Scissor Trusses are a bit more expensive, but give some height in the middle of the room. Scissor trusses tend to spread a little when they are loaded. They act like the leaf springs on a truck. As snow piles up on the roof, the truss will squat down and spread out from wall to wall. We try to keep truss deflections to less than half an inch, so they really don’t matter much for the interior finishes.Have a Question?