Ceiling joists to far apart for drywall?

[oxmanwi]

So I have a 3.5 detached garage that is un-insulated and no drywall. This spring-summer I'm going to do just that. But my ceiling joists are kind of far apart? If you look at my plans I have 8 ceiling joists measuring 24' long and 46" apart and the two in the middle that are 26". My question is will I be able to have 8x4 sheets of drywall to hang up there? I also want to put blow insulation on top, so that is added weight.

 

[Zeke]

No way can you do 46". Add one down the middle of each bay and you'll be good for 5/8ths. You could install metal hats perpendicular as well. Do those at 16" O.C. I'd still try to provide some support like suspended ceiling wires.

Which brings the question, why not a suspended ceiling? Ideal for your circumstances.

 

[Moose97]

No way can you do 46". Add one down the middle of each bay and you'll be good for 5/8ths. You could install metal hats perpendicular as well. Do those at 16" O.C. I'd still try to provide some support like suspended ceiling wires.

Which brings the question, why not a suspended ceiling? Ideal for your circumstances.

I agree

 

[mikester]

I had the same problem with my 22x30. The joists were 48" OC. I bought a bunch of 2x8s and filled the middle spaces. Pretty much matched the amount of joists to the amount of roof rafters. The other thing I did that you might want to think about is I tied the joists to the rafters in spots with vertical 2x4s. This was added support because I put plywood on the top of them and a set of fold down steps so I had that little bit of extra storage and access to any wires if I need to change anything later.

 

[bczygan]

Not enough info.
You have 24 foot long joists?
What supports them in the middle?
What supports the roof?

What you have there are 2x6's that tie the side walls together, to keep them from bowing out and causing the hip roof to sway back and collapse. Pretty standard construction for a place to keep rain and snow off a car.

Even 2x6's at 12"o.c. in Doug, Fir SS don't make that span for 10#LL and 5#DL at 1/240 with no storage above:

http://publicecodes.cyberregs.com/icod/irc/2012/icod_irc_2012_8_par025.htm

Best solution is 2x8 joists #2 Hem-Fir @12"o.c..

 

[gayler]

How about putting joist hangers on your joists at 16 on center and span these with 2x6?

 

[KPSquared]

I see 2x6 on a 24' span. . . does anyone else think that is insane? There's a better chance if you hang something from the ceiling it will pull it down. What supports the roof?

 

[BJR]

I see 2x6 on a 24' span. . . does anyone else think that is insane? There's a better chance if you hang something from the ceiling it will pull it down. What supports the roof?

2x6 will sag at that length, ask me how I know.

Drawing says it's a hip roof so these are rafter ties. Hopefully there's collar ties, as well.

 

[Architorture]

The 2x6s aren't carrying any load...they are just loaded when awind load is on the walls

 

[texas webb]

I would do as Zeke says 2x2 ceiling grid then insulate.you can then put
2x4 fluor light fixtures as needed.You'll always have access above.

 

[Zeke]

Yeah, I should have mentioned that the "joists" are probably not level with each other and that any fill in needed to be 2 x 8 or BETTER. Get up and look down each one and see how much they have bowed down already. Do the suspended ceiling.

 

[oxmanwi]

No way can you do 46". Add one down the middle of each bay and you'll be good for 5/8ths. You could install metal hats perpendicular as well. Do those at 16" O.C. I'd still try to provide some support like suspended ceiling wires.

Which brings the question, why not a suspended ceiling? Ideal for your circumstances.

I don't know about a suspended ceiling, I really want drywall or plaster. How would you properly insulate up top with the 2x2 tile suspended?

Not enough info.
You have 24 foot long joists?
What supports them in the middle?
What supports the roof?

What you have there are 2x6's that tie the side walls together, to keep them from bowing out and causing the hip roof to sway back and collapse. Pretty standard construction for a place to keep rain and snow off a car.

Even 2x6's at 12"o.c. in Doug, Fir SS don't make that span for 10#LL and 5#DL at 1/240 with no storage above:

http://publicecodes.cyberregs.com/icod/irc/2012/icod_irc_2012_8_par025.htm

Best solution is 2x8 joists #2 Hem-Fir @12"o.c..

Sorry that was a goof, it's 24' long. There is a double 34' 2x4's going across the middle. There are 2x4 wind ties in the middle along with collar ties up top. I don't have any pictures right now, but I'll snap some in the next couple days when I get home.

I see 2x6 on a 24' span. . . does anyone else think that is insane? There's a better chance if you hang something from the ceiling it will pull it down. What supports the roof?

I goofed, it's 24'

 

[oxmanwi]

Some more pictures I have on my computer.

 

[CNGsaves]

Metal ceiling . . . . think it would work great with blown in cellulose insulation

This would be only AFTER you plan out all your lighting so rough in electrical is all done and any cripple studs added where needed.

 

[CharlestonJoe]

I would go with metal ceiling.
If your dead set on drywall then run what's called hat channel across the bottom of the ceiling joist, 16" or 24" on center then install the sheetrock to that. Hat channel is a metal channel shaped like a top hat and use the fine thread sheetrock screws to install it and your sheetrock. Add some blocking where you need to, for your garage door opener and such.

 

[Jeff Ivers]

If I had it to do over, I would not sheetrock the ceiling of my shop. I helped a friend put up a metal barn siding ceiling in his shop (white) and this is what I would do if making the decision today. The metal weighs much less than the sheetrock and will support your insulation just fine. If your ceiling joists are not in the same plane, you can easily shim as needed or run firring strips and attach to that.

 

[Zeke]

I don't know about a suspended ceiling, I really want drywall or plaster. How would you properly insulate up top with the 2x2 tile suspended?



Sorry that was a goof, it's 24' long. There is a double 34' 2x4's going across the middle. There are 2x4 wind ties in the middle along with collar ties up top. I don't have any pictures right now, but I'll snap some in the next couple days when I get home.



I goofed, it's 24'

Insulation can lay on top. However, after hearing more about the metal ceiling, I'd vote for that.

 

[dirttracker18]

The 2x6s aren't carrying any load...they are just loaded when awind load is on the walls

They don't have to carry any load to sag at that length. I would bet they are already sagged.

Whatever you decide I would make an attempt to support those 2X6's

 

[bczygan]

The 2x6's you have are totally inadequate to support even themselves.

If you really want a drywall ceiling, you have only 2 choices.

One is to add 2x6 joists but cut the span of all of them in half. That would require a beam running the long way in the garage. That would need to be a substantial beam with big headers at the ends where it would be over windows. To keep that beam reasonable a post in the middle would be reasonable.

The only other solution is the 2x8 joists. What you have now won't support anything, except maybe the suspended or metal ceilings. Even there, additional joists would help.