Originally Posted by
Pete Lauterer
Make sure there is contact or weight bearing between the upper and lower truss at the ends. The upper and lower sections must be in contact at outside ends.
Not always a correct statement.
It depends on the design and loading of the truss and its bearing points. Most that I have seen want the bottom chord of the top truss set directly on the top chord of the lower truss, and, when the correct trusses are installed together, the bearing points line up.