Originally Posted by 2old2fast
Not trying to be a jerk but I think you need to be told , by cutting your trusses the way you did & not building back in at least some of the strength you removed you've really compromised the integrity of your roof structure. I have nearly 40 years in the remodeling business.
After seeing your comment, I went back and looked at the pic again. I'm not sure he's weakened the roof significantly. The top of the coffer, now acting as a bottom chord of the truss, extends to the top chords all the way across the span. If he were to have designed the coffer into the original trusses, they wouldn't look that different. The load is now being carried through the new bottom chord, and the original ceiling is now acting like a soffit, with the only weight on it being itself and the sheetrock. Just my opinion.