To build a common roof truss you must be familiar with the seven parts of a common roof truss. They include the top chord, bottom cord, bearing point, web supports, king post, metal gussets, and the tail. You can go to http://www.diy-hq.net/outdoor/how-to-build-a-roof-truss.html for more detailed how-to information. This DIY site also offers how-to info on other types of roof trusses. It also
. includes lists of materials for certain types of roof trusses.