Most Comfy Sleeper Sofa Set Ikea on the web to Average Sofa Seat Height in higher resolution for absolutely free. If you tilt the couch you want to account for the reality that all of the sides of your proper triangle could be at an angle. Unless the length of the couch is < height of the door, I’m not seeing much of a problem with that couch. Thus the shortest distance would be holding the couch such that an imaginary line parallel to the floor intersects the appropriate angle formed by the bottom and back of the couch, which would form two other right triangles whose hypotenuses would be 42 and 34 inches, respectively.
We’ll need to have to know how high the front of the couch is. From there, we can calculate the distance from the reduce back, to the invisible line from the front of the seat, to the major of the back, and thusly calculate the distance from the reduce back to the invisible line. Unless the length of the couch is > height of the door, I’m not seeing considerably of a issue with that couch.