Screwed Roof Deck 1

[Lutfi]

Hi to all. I have been away from the forum for a while.

At any rate, I was wondering and I already began search on data to support diaphragm values for screwing wood sheathing into light gauge metal trusses with TEK screws. I already contacted eh APA and they stated that they do not have any data. However, they have some notes regarding the process that they will e-mail to me.
Anyone in here who has such data, please share it.
Thanks,


Regards,
Lutfi

 

[Taro]

http://www.huduser.org/publications/destech/horidia.html

 

[Lutfi]

Many Thanks Taro.

Regards,
Lutfi

 

[MiketheEngineer]

You might check with Alpine Engineered Products - they design LG steel trusses and probably have the data you need.

Also - Mitek

 

[JD2]

I've gone thru the same research and managed to find several papers and research projects. There is a paper put out by the APA titled "Fastening of Wood Panel Structural Panels to Steel Framing - Design Aids". It includes results from tests performed by APA, a CABO report National Evaluation Service Committee Report No. NER-211, an ICBO Evaluation Service , Inc. Report No. 3447 and No. 4144, APA Research Report # 138 "Plywood Diaphragms". There is a Research Paper (Department of Civil Engineering, University of Pittsburgh)Research report No. CE/ST-09 titled Shear Resistance of Walls with Steel Studs". I have a couple of newsletters from the Light Gauge Steel Engineers Association that summarizes results from some other research projects done at Santa Clara University. There was an APA Research Report #154 titled "Structural Panel Shear Walls". Most of the data is at lest 10 years old but it should still be valid. The main problems with most of the tests is that they are forced to limit their scope. If you consider the number of different configurations using steel studs (various gages and configurations), steel members (joists, beams, etc.), screw sizes, plywood thicknesses, framing arrangements, etc. the numbers of tests required to come up with definite numbers for all conditions seem to be staggering. All of the test results in the reports mentioned above at least offer some definite tested values that you can apply your own safety factors, situations, etc. to come up with some realistic design numbers even if your situation is somewhat different.

Don't know if this helped. I don't have the ability to electronically send any of this stuff but if you would like me to fax some of it to you, I would be glad to do that.

 

[ssweetland]

Have you checked the AISI Standard "Standard for Cold-Formed Steel Framing - Lateral Design", 2004 Ed.? There are diaphragm values, and shear wall values in this standard along with the references that were used in developing them.
Hope this helps.