We are about to start framing an addition that calls for scissors trusses until the existing house when the roof will then be stick framed. The existing house is a gable that is perpendicular to our new addition. The plan calls for a vaulted (slope) cellieng down from the original ridge around new valleys and into the addition using scissor trusses in the addition side only. Theplan calls for a girder truss at the house to carry the ridge beam of the stick framed valley side of the new gable. The girder truss is just a doubler scissor truss, can we hang our ridge from that truss? I rarely work with trusses and was just wondering if you have had any experience.