I have a 24x 26 garage that i am finishing the upstairs. there are 4 foot side walls on the front and back of the building. The height from floor to peak is 16', and 12' from top plate to peak. (4' walls) the rafter span is 12', and i have used 2x10 for the rafters and 2x6 walls rafters and walls 16" on center. I have installed rafter ties on every rafter of my vaulted ceiling at a height of 8' (floor to ceiling, 4' top plate to ceiling) to prevent wall spreading. My question is,which I have read many places but am not sure if it is relevant to vaulted ceilings, can I double up the rafter ties and bolt them to the rafters then remove 2 of every 3 making them 4 feet on center? Also are the 2x10 rafters strong enough to have the rafter ties 1/3 of the way up with a 70 psf ground snow load? I'm sure it won't collapse but I want it to
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