I'm not a TJI guy like I said but they are brand specific, every manufacturer has different rules just like truss designers. This isn't weyerheauser (can't remember which it is) but the engineer will pull their specs off their website I'd imagine. Or maybe they just say **** it 😆
I don't let trusses get cut without the truss designer telling me what they want in an email.
House isn't terrible framed but I doubt the boys gave much of a chit about rules in 1999, I never saw an engineered or stamped drawing until I was 22 and I was in the trades part time all through high school, mostly new framing. Lots of big ass houses with guys like me who graduated 225 of 227 in their high school class just be spit balling figures out for their hands to butcher lol. I've never been scared to use a span chart and do my own specs either until my insurance agent fkipped out in 2017 and acted like they were going to take away my birthday - lol. Anyway no Mas spit balling, I even get retaining walls and docks engineered
Trusses all the way, even that little bunk room over the garage has 18 inch trusses