Dear friends, u can use limit analysis for your work. in this method there is no need to use young modulus and shear modulus. u can download basic information from this link: uploadboy.com/aoxq7tmmzq3u.html
Dear friends, you can use Timber pile design manual for your professional works. i have attached some suitable download link for the purpose.
http://uploadboy.com/d62ttrre0prh.html : bridge modeling
http://uploadboy.com/93dfikex4tuv.html : beam modeling...