I've seen a lot of great site built trusses.
I actually think a well constructed plywood gusset plated truss with glue and nails will out perform a metal plated truss. It's not the craftsmen that worry me its the DIYer who has limited experience building things and does not take the time and effort to do a quality job.
Trusses are unique structural elements that require special attention to the connection between members (joints).
One method to address the lack of quality control is to overbuild the truss slightly. This method is actually used to some degree in the manufacturer of MPC wood trusses.
I actually think a well constructed plywood gusset plated truss with glue and nails will out perform a metal plated truss. It's not the craftsmen that worry me its the DIYer who has limited experience building things and does not take the time and effort to do a quality job.
Trusses are unique structural elements that require special attention to the connection between members (joints).
One method to address the lack of quality control is to overbuild the truss slightly. This method is actually used to some degree in the manufacturer of MPC wood trusses.