American Hornbeam...CRACK

[Jim Davis]

Lots of good points above and good summaries of what we are up against.

Posting that chart because it is good. Too bad for us that few tests of tensile strength have been recorded or published.


 http://www-materials.eng.cam.ac.uk/mpsite/interactive_charts/strength-ductility/woods.jpg

[PatM]

The wood database lists tensile strength for numerous species, particularly ones useful to us.

[DC]

Where are you finding that Pat? I looked at Yew and Osage, no tensile strength. Are they calling it something else?

[Jim Davis]

I also just looked at  Osage and Oak on the Wood data base--no tensile numbers.

Once again, I want to point out that the Wood Data Base, while very useful and easy to use, is a secondary source for all the data. He explains that it all came from other places such as the Forest Products Laboratory.

It is possible to extrapolate tensile strength from the other numbers. I don't re call which sets of figures, but tensile strength fall about midway between two of the sets. I have been to lazy to ever work that out.

[Philipp A]

Hi all,

I found this paper. Have not had a chance to digest it yet, but tons of information in here! It will take me a while to make sense of it all

http://www.conradlumberco.com/pdfs/ch4-Mechanical-Properties-of-Wood.pdf

[PatM]

I  was mistaken on which website had some of the info.  Hunt around via google though. You can track a lot of them down. It will mostly confirm what you already know.

[Jim Davis]

This:

http://www.conradlumberco.com/pdfs/ch4-Mechanical-Properties-of-Wood.pdf

has some tension numbers, but they are for perpendicular too the grain...

[PatM]

This page has some hints with Hickory and Elm numbers.     http ://basiccarpentrytechniques.com/The%20Mechanical%20Properties%20of%20Wood/The%20Mechanical%20Properties%20of%20Wood%201.htm