Tilt the sofa forward so the front is on the floor and you can see the bottom when you stand behind it.
Remove the bolts and nuts securing the bottom support rail to each section of the sofa using a socket and ratchet. Repeat the procedure with the top support rail.
Remove the wing nuts securing each section of the back to the sofa frame by turning them counterclockwise. Pull each back section from the sofa frame and set it aside. The sofa is now in six sections and is ready to move.