I deleted the page Engineering materials that you created for a number of reasons.  First is a copyright violation of the website aboutcivil.com.  As all of your editing has only been on behalf of this site I suspect that you have a conflict of interest in regards to this site, and you may be a spammer.  Also wikipedia is not a how to guide, it is an encyclopedia and the material in the article was not appropriate for  an encyclopedia.  Please do not recreate the article.