Design with tek screws 1

[Staed79]

Has anyone worked with Tek screws.
I need to know the diameter and propeties for those screws.

If i am using #14 tek screws, how do i go around calculating the my required loads, the screw can bear.

what does # in 14 means.

I also needed to know the size / diameter for those screws..

 

[Lion06]

Look in a Dietrich Catalog. You can get shear and tension values for different gauge thicknesses. I believe it will also tell you the diameter. If Dietrich doesn't have the diameter, I am pretty sure Hilti does.

 

[Staed79]

I looked in Hilti, but didnot come across the name Tek screws , Do they call it by different name
and what does # in tek stand for...
is it like rebars in steel..

 

[Lion06]

# is just a reference to the diameter of the screw.
I believe TEK just means it is meant for metal to metal connection.

 

[nutte]

Teks is a brand name of the screw, manufactured by Buildex. Their website has everything you're looking for.

http://www.itwbuildex.com

 

[Lion06]

nutte-
I've found about 50 websites that sell "TEK" screws. Are they all just vendors for Buildex?

 

[spats]

"TEKS" screw is universally used for self-tapping, self-drilling metal screws, just like "Bandaid" is used for adhesive bandages.

 

[dcredskins]

As nutte said, TEK is the brand name for self drilling screws by ITW BUILDEX. When you say #14, it means nominal screw size. Look at the ITW BUILDEX website. You will find all the info.

 

[Lion06]

I am not so sure. If you google TEK screws, you get a lot of sites that sell them with no mention of Buildex.
Maybe you guys are right, but it seems to be a more generic term for self-drilling, self-tapping metal screws like spats says.

 

[UcfSE]

TEK is a brand name for self-drilling self-tapping screws made by ITW. Hilti calls them Kwik-Pro. Grabber calls them something else, as do other manufacturers. The term is often used generically, like saying "tapcons" for concrete screws or the Band-Aids reference above, but formally TEK is a brand name.

To design with them, you can refer to manufacturer-supplied data that is usually based on testing, but not necessarily. Alternatively you can use your material standard. If these are for cold-formed steel connections you would use the NASPEC if you're in North America. It is you'll find different limit states to be checked with which you can arrive at a final design value for shear, tension, pull-out and pull-over. If you are not in North America, see if you have a similar standard to use.

 

[LowLax]

SSMA catalog has screw shear and tension values for different sheet metal thicknesses.

 

[Staed79]

Lowlax, i was about to post/ ask how do cal the Shear and tension values
But i went to

http://www.itwbuildex.com/304ssbondedtek.htm

and got tension and shear values..(i still have to figure out which values i have to use if i am using a particular tek screws)
But is there not reductions for spacing and edge distances for tek screws..

 

[Staed79]

As Dcredskins and other said
i did go to

http://www.itwbuildex.com/304ssbondedtek.htm

and found information about the tek screws (pg 48)

 

[abusementpark]

So, if you all specify on your plans is, for instance, #12 TEK screws, will you get the same product, no matter who the manufacturer is?

 

[Staed79]

To add to that:
There is no shear and tension values for Tek #14..at SSMA catalog

 

[Staed79]

Teks%20HeavyDutyAllowableLoads[1].pdf

 

[UcfSE]

abusement, yes that's basically what happens.

Staed, look at another manufacturer or calculate the value. No. 14 is pretty big btw. Below are reports for both Grabber screws and Hilti screws (they list no. 14). Compare the two.

ICBO 5280 Grabber screws

ICBO 2196 Hilti Kwik-Pro

ICBO 1976 ITW Tek

Note that the Tek screw report does not give you test values for conditions other than the screw itself, using the same nomenclature as the NASPEC. The report instead refers you to the NASPEC to calculate shear and tension and so on.

 

[abusementpark]

Ok, I see this in the Hilti table, and also Clark-Western tables from my catalog at work, that under the "Screw Designation" Column, they list #12-12 & #12-24. What is the difference here?? Which one do I get when I call out for a #12 TEK screw?

 

[PatBethea]

Allright, looks like a ME is needed here. As stated above, Tek is just a trade name, as far as I know, for a self-tapping screw. The "#" refers to the diameter. A #12 screw is a 0.216" diameter and a #14 is a 0.242" diameter. The second number (#12-24) refers to the threads per inch. For a #12 screw, the standard number of threads per inch for a coarse threaded screw would be 24. I assume a #12-12 would typically be used in wood or plastics due to the smaller number of threads.

 

[PatBethea]

For comparison's sake, a typical 1-5/8" long, coarse threaded drywall screw is a #8-8 (0.164" diameter, 8 threads per inch).