz]
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Ethan Winer
MP Hall of Fame Member
Registered: 06/12/00
Posts: 5405
Loc: New Milford, CT, USA
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As for construction of the frame, what materials are typically used? Is there some commercially available product that is sturdy, light, and simple to assemble?
Maybe a standard ceiling grid?
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#1878613 - 01/24/08 07:42 AM
Re: Ceiling cloud construction
[Re: Jabbaz]
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spacefolder
Member
Registered: 03/22/07
Posts: 23
Loc: Buenos Aires, Argentina
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Sorry, it was a bit confusing, i can admit.
I ment to say that it was not sturdy enough for such amount
of rigid fiber glass. When you start filling the wood frame,
it gets really heavy, and the wood seems to flex.
By the way, I donīt completely understand the johnlsayers approach. The MDF panels seems to be blocking the entrance of soundwaves into the airgap and the sides of the cloud, is this correct?
""But using 6" x 1" for the exterior. My calculated overall weight is 90lbs, but it's spread out over a large area. Is this too heavy for any ceiling? "" -- I dinīt have problem with that, I have a concrete ceiling
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#1878814 - 01/24/08 01:47 PM
Re: Ceiling cloud construction
[Re: spacefolder]
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Jabbaz
Senior Member
Registered: 04/12/04
Posts: 134
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Ethan: My understanding of the standard ceiling grids is they attach to the walls... i cannot have this as my ceiling-to-wall traps will obstruct this joint.
Spacefolder: I find it surprising that your frame flexed... how many panels did you have in it?
I would modify the johnlsayers diagram to support the panels using approximately four 2" thick L-brackets. You're going to lose some surface area no matter what, I figure, but L brackets would have minimal interference and should support a panel easily.
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