Can I install a ceiling?

Posted by dpb on October 13, 2009, 4:01 pm

DD_BobK wrote:
...

> also....Metal roofing is not all that lightweight 20 gage steel would
> be ~equal to 7/16 OSB.

You'd be hard pressed to find 20 ga exterior siding; 26 is far more
common inexpensive. Didn't look up actual mil thickness difference but
it's certainly quite a lot lighter.

That said, the question of what the lower chords are designed to carry
still remains and will until OP finds out unless he does just want to
wing it and see what happens...(not highly recommended, btw :) ).

--

Posted by DD_BobK on October 13, 2009, 9:20 pm

> DD_BobK wrote:
> ...

> > also....Metal roofing is not all that lightweight =A020 gage steel woul=

> > be ~equal to 7/16 OSB.

> You'd be hard pressed to find 20 ga exterior siding; 26 is far more
> common inexpensive. =A0Didn't look up actual mil thickness difference but
> it's certainly quite a lot lighter.
> That said, the question of what the lower chords are designed to carry
> still remains and will until OP finds out unless he does just want to
> wing it and see what happens...(not highly recommended, btw :) ).
> --

Thanks Duane...

I just pulled the a number out of the air to do the weight calc.....

20 gage (.038?) was the only "thin" gage I could recall.

I have no experience with metal siding & only minimal with metal
roofing.....I thought 20 gage was pretty thin

but it looks like roofing and siding are even thinner than I had
imagined.
Plus (doh!) I was thinking steel....aluminum would be even lighter

So maybe a ceiling made of siding makes sense?

cheers
Bob

Posted by RicodJour on October 13, 2009, 2:00 pm

> > >> My detached garage with metal siding has 2x4 trusses spaced 4 feet o=

> > >> center. Can I install a ceiling or will this be too much weight and
> > >> cause sagging/or other problems?
> > > 4' on center? =A0What's on top of the trusses that's spanning 4'? =A0=

With

> > > that spacing - a likely cost saving measure - it's unlikely there's a
> > > lot of leeway in the load handling capabilities of the roof framing.
> > > You'd have to frame a ceiling before you could cover it, and with 4'
> > > between trusses that wouldn't be easy to do with a light structure.
> > > The lightest ceiling I could think of would be the plastic corrugated
> > > roofing stuff, and that would still sag a bunch with 4' spacing.

> > A hanging ceiling is very light and could likely be used. Don't know
> > about adding lights to it though. =A0Check with your local code office.
> > No one here can tell you for sure.

> This is a 30 x30 garage with a metal roof. I think it is a 3 or 4 12
> pitch. My ideas was to add 2x4's every 4 feet between trusses and use
> 7/16 osb for a ceiling. If everyone here thinks it might sag or is a
> bad idea, I thought abotu using 4x8 insulated panels? I wonder how
> that would look?

Without information on what the bottom chords of those trusses were
designed to carry, it's stupid to guess. The suggestion of a
suspended acoustic ceiling is about the only thing I would not have
any qualms about, and that would depend on how many light fixtures you
were going to install in it.

If you can determine who built the metal building, you'd probably be
able to find out the load information on the trusses.

R

Posted by Joe on October 13, 2009, 2:12 pm

> My detached garage with metal siding has 2x4 trusses spaced 4 feet on
> center. Can I install a ceiling or will this be too much weight and
> cause sagging/or other problems?

Buy some more metal siding in lengths to span the garage perpendicular
to the trusses. it will likely meet code where you are, it's light
weight, it can carry a full 6" insulation batt or more if you need to
heat the place and it doesn't burn. With a helper you could do the
whole building in an hour. No problems with sagging, termites, or
other annoyances. Choose a nice pattern and it won't look bad at all.
If the siding available seems too gauche for your taste, most farm
building makers will have real ceiling panels you can buy. Maybe a bit
pricier, but prettier.

Joe

Posted by Zephyr on October 13, 2009, 2:59 pm

> > My detached garage with metal siding has 2x4 trusses spaced 4 feet on
> > center. Can I install a ceiling or will this be too much weight and
> > cause sagging/or other problems?

> Buy some more metal siding in lengths to span the garage perpendicular
> to the trusses. it will likely meet code where you are, it's light
> weight, it can carry a full 6" insulation batt or more if you need to
> heat the place and it doesn't burn. =A0 With a helper you could do the
> whole building in an hour. No problems with sagging, termites, or
> other annoyances. Choose a nice pattern and it won't look bad at all.
> If the siding available seems too gauche for your taste, most farm
> building makers will have real ceiling panels you can buy. Maybe a bit
> pricier, but prettier.
> Joe

Light weight???
that tin weighs a ton, ever tried to lift a sheet yourself? they use
forklifts to move the stuff.

how about popping up some foam board.. thats light weight, and you
could still insulate above it too.

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