Flitch plate roof rafters to create vaulted ceiling?
A few weeks ago I got some great advice in my general discussion about vaulting a ceiling in a ranch house. One idea that didn’t come up was converting to flitch-plate roof rafters. FHB had an article on this by Michael Chandler several years ago.
The space I’m trying to open up is about 25′ eave-to-eave. Roof pitch is 4 in 12 (maybe 5 in 12), located in SF bay area where snow / wind loads are lower, seismic higher. What experiences do people have using flitch rafters either in a retrofit situation (in my case to remove fink trusses) or where you have the liberty to do a totally-new roof?
Some advantages to this approach vs others as I understand: you avoid needing to have a ridge beam and finding a place to drop supporting posts to solid footing and existing load bearing is largely unchanged. One disadvantage as I understand it is the rafters could be substantial, maybe even pairs of 2×12, so I’m guessing I’d have to have some portion of them being exposed (which can work).