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#8x3 screw. Pull out strength

#8x3 screw. Pull out strength

#8x3 screw. Pull out strength

(OP)
Does any body have a freeware or spread sheet per ACI 318 to find out the pull out strength of #8 screw embedded 1.5" in the concrete. Also what will be the diameter for #8 screw?

RE: #8x3 screw. Pull out strength

I made a very slick spreadsheet for app D.  It was intended for headed studs and anchor rods with nuts/plates, but can be used with anything if you give Ase and Abrg.  If you let me know that and the material strengths I can give you an answer.   

RE: #8x3 screw. Pull out strength

(OP)
can you send me that slick spread sheet. you can upload here

RE: #8x3 screw. Pull out strength

Sorry, I can't.
I made it for my company - it took about 60 hours to put together.  It does a full bolt group analysis (for eccentric loads), and even has a 40 page handout complete with examples.
If you post your info I can help you out.

RE: #8x3 screw. Pull out strength

(OP)
Actually that is also part of my question. I do  not know it's diameter etc.Assume footing to be 12" wide continuous wall ftg.

RE: #8x3 screw. Pull out strength

going by the wood screw properties in NDS the Ase is 0.01347 in^2.  Assume 36 ksi yield and 58 ksi tensile strength, the capacity would be 583#.  This assumes that you have 1.5" embed and the head is large enough to ensure pullout doesn't control.

RE: #8x3 screw. Pull out strength

I should say that is a factored load (I assumed that went without say since we're talking about ACI 318, but just wanted to throw that out there).

RE: #8x3 screw. Pull out strength

One problem with trying to do this is that small screws like this can be made of anything.  Unless it is a trusted and controlled source, I wouldn't like to depend on it as anything other than a nominal fixing.

RE: #8x3 screw. Pull out strength

I would think you can find this info from the manufacture.  Specify titen screw for example.  Titen is a simpson product that you can use through concrete.  It will give you minimum edge distance to make sure it follows appendix D.

Never, but never question engineer's judgement

RE: #8x3 screw. Pull out strength

(OP)
sorry posted reply to wrong thread

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