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Another Drywall Question
- Thread starter Mendolat
- Start date
Cyberbear
Well-known member
You first need to adequately reinforce your ceiling to support both the drywall weight and the proposed future load. Average drywall sheets like 16" centers but you are free to use whatever works best for your application.
Kevin54
MEMBER EMERITUS
Strapping and lightweight drywall.
icenfire01
Well-known member
I would run 2X4's parallel to you rafters 24" OC and attach 5/8 drywall or 16" OC and 1/2" drywall. Keep in mind that will add a lot of weight, Steel might end up being lighter and you might be able to attach that directly to your rafters but I don't know the maximum span for tin.
bczygan
Well-known member
You need to add at least one, and maybe two new ceiling joists between each of the existing ones, and check if the existing ones are adequate. You may need to use lightweight drywall or even a metal ceiling, depending on spans and loads.
You need to properly size and space the joists for the general area, and then look at the loads that the storage systems will add. Joists in these areas may need different sizes, spacing and material.
Also check if the header over your door will support these additional loads.
What is the header composed of?
Do you intend to store anything above the ceiling or insulate?
What is your span and what size are the existing joists? And check that spacing, 36" is odd.
You need to properly size and space the joists for the general area, and then look at the loads that the storage systems will add. Joists in these areas may need different sizes, spacing and material.
Also check if the header over your door will support these additional loads.
What is the header composed of?
Do you intend to store anything above the ceiling or insulate?
What is your span and what size are the existing joists? And check that spacing, 36" is odd.
Last edited:
Firebird 1
Well-known member
Looks like 2 x 6 bottom chords, should be able to attach perpendicular strapping and use 5/8 drywall. I would use 2 x 4 if you have clearance. I would not use the above area for storage though. I would space the nailers at 16 oc
For your storage systems, add a beam (doubled up joist) at each location you plan on. Can't tell span, depending on that and load, size your beam accordingly.
Sheetrock: no one living above garage, 1/2 ultralight Sheetrock with strapping 16" on center. 1 by 4 strapping attached with screws is fine. 16 oc will give you a rigid ceiling.
Gary
Sheetrock: no one living above garage, 1/2 ultralight Sheetrock with strapping 16" on center. 1 by 4 strapping attached with screws is fine. 16 oc will give you a rigid ceiling.
Gary
bczygan
Well-known member
20' span
No storage
#2 Doug Fir 2x6's at 12"o.c.
1/2" DW
This means adding 2 new joists between each of your existing ones.
(This assumes that the existing joists are also at least #2 doug fir 2x6's)
Check other species for spacing, and size for the span and load conditions.
Or...
Use one new 2x8 joist between each of the existing ones. This will provide adequate support, but the spacing is off, so 1x or metal strapping at 16"o.c. across the joists, would be needed.
Also don't forget to check garage door header size.
Blocking at 1/3 points.
No storage
#2 Doug Fir 2x6's at 12"o.c.
1/2" DW
This means adding 2 new joists between each of your existing ones.
(This assumes that the existing joists are also at least #2 doug fir 2x6's)
Check other species for spacing, and size for the span and load conditions.
Or...
Use one new 2x8 joist between each of the existing ones. This will provide adequate support, but the spacing is off, so 1x or metal strapping at 16"o.c. across the joists, would be needed.
Also don't forget to check garage door header size.
Blocking at 1/3 points.
Last edited:
matt_i
Well-known member
Amongst other issues it looks like you will also have to frame a "box" or "tray" for the garage door opener, simply because it is not below the plane of the horizontal truss members. When the drywall gets installed, taped, mudded, etc, the door opener will have to come down.
bczygan
Well-known member
20' span
No storage
#2 Doug Fir 2x6's at 12"o.c.
1/2" DW
This means adding 2 new joists between each of your existing ones.
(This assumes that the existing joists are also at least #2 doug fir 2x6's)
Check other species for spacing, and size for the span and load conditions.
Or...
Use one new 2x8 joist between each of the existing ones. This will provide adequate support, but the spacing is off, so 1x or metal strapping at 16"o.c. across the joists, would be needed.
Also don't forget to check garage door header size.
Blocking at 1/3 points.
The above is from span tables you can find on the net. Check them yourself.
You need 5 items to calculate a joist.
Span
Max. deflection
Species/strength
Dead and live loads
Size/Spacing
Remember to calculate the storage areas for actual loads and check the door header.
Last edited:
Kevin54
MEMBER EMERITUS
Strapping and lightweight drywall.
No need to use the standard 5/8 drywall when you can get lightweight drywall instead. Lightweight is just as sturdy but a little over half the weight of standard drywall. Run you strapping 90 degrees to your rafters at 2' on centers. Screw the drywall on and call it good.