Bought galvalume 5 rib white panels to use as ceiling in my32x40 pole barn. The panels are 8’x3’, I’m no carpenter but I’m a pretty good learner, my question is how far apart can I space the studs between the trusses? Is 4’ ok? I will be putting R38-40 batt insulation on top of the panels but that’s it. Thanks in advance, searched but had no luck.
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5 rib ceiling panel question
- Thread starter darkkevin
- Start date
question, how far apart are your trusses ?
Most panels will go 4' with insulation on top. You can get other profiles that will span farther.
8' panels are really short and don't have any extra for the overlap. Could at least go 10' even doing it by yourself. If you have help 20' sheets would be quick, a lot less seams.
Biggest thing is get them a few inches long so they overlap
8' panels are really short and don't have any extra for the overlap. Could at least go 10' even doing it by yourself. If you have help 20' sheets would be quick, a lot less seams.
Biggest thing is get them a few inches long so they overlap
mitusa
Well-known member
The ceiling in my barn is white R-panel, 26 gauge. The rafters are on 8 foot centers. I have around 4-6 inches of cellulose on top of the ceiling. But the R-panel in my barn is 32 feet long and is attached to metal trusses, not wood, every eight feet.
I'm guessing that your rafters are set on eight foot centers too. But the fact that your lengths are only eight feet, 3 inches makes me wonder if they would sag....
I'm guessing that your rafters are set on eight foot centers too. But the fact that your lengths are only eight feet, 3 inches makes me wonder if they would sag....
question, how far apart are your trusses ?
8 ft between trusses, was thinking 24” on center studs between trusses to mount the panels but now I’m thinking that’s expensive overkill. If it needs to be, that’s fine, but it 4’ between studs work that’s much less $$
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Actual inside dimension of the walled space is like 30.5’ so I do have room for overlap with 4 8’ panels thankfully.Most panels will go 4' with insulation on top. You can get other profiles that will span farther.
8' panels are really short and don't have any extra for the overlap. Could at least go 10' even doing it by yourself. If you have help 20' sheets would be quick, a lot less seams.
Biggest thing is get them a few inches long so they overlap
readhead
Well-known member
We need more info. What gauge are you using? Five rib needs fairly close spacing. 29ga probably 30” max and 48” for 26ga. Plan your layout so you aren’t looking into the laps from the most common viewing angle.
readhead
Well-known member
I would go 30" spacing and screws on each side of the ribs.
readhead
Well-known member
I just thought of something. When you say five rib do you mean 5V with two small V shaped ribs or are you talking five equally spaced ribs at 9" OC? Two completely different products. I sell roofing and have never heard of anyone calling the later "five rib" but that may be a regional thing.
this right here, only 8' length
https://www.homedepot.com/p/Metal-S...eel-Roof-Panel-in-Galvalume-2313441/204289030
https://www.homedepot.com/p/Metal-S...eel-Roof-Panel-in-Galvalume-2313441/204289030
readhead
Well-known member
That helps clarify what you are using. For that product you could go 4' oc but you will need to fasten the laps at 30" oc.
rburke65
Well-known member
Initially you think you’re saving some dollars by going with 8’ truss on center, but it usually costs you down the road
WNYflyer
Well-known member
FWIW and my interpretation,
Link to Instruction/Assembly. Link is on the HD page you linked under "Info & Guides". Is shows the allowable uniform live loads versus span for 24, 26, 29 gage panels. Have no idea why the table says "for various fastener spacings" rather than the more typical "allowable support spacing " or "allowable span". Per the foot notes the table is based upon a minimum three span panel installation. If doing a double span versus a triple span installation probably need to downgrade the allowable load live load shown in the table by approximately 25% for stress purposes. Deflection will actual go down for a double span versus a triple span when subjected to a uniform load. Table doesn't seem to say if the allowable loads are based on stress or deflection limits. Should give you a feel for a good spacings.
https://images.thdstatic.com/catalog/pdfImages/c6/c6380616-097b-40d7-b4cc-8573b3cc757d.pdf
Link to Instruction/Assembly. Link is on the HD page you linked under "Info & Guides". Is shows the allowable uniform live loads versus span for 24, 26, 29 gage panels. Have no idea why the table says "for various fastener spacings" rather than the more typical "allowable support spacing " or "allowable span". Per the foot notes the table is based upon a minimum three span panel installation. If doing a double span versus a triple span installation probably need to downgrade the allowable load live load shown in the table by approximately 25% for stress purposes. Deflection will actual go down for a double span versus a triple span when subjected to a uniform load. Table doesn't seem to say if the allowable loads are based on stress or deflection limits. Should give you a feel for a good spacings.
https://images.thdstatic.com/catalog/pdfImages/c6/c6380616-097b-40d7-b4cc-8573b3cc757d.pdf
readhead
Well-known member
WNYflyer, Those specs are for roof applications. He is using it for a ceiling liner to support FG insulation. In that application I add 1# of collateral load in addition to any other loads for the roof structure. As I mentioned before 4'oc with screws on both sides of the rib and lap screws should be okay.
WNYflyer
Well-known member
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You're welcome, good luck on your installation.
readhead,
Yep understood, lacking any information just gives an idea of where he stands with spans versus uniform load. Since he only has 8' panels the link shows that a 4' span/support spacing is way more than adequate for a ceiling installation subjected only to the panel weight plus insulation.
Leave it to me to miss the free instructions listed on the purchasing website. Thank you!
I have done reading to do tonight it seems
You're welcome, good luck on your installation.
WNYflyer, Those specs are for roof applications. He is using it for a ceiling liner to support FG insulation. In that application I add 1# of collateral load in addition to any other loads for the roof structure. As I mentioned before 4'oc with screws on both sides of the rib and lap screws should be okay.
readhead,
Yep understood, lacking any information just gives an idea of where he stands with spans versus uniform load. Since he only has 8' panels the link shows that a 4' span/support spacing is way more than adequate for a ceiling installation subjected only to the panel weight plus insulation.
readhead
Well-known member
It wouldn't work for a single span so the suggested 4' OC spacing.
I started adding studs between the trusses last night at 30" spacing, figure this is a decent compromise and will allow 2 15" batts of insulation to fill the tops nicely between studs. thanks everyone for the guidance. pics will follow soon (ish)