Hello! For a new roof install, half vaulted, no drywall, just exposed beam and rafters. The other half will have 8 ft ceilings, conventional rafter framing. Would it be a good idea either economically or structurally to have a glulam ridgebeam for the vaulted part and a smaller sawn lumber ridgebeam for the part with the ceiling? Horizontal plane is 48' x 36'.