Holy Smokes! The design "guide" is 96 pages long!
I designed a flitched beam (just learned to word and I'm already throwing it around like I'm the king of flitched beams!) once for a friend of the boss (no, not my wife, the company president). The timber contribution was so insignificant, that I just ignored it. Of course, in that case, I added two steel plates to a timber beam, rather than one steel plate sandwiched between two pieces of lumber. But still, 96 pages?!!
All kidding aside, thanks for the post. I downloaded the guide and will keep it for future use.
Ron