Roof R panel and fastener question
Roof R panel and fastener question
(OP)
Anyone knows where this table was derived from?
I'm also looking to find the formula for the uplift capacity of #12-14x1" self driller for the roof to purlin fastener.
I would think this is dependent on the roof gauge and purlin thickness, but can't find the formula to get for uplift capacity.
I'm also looking to find the formula for the uplift capacity of #12-14x1" self driller for the roof to purlin fastener.
I would think this is dependent on the roof gauge and purlin thickness, but can't find the formula to get for uplift capacity.






RE: Roof R panel and fastener question
for screws, values will as you said, depend upon gage thickness against head of screw and thickness and quality of materials receiving point of screw. you may want TEK screws such as http://www.itwbuildex.com/index.html somewhere in their literature they will provide the values you're looking for. someone may post.
RE: Roof R panel and fastener question
You can use published screw strengths from the screw manufacturer if you can find values for matching conditions (base thickness/strength, attached thickness/strength) or you can use AISI (if located in the North America). An ASD example is below:
Juston Fluckey, SE, PE, AWS CWI
Engineering Consultant
RE: Roof R panel and fastener question
Anyway, in this industrial shed I have specify everything. I thought 24 gauge R panel roof have standard capacity and not manufacturer specific? Where can I get R panel "standard" capacity formula similar to the table?
RE: Roof R panel and fastener question
RE: Roof R panel and fastener question
No, that snapshot is from my MathCAD library. Nothing is hidden, so you could easily reproduce it in Excel if you like. If you want generic, then that calculation is for you. As far as generic span table, it will greatly depend on the profile of the deck and AISI checks are not something "generic". Hand calculations will require an iterative design process. I use a program called CFS to check formed sections, but it is not free. If it is the metal builders livelihood to bend decks, then they should be able to provide you with span capacities. If they just happen to be some outfit that has a roll former, then you need to make sure you specify minimum thickness and yield/ultimate strengths of coils.
Juston Fluckey, SE, PE, AWS CWI
Engineering Consultant
RE: Roof R panel and fastener question
I don't know who the contractor will use to buy the roof panel.
How do I get the capacity " 24 GA "R" PANEL " without being manufacturer specific.
If you can link me to the formula for this, I'd appreciate.
Thanks,
RE: Roof R panel and fastener question
Juston Fluckey, SE, PE, AWS CWI
Engineering Consultant
RE: Roof R panel and fastener question
I need to show in my drawing the type of roof to use.
I guess I'll just specify the manufacturer and say approved equal?
This is just a simple industrial shed. I didn't realize there is no "standard" R panel roof capacity or formula.
I'm looking at a goby drawing and it just specified, 24GA "R" panel. Not saying the goby is correct though.
RE: Roof R panel and fastener question
Uniform Load on R-Panel = XX psf
Maximum Span of R-Panel = X'-Y"
Use 24 GA (pick a manufacturer that will work) R-panel or equivalent. Owner responsible for verifying equivalent load capacities for the given span with the manufacturer of the equivalent panel.
Juston Fluckey, SE, PE, AWS CWI
Engineering Consultant
RE: Roof R panel and fastener question
RE: Roof R panel and fastener question
1) fastener pull-out driven by screw diameter and thickness of supporting steel
2) fastener pull-over driven by screw head or washer diameter and the thickness of the roof panel.